From 75286b8eabb02709ca5aabf5baa2a46594b90e70 Mon Sep 17 00:00:00 2001
From: WPT Sync Bot <josh+wptsync@joshmatthews.net>
Date: Sun, 16 Apr 2023 01:26:13 +0000
Subject: [PATCH] Update web-platform-tests to revision
 b'f0b66362cc5dec54d81e0a56458b48f310a2eba9'

---
 .../absolute-non-replaced-height-003.xht.ini  |    2 +
 .../absolute-non-replaced-height-004.xht.ini  |    2 +
 .../absolute-non-replaced-height-005.xht.ini  |    2 +
 .../absolute-non-replaced-height-010.xht.ini  |    2 +
 .../absolute-non-replaced-height-011.xht.ini  |    2 +
 .../absolute-non-replaced-height-012.xht.ini  |    2 +
 ...solute-non-replaced-max-height-004.xht.ini |    2 +
 ...solute-non-replaced-max-height-005.xht.ini |    2 +
 ...solute-non-replaced-max-height-006.xht.ini |    2 +
 ...solute-non-replaced-max-height-010.xht.ini |    2 +
 ...solute-non-replaced-max-height-012.xht.ini |    2 +
 ...isplay-none-dont-cancel.tentative.html.ini |   15 +
 ...-attachment-fixed-inline-scrolled.html.ini |    2 +
 .../abspos/position-absolute-013.html.ini     |  156 --
 .../css-flexbox/justify-content-007.html.ini  |    3 +
 .../table-as-flex-item-max-content.html.ini   |    2 +
 .../variations/font-weight-matching.html.ini  |    1 -
 .../overlay/overlay-computed.html.ini         |   18 +
 .../overlay-transition-property.html.ini      |    3 +
 .../overlay/overlay-valid.html.ini            |   18 +
 .../properties-value-002.html.ini             |   24 +
 .../properties-value-inherit-001.html.ini     |  150 --
 ...elementFromPoint-dynamic-anon-box.html.ini |    1 +
 .../cssom-view/elementFromPosition.html.ini   |    3 +
 .../elementsFromPoint-iframes.html.ini        |    3 +
 .../selectors/selectors-4/lang-011.html.ini   |    2 +
 .../selectors/selectors-4/lang-012.html.ini   |    2 +
 .../fetch/content-type/response.window.js.ini |    3 -
 ...lement-img-environment-change.sub.html.ini |    4 +-
 .../navigating-across-documents/005.html.ini  |    1 +
 ...c-aboutblank-navigate-immediately.html.ini |    3 +-
 ...url-return-value-handling-dynamic.html.ini |    3 +
 .../replace-before-load/a-click.html.ini      |    3 +
 .../embedded-opener-remove-frame.html.ini     |    2 +-
 ...FilterObject.dropShadow.tentative.html.ini |    2 -
 .../html/dom/idlharness.https.html.ini        |  270 ++-
 ...ocument-with-fragment-nonexistent.html.ini |    4 +-
 .../http-equiv-and-name-1.html.ini            |    3 +
 .../http-equiv-and-name-2.html.ini            |    3 +
 .../media_fragment_seek.html.ini              |    3 +
 .../iframe_sandbox_popups_escaping-1.html.ini |    3 +-
 .../iframe_sandbox_popups_escaping-2.html.ini |    3 +-
 .../iframe_sandbox_popups_escaping-3.html.ini |    3 +-
 ...rame_sandbox_popups_nonescaping-3.html.ini |    3 +-
 ...rse-a-sizes-attribute-quirks-mode.html.ini |   24 -
 ...rm-during-planned-navigation-task.html.ini |    4 +-
 .../defer-script/async-script.html.ini        |    4 -
 .../event-handler-all-global-events.html.ini  |    9 +
 ...nt-handler-attributes-body-window.html.ini |    9 +
 ...andler-attributes-frameset-window.html.ini |    9 +
 ...andler-attributes-windowless-body.html.ini |    6 +
 .../resource-timing/idlharness.any.js.ini     |   12 +
 .../selection/idlharness.window.js.ini        |   15 +
 .../anchors/idlharness.https.window.js.ini    |    3 +
 .../webxr/idlharness.https.window.js.ini      |    6 +
 .../FileAPI/url/url-charset.window.js.ini     |    4 +
 .../url/url-in-tags-revoke.window.js.ini      |    2 +-
 tests/wpt/metadata/MANIFEST.json              | 2035 ++++++++++++++---
 .../CSS2/floats/hit-test-floats-001.html.ini  |    3 +
 .../CSS2/floats/hit-test-floats-002.html.ini  |    3 -
 .../CSS2/floats/hit-test-floats-003.html.ini  |    3 +
 .../CSS2/floats/hit-test-floats-005.html.ini  |    3 +
 .../block-in-inline-hittest-002.html.ini      |    3 -
 ...k-in-inline-hittest-relpos-zindex.html.ini |    3 -
 .../hit-test-anonymous-block.html.ini         |    3 -
 ...isplay-none-dont-cancel.tentative.html.ini |   15 +
 ...-attachment-fixed-inline-scrolled.html.ini |    2 +
 .../hittest-anonymous-box.html.ini            |    3 -
 .../hittest-before-pseudo.html.ini            |    3 -
 .../css-flexbox/justify-content-007.html.ini  |    3 +
 .../table-as-flex-item-max-content.html.ini   |    2 +
 .../variations/font-weight-matching.html.ini  |    6 +
 .../overlay/overlay-computed.html.ini         |   18 +
 .../overlay-transition-property.html.ini      |    3 +
 .../overlay/overlay-valid.html.ini            |   18 +
 ...e-with-filter-and-hidden-backface.html.ini |    3 -
 .../cssom-view/elementFromPoint-001.html.ini  |    3 +
 .../elementFromPoint-float-in-table.html.ini  |    3 -
 .../elementFromPoint-list-001.html.ini        |   12 -
 .../elementFromPoint-subpixel.html.ini        |    3 +
 ...omPoint-visibility-hidden-resizer.html.ini |    3 -
 .../cssom-view/elementFromPosition.html.ini   |    6 +
 .../elementsFromPoint-invalid-cases.html.ini  |    3 -
 .../elementsFromPoint-simple.html.ini         |    3 +
 ...scroll-behavior-smooth-navigation.html.ini |    6 +
 .../scripting-print-noscript.html.ini         |    2 +
 .../scripting-print-script.html.ini           |    2 +
 .../css/mediaqueries/scripting.html.ini       |   27 +
 .../selectors/selectors-4/lang-011.html.ini   |    2 +
 .../selectors/selectors-4/lang-012.html.ini   |    2 +
 .../fetch/api/basic/keepalive.any.js.ini      |    1 +
 .../redirect/redirect-keepalive.any.js.ini    |    2 -
 .../fetch/content-type/response.window.js.ini |    3 -
 .../css-images.sub.tentative.html.ini         |    3 +
 .../empty-iframe-load-event.html.ini          |    6 -
 .../failure-check-sequence.https.html.ini     |    9 +-
 ...url-return-value-handling-dynamic.html.ini |    3 +
 ...tion-unload-cross-origin.sub.window.js.ini |    3 +
 ...avigation-unload-same-origin.window.js.ini |    3 +
 .../replace-before-load/a-click.html.ini      |    3 +
 .../pageload-image-in-popup.html.ini          |    3 -
 .../traverse_the_history_5.html.ini           |    3 +
 .../canvas.2d.disconnected.html.ini           |    2 +-
 ...FilterObject.dropShadow.tentative.html.ini |    2 -
 .../html/dom/idlharness.https.html.ini        |  267 +++
 .../http-equiv-and-name-1.html.ini            |    3 +
 .../http-equiv-and-name-2.html.ini            |    3 +
 .../http-equiv-and-name.html.ini              |    6 -
 .../iframe_sandbox_popups_escaping-2.html.ini |    1 -
 ...rame_sandbox_popups_nonescaping-1.html.ini |    3 +-
 .../non-active-document.html.ini              |    6 +
 ...mit-iframe-then-location-navigate.html.ini |    3 +
 .../htmlanchorelement_noopener.html.ini       |    3 -
 .../defer-script/async-script.html.ini        |    4 -
 ...le-event-handler-settings-objects.html.ini |    3 +
 .../event-handler-all-global-events.html.ini  |    9 +
 ...nt-handler-attributes-body-window.html.ini |    9 +
 ...andler-attributes-frameset-window.html.ini |    9 +
 ...andler-attributes-windowless-body.html.ini |    6 +
 ...ob-entry-different-function-realm.html.ini |    5 +-
 .../content-type-parsing.html.ini             |    4 +-
 .../resource-timing/idlharness.any.js.ini     |   12 +
 .../selection/idlharness.window.js.ini        |   15 +
 .../realtimeanalyser-fft-scaling.html.ini     |    1 -
 .../audiocontext-not-fully-active.html.ini    |    1 -
 .../webmessaging/with-ports/017.html.ini      |    4 -
 .../webmessaging/without-ports/018.html.ini   |    4 -
 ...s-3P-window.partitioned.tentative.html.ini |    4 +
 .../anchors/idlharness.https.window.js.ini    |    3 +
 .../webxr/idlharness.https.window.js.ini      |    6 +
 .../Worker/Worker-constructor.html.ini        |    2 +
 .../mozilla/meta/mozilla/scrollBy.html.ini    |    3 +
 .../.github/workflows/interfaces.yml          |    2 +-
 .../.github/workflows/regen_certs.yml         |    2 +-
 .../resources/reports.py                      |   16 +-
 ...ute_pressure_basic.tentative.https.any.js} |   21 +-
 ...e_pressure_basic.tentative.https.window.js |   35 -
 ...in_focus_control.tentative.https.window.js |   12 +-
 ...ssure_detached_iframe.tentative.https.html |   32 +-
 ...ressure_disconnect.tentative.https.any.js} |   16 +-
 ...connect_idempotent.tentative.https.any.js} |   16 +-
 ...onnect_immediately.tentative.https.any.js} |   28 +-
 ..._duplicate_updates.tentative.https.any.js} |    9 +-
 ...e_pressure_factors.tentative.https.any.js} |    8 +-
 ..._pressure_multiple.tentative.https.any.js} |   19 +-
 ...e_across_iframes.tentative.https.window.js |   40 -
 ..._observe_idempotent.tentative.https.any.js |   19 +
 ...serve_idempotent.tentative.https.window.js |   16 -
 ..._unobserve_failure.tentative.https.any.js} |   10 +-
 ...e_pressure_options.tentative.https.any.js} |    2 +
 ...ure_privacy_test.tentative.https.window.js |   10 +-
 ...in_focus_control.tentative.https.window.js |   14 +-
 ..._supported_sources.tentative.https.any.js} |    2 +
 ...ssure_take_records.tentative.https.any.js} |   14 +-
 ...pressure_timestamp.tentative.https.any.js} |    8 +-
 ...sure_update_toJSON.tentative.https.any.js} |    6 +-
 .../resources/observer-in-dedicated-worker.js |   10 -
 .../resources/observer-in-shared-worker.js    |   21 -
 .../resources/support-iframe.html             |    2 +-
 .../anchor-non-oof-inherit.html               |  117 +
 ...nchor-scroll-composited-scrolling-006.html |   61 +
 ...r-scroll-composited-scrolling-006-ref.html |   39 +
 .../display-none-dont-cancel.tentative.html   |  146 ++
 ...-attachment-fixed-inline-scrolled-ref.html |   23 +
 ...ound-attachment-fixed-inline-scrolled.html |   35 +
 .../css/css-break/overflow-clip-014.html      |   14 +
 .../css/css-break/overflow-clip-015.html      |   15 +
 .../css/css-break/overflow-clip-016.html      |   16 +
 .../css/css-break/overflow-clip-017.html      |   19 +
 .../css-cascade/import-conditional-001.html   |    2 +
 .../css/css-cascade/import-conditions.html    |   72 +-
 .../parsing/supports-import-parsing.html      |   74 +
 .../abspos/dynamic-align-self-001.html        |   46 +
 ...as-container-justify-center.tentative.html |   46 +
 .../flex-aspect-ratio-img-row-017.html        |   27 +
 .../css-flexbox/grandchild-span-height.html   |   32 +
 .../css/css-flexbox/grid-flex-item-007.html   |   30 +
 .../css/css-flexbox/justify-content-007.html  |   31 +
 .../table-as-flex-item-max-content.html       |   37 +
 .../subgrid/auto-track-sizing-001-ref.html    |    4 +-
 .../subgrid/auto-track-sizing-001.html        |    4 +-
 .../independent-formatting-context-ref.html   |   22 +-
 .../independent-formatting-context.html       |   48 +-
 .../image-orientation-none-cross-origin.html  |   30 +-
 ...age-orientation-none-cross-origin-ref.html |   15 +-
 .../text-box-trim/text-box-trim-valid.html    |    2 +-
 .../overlay/overlay-computed.html             |   19 +
 .../css-position/overlay/overlay-invalid.html |   15 +
 .../overlay/overlay-transition-property.html  |   15 +
 .../css-position/overlay/overlay-valid.html   |   15 +
 .../root-element-cv-hidden-crash.html         |   11 +
 .../scripting-print-noscript-ref.html         |    4 +
 .../scripting-print-noscript.html             |   13 +
 .../scripting-print-script-ref.html           |    4 +
 .../mediaqueries/scripting-print-script.html  |   17 +
 .../css/mediaqueries/scripting.html           |   26 +
 .../i18n/css3-selectors-lang-014.html         |    4 +-
 .../selectors/selectors-4/lang-000-ref.html   |   11 +
 .../css/selectors/selectors-4/lang-000.html   |   13 +
 .../css/selectors/selectors-4/lang-001.html   |   14 +
 .../css/selectors/selectors-4/lang-002.html   |   14 +
 .../css/selectors/selectors-4/lang-003.html   |   14 +
 .../css/selectors/selectors-4/lang-004.html   |   14 +
 .../css/selectors/selectors-4/lang-005.html   |   14 +
 .../css/selectors/selectors-4/lang-006.html   |   14 +
 .../css/selectors/selectors-4/lang-007.html   |   14 +
 .../css/selectors/selectors-4/lang-008.html   |   14 +
 .../css/selectors/selectors-4/lang-009.html   |   14 +
 .../css/selectors/selectors-4/lang-010.html   |   14 +
 .../css/selectors/selectors-4/lang-011.html   |   14 +
 .../css/selectors/selectors-4/lang-012.html   |   14 +
 .../css/selectors/selectors-4/lang-013.html   |   14 +
 .../css/selectors/selectors-4/lang-014.html   |   14 +
 .../css/selectors/selectors-4/lang-015.html   |   14 +
 ...d-to-element-with-overscroll-behavior.html |  223 +-
 ...eave-ad-interest-group.https.sub.window.js |    8 +-
 .../FileSystemBaseHandle-IndexedDB.js         |   24 +
 ...-request-fullscreen-screen-size.https.html |   63 +
 ...ilterObject.blur.exceptions.tentative.html |   12 +-
 ...vasFilterObject.colorMatrix.tentative.html |   34 +-
 ....componentTransfer.discrete.tentative.html |    8 +-
 ...ect.componentTransfer.gamma.tentative.html |    8 +-
 ....componentTransfer.identity.tentative.html |    8 +-
 ...ct.componentTransfer.linear.tentative.html |    8 +-
 ...ect.componentTransfer.table.tentative.html |    8 +-
 ...t.convolveMatrix.exceptions.tentative.html |   32 +-
 ...rObject.dropShadow.tentative-expected.html |   92 +-
 ...nvasFilterObject.dropShadow.tentative.html |   42 +-
 ...d.filter.canvasFilterObject.tentative.html |   10 +-
 ...bject.turbulence.inputTypes.tentative.html |   32 +-
 ...ilterObject.blur.exceptions.tentative.html |   12 +-
 ...Object.blur.exceptions.tentative.worker.js |   12 +-
 ...vasFilterObject.colorMatrix.tentative.html |   34 +-
 ...lterObject.colorMatrix.tentative.worker.js |   34 +-
 ....componentTransfer.discrete.tentative.html |    8 +-
 ...onentTransfer.discrete.tentative.worker.js |    8 +-
 ...ect.componentTransfer.gamma.tentative.html |    8 +-
 ...omponentTransfer.gamma.tentative.worker.js |    8 +-
 ....componentTransfer.identity.tentative.html |    8 +-
 ...onentTransfer.identity.tentative.worker.js |    8 +-
 ...ct.componentTransfer.linear.tentative.html |    8 +-
 ...mponentTransfer.linear.tentative.worker.js |    8 +-
 ...ect.componentTransfer.table.tentative.html |    8 +-
 ...omponentTransfer.table.tentative.worker.js |    8 +-
 ...t.convolveMatrix.exceptions.tentative.html |   32 +-
 ...volveMatrix.exceptions.tentative.worker.js |   32 +-
 ...rObject.dropShadow.tentative-expected.html |   92 +-
 ...nvasFilterObject.dropShadow.tentative.html |   42 +-
 ...asFilterObject.dropShadow.tentative.w.html |   42 +-
 ...d.filter.canvasFilterObject.tentative.html |   10 +-
 ...ter.canvasFilterObject.tentative.worker.js |   10 +-
 ...bject.turbulence.inputTypes.tentative.html |   32 +-
 ....turbulence.inputTypes.tentative.worker.js |   32 +-
 .../html/canvas/tools/yaml-new/filters.yaml   |  304 ++-
 ...d-name.html => http-equiv-and-name-1.html} |   11 +-
 .../http-equiv-and-name-2.html                |   13 +
 ...trary-content-displayed-ref.tentative.html |   14 +-
 ...arbitrary-content-displayed.tentative.html |    4 +-
 .../support/fake-selectmenu.js                |   12 +-
 .../webtransport-h3.https.sub.any.js.ini      |   22 +-
 .../testdriver/actions/wheelScroll.html.ini   |    2 +-
 .../interfaces/EXT_clip_cull_distance.idl     |   20 -
 .../web-platform-tests/interfaces/FedCM.idl   |   88 +-
 .../interfaces/WEBGL_clip_cull_distance.idl   |   20 +
 .../interfaces/WEBGL_provoking_vertex.idl     |   13 +
 .../web-platform-tests/interfaces/anchors.idl |    2 +
 .../web-platform-tests/interfaces/badging.idl |   10 +-
 .../interfaces/compression.idl                |   10 +-
 .../interfaces/compute-pressure.idl           |    7 +-
 .../interfaces/contact-picker.idl             |    2 +-
 .../interfaces/cookie-store.idl               |    4 +-
 .../interfaces/css-cascade-6.idl              |   10 +
 .../interfaces/css-contain.idl                |    6 +-
 .../interfaces/css-typed-om.idl               |    4 +-
 .../interfaces/css-view-transitions.idl       |    8 +-
 .../interfaces/device-posture.idl             |    3 +-
 .../wpt/web-platform-tests/interfaces/dom.idl |    2 +-
 .../interfaces/edit-context.idl               |   40 +-
 .../interfaces/fenced-frame.idl               |   54 +
 .../web-platform-tests/interfaces/fetch.idl   |    1 +
 .../wpt/web-platform-tests/interfaces/fs.idl  |    4 -
 .../interfaces/gamepad-extensions.idl         |    2 +-
 .../interfaces/gpc-spec.idl                   |   10 +
 .../web-platform-tests/interfaces/html.idl    |   32 +-
 .../interfaces/mediacapture-streams.idl       |   10 +-
 .../interfaces/navigation-api.idl             |  158 --
 .../interfaces/notifications.idl              |    1 -
 .../interfaces/orientation-event.idl          |    4 -
 .../interfaces/permissions-policy.idl         |    1 -
 .../interfaces/priority-hints.idl             |   20 -
 .../interfaces/requestStorageAccessFor.idl    |   12 +
 .../interfaces/resource-timing.idl            |    1 +
 .../interfaces/scroll-animations.idl          |    1 +
 .../interfaces/scroll-to-text-fragment.idl    |    2 +-
 .../secure-payment-confirmation.idl           |   11 -
 .../interfaces/selection-api.idl              |    3 +-
 .../interfaces/trust-token-api.idl            |   29 +
 .../interfaces/turtledove.idl                 |  109 +
 .../interfaces/ua-client-hints.idl            |    7 +-
 .../wpt/web-platform-tests/interfaces/url.idl |    4 +
 .../interfaces/wasm-js-api.idl                |   12 +-
 .../interfaces/web-animations-2.idl           |   11 +
 .../interfaces/web-animations.idl             |    1 -
 .../interfaces/web-bluetooth.idl              |    1 +
 .../interfaces/webauthn.idl                   |   42 +-
 .../webcodecs-av1-codec-registration.idl      |   12 +
 .../webcodecs-vp9-codec-registration.idl      |   12 +
 .../interfaces/webcodecs.idl                  |   16 +-
 .../web-platform-tests/interfaces/webgpu.idl  |   68 +-
 .../web-platform-tests/interfaces/webidl.idl  |    2 -
 .../web-platform-tests/interfaces/webnn.idl   |   25 +-
 .../interfaces/webrtc-encoded-transform.idl   |    1 +
 .../interfaces/webrtc-stats.idl               |    2 +-
 .../web-platform-tests/interfaces/webrtc.idl  |   55 +-
 .../interfaces/webtransport.idl               |   20 +-
 .../web-platform-tests/interfaces/webxr.idl   |    1 +
 ...ow-placement.idl => window-management.idl} |    2 +-
 .../wpt/web-platform-tests/interfaces/xhr.idl |    2 +-
 .../tentative/loaf-blocking-duration.html     |   57 +
 .../tentative/loaf-toJSON.html                |    4 +-
 .../utils/peerconnection.js                   |    4 +-
 ...ment-crossorigin-sameorigindomain.sub.html |    4 +-
 .../click-crossdocument-sameorigin.html       |    4 +-
 ...ment-crossorigin-sameorigindomain.sub.html |    4 +-
 .../click-samedocument-crossorigin.html       |    4 +-
 .../click-samedocument-sameorigin.html        |    4 +-
 ...ment-crossorigin-sameorigindomain.sub.html |    4 +-
 .../location-crossdocument-sameorigin.html    |    4 +-
 ...ment-crossorigin-sameorigindomain.sub.html |    4 +-
 .../location-samedocument-crossorigin.html    |    4 +-
 .../location-samedocument-sameorigin.html     |    4 +-
 ...ment-crossorigin-sameorigindomain.sub.html |    4 +-
 .../open-crossdocument-sameorigin.html        |    4 +-
 ...ment-crossorigin-sameorigindomain.sub.html |    4 +-
 .../open-samedocument-crossorigin.html        |    4 +-
 .../open-samedocument-sameorigin.html         |    4 +-
 ...ment-crossorigin-sameorigindomain.sub.html |    4 +-
 .../submit-crossdocument-sameorigin.html      |    4 +-
 ...ment-crossorigin-sameorigindomain.sub.html |    4 +-
 .../submit-samedocument-crossorigin.html      |    4 +-
 .../submit-samedocument-sameorigin.html       |    4 +-
 .../navigate-anchor-cross-origin.html         |    4 +-
 ...avigate-anchor-download-userInitiated.html |    4 +-
 .../navigate-anchor-download.html             |    4 +-
 .../navigate-anchor-fragment.html             |    4 +-
 ...ate-anchor-same-origin-cross-document.html |    4 +-
 .../navigate-anchor-userInitiated.html        |    4 +-
 .../navigate-anchor-with-target.html          |    4 +-
 .../navigate-destination-after-detach.html    |   33 +
 .../navigate-destination-dynamic-index.html   |   34 +
 ...ate-destination-getState-back-forward.html |    4 +-
 ...avigate-destination-getState-navigate.html |    4 +-
 .../navigate-destination-getState-reload.html |    4 +-
 .../navigate-event/navigate-form-get.html     |    4 +-
 .../navigate-form-userInitiated.html          |    4 +-
 .../navigate-form-with-target.html            |    4 +-
 .../navigate-event/navigate-form.html         |    4 +-
 .../navigate-event/navigate-history-go-0.html |    4 +-
 .../navigate-history-pushState.html           |    4 +-
 .../navigate-history-replaceState.html        |    4 +-
 .../navigate-iframe-location.html             |    4 +-
 .../navigate-event/navigate-location.html     |    4 +-
 .../navigate-event/navigate-meta-refresh.html |    4 +-
 .../navigate-navigation-navigate.html         |    4 +-
 .../navigate-event/navigate-to-srcdoc.html    |    4 +-
 .../navigate-window-open-self.html            |    4 +-
 .../navigate-event/navigate-window-open.html  |    4 +-
 .../resources/window_state_context.js         |   20 +-
 .../visibility-state-entry.tentative.html     |   62 +-
 .../chromium/mock-pressure-service.js         |   43 +-
 .../resources/chromium/mock-subapps.js        |    7 +-
 .../orientation-reading.html                  |  169 +-
 .../animation-duration-auto.tentative.html    |    6 +-
 ...oll-timeline-specified-scroller-print.html |    2 +-
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 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/__init__.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/invalid.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/__init__.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/context.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/invalid.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/release.py
 create mode 100644 tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/sequence.py
 delete mode 100644 tests/wpt/web-platform-tests/webdriver/tests/release_actions/support/test_actions_wdspec.html
 create mode 100644 tests/wpt/web-platform-tests/webnn/resources/test_data/softsign.json
 create mode 100644 tests/wpt/web-platform-tests/webnn/softsign.https.any.js
 delete mode 100644 tests/wpt/web-platform-tests/webtransport/close.https.any.js.ini
 delete mode 100644 tests/wpt/web-platform-tests/webtransport/connect.https.any.js.ini
 delete mode 100644 tests/wpt/web-platform-tests/webtransport/csp-fail.https.window.js.ini
 delete mode 100644 tests/wpt/web-platform-tests/webtransport/csp-pass.https.window.js.ini
 delete mode 100644 tests/wpt/web-platform-tests/webtransport/datagrams.https.any.js.ini
 delete mode 100644 tests/wpt/web-platform-tests/webtransport/streams-close.https.any.js.ini
 delete mode 100644 tests/wpt/web-platform-tests/webtransport/streams-echo.https.any.js.ini

diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-003.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-003.xht.ini
new file mode 100644
index 00000000000..a7c02218dae
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-003.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-height-003.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-004.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-004.xht.ini
new file mode 100644
index 00000000000..d5edb75b0ee
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-004.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-height-004.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-005.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-005.xht.ini
new file mode 100644
index 00000000000..acbe4a16f4d
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-005.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-height-005.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-010.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-010.xht.ini
new file mode 100644
index 00000000000..ffa0aa5f51d
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-010.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-height-010.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-011.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-011.xht.ini
new file mode 100644
index 00000000000..ff562b47bae
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-011.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-height-011.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-012.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-012.xht.ini
new file mode 100644
index 00000000000..5cd0779a01b
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-height-012.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-height-012.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-004.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-004.xht.ini
new file mode 100644
index 00000000000..520f8f51740
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-004.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-max-height-004.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-005.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-005.xht.ini
new file mode 100644
index 00000000000..f0a70485254
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-005.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-max-height-005.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-006.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-006.xht.ini
new file mode 100644
index 00000000000..b49a7b20e06
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-006.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-max-height-006.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-010.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-010.xht.ini
new file mode 100644
index 00000000000..26bf546864a
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-010.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-max-height-010.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-012.xht.ini b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-012.xht.ini
new file mode 100644
index 00000000000..bbeee78f08a
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/CSS2/positioning/absolute-non-replaced-max-height-012.xht.ini
@@ -0,0 +1,2 @@
+[absolute-non-replaced-max-height-012.xht]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-animations/display-none-dont-cancel.tentative.html.ini b/tests/wpt/metadata-layout-2020/css/css-animations/display-none-dont-cancel.tentative.html.ini
new file mode 100644
index 00000000000..0ac75b5ef27
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-animations/display-none-dont-cancel.tentative.html.ini
@@ -0,0 +1,15 @@
+[display-none-dont-cancel.tentative.html]
+  [display:none animating to display:inline should be inline for the whole animation.]
+    expected: FAIL
+
+  [A CSS variable of display:none animating to display:inline should be inline for the whole animation.]
+    expected: FAIL
+
+  [Animating from display:none to display:none should not cancel the animation.]
+    expected: FAIL
+
+  [Animating from display:none to display:none with an intermediate variable should not cancel the animation.]
+    expected: FAIL
+
+  [Animating a variable of "none" which gets set to display elsewhere should not cancel the animation.]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html.ini b/tests/wpt/metadata-layout-2020/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html.ini
new file mode 100644
index 00000000000..2789084260c
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html.ini
@@ -0,0 +1,2 @@
+[background-attachment-fixed-inline-scrolled.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-flexbox/abspos/position-absolute-013.html.ini b/tests/wpt/metadata-layout-2020/css/css-flexbox/abspos/position-absolute-013.html.ini
index d4f9786638e..0c429395c15 100644
--- a/tests/wpt/metadata-layout-2020/css/css-flexbox/abspos/position-absolute-013.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-flexbox/abspos/position-absolute-013.html.ini
@@ -964,159 +964,3 @@
 
   [.flexbox 129]
     expected: FAIL
-
-  [.flexbox 10]
-    expected: FAIL
-
-  [.flexbox 12]
-    expected: FAIL
-
-  [.flexbox 20]
-    expected: FAIL
-
-  [.flexbox 31]
-    expected: FAIL
-
-  [.flexbox 33]
-    expected: FAIL
-
-  [.flexbox 47]
-    expected: FAIL
-
-  [.flexbox 58]
-    expected: FAIL
-
-  [.flexbox 60]
-    expected: FAIL
-
-  [.flexbox 68]
-    expected: FAIL
-
-  [.flexbox 79]
-    expected: FAIL
-
-  [.flexbox 81]
-    expected: FAIL
-
-  [.flexbox 95]
-    expected: FAIL
-
-  [.flexbox 107]
-    expected: FAIL
-
-  [.flexbox 115]
-    expected: FAIL
-
-  [.flexbox 117]
-    expected: FAIL
-
-  [.flexbox 128]
-    expected: FAIL
-
-  [.flexbox 142]
-    expected: FAIL
-
-  [.flexbox 144]
-    expected: FAIL
-
-  [.flexbox 155]
-    expected: FAIL
-
-  [.flexbox 167]
-    expected: FAIL
-
-  [.flexbox 176]
-    expected: FAIL
-
-  [.flexbox 188]
-    expected: FAIL
-
-  [.flexbox 203]
-    expected: FAIL
-
-  [.flexbox 215]
-    expected: FAIL
-
-  [.flexbox 224]
-    expected: FAIL
-
-  [.flexbox 236]
-    expected: FAIL
-
-  [.flexbox 250]
-    expected: FAIL
-
-  [.flexbox 252]
-    expected: FAIL
-
-  [.flexbox 262]
-    expected: FAIL
-
-  [.flexbox 264]
-    expected: FAIL
-
-  [.flexbox 271]
-    expected: FAIL
-
-  [.flexbox 273]
-    expected: FAIL
-
-  [.flexbox 283]
-    expected: FAIL
-
-  [.flexbox 285]
-    expected: FAIL
-
-  [.flexbox 298]
-    expected: FAIL
-
-  [.flexbox 300]
-    expected: FAIL
-
-  [.flexbox 308]
-    expected: FAIL
-
-  [.flexbox 319]
-    expected: FAIL
-
-  [.flexbox 321]
-    expected: FAIL
-
-  [.flexbox 335]
-    expected: FAIL
-
-  [.flexbox 346]
-    expected: FAIL
-
-  [.flexbox 348]
-    expected: FAIL
-
-  [.flexbox 356]
-    expected: FAIL
-
-  [.flexbox 367]
-    expected: FAIL
-
-  [.flexbox 369]
-    expected: FAIL
-
-  [.flexbox 383]
-    expected: FAIL
-
-  [.flexbox 395]
-    expected: FAIL
-
-  [.flexbox 403]
-    expected: FAIL
-
-  [.flexbox 405]
-    expected: FAIL
-
-  [.flexbox 416]
-    expected: FAIL
-
-  [.flexbox 430]
-    expected: FAIL
-
-  [.flexbox 432]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-flexbox/justify-content-007.html.ini b/tests/wpt/metadata-layout-2020/css/css-flexbox/justify-content-007.html.ini
new file mode 100644
index 00000000000..ea29b95ecec
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-flexbox/justify-content-007.html.ini
@@ -0,0 +1,3 @@
+[justify-content-007.html]
+  [.flexitem + .flexitem 1]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-flexbox/table-as-flex-item-max-content.html.ini b/tests/wpt/metadata-layout-2020/css/css-flexbox/table-as-flex-item-max-content.html.ini
new file mode 100644
index 00000000000..0757e0f9b55
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-flexbox/table-as-flex-item-max-content.html.ini
@@ -0,0 +1,2 @@
+[table-as-flex-item-max-content.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-fonts/variations/font-weight-matching.html.ini b/tests/wpt/metadata-layout-2020/css/css-fonts/variations/font-weight-matching.html.ini
index 5aa97a62ffc..2aa858c8719 100644
--- a/tests/wpt/metadata-layout-2020/css/css-fonts/variations/font-weight-matching.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-fonts/variations/font-weight-matching.html.ini
@@ -40,4 +40,3 @@
 
   [Test @font-face matching for weight 420]
     expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-computed.html.ini b/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-computed.html.ini
new file mode 100644
index 00000000000..cc0692d0132
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-computed.html.ini
@@ -0,0 +1,18 @@
+[overlay-computed.html]
+  [Property overlay value 'none']
+    expected: FAIL
+
+  [Property overlay value 'auto']
+    expected: FAIL
+
+  [Property overlay value 'inherit']
+    expected: FAIL
+
+  [Property overlay value 'initial']
+    expected: FAIL
+
+  [Property overlay value 'revert']
+    expected: FAIL
+
+  [Property overlay value 'unset']
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-transition-property.html.ini b/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-transition-property.html.ini
new file mode 100644
index 00000000000..aacfbd3b035
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-transition-property.html.ini
@@ -0,0 +1,3 @@
+[overlay-transition-property.html]
+  [Property transition value 'overlay 1s']
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-valid.html.ini b/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-valid.html.ini
new file mode 100644
index 00000000000..5c27614af3c
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/css-position/overlay/overlay-valid.html.ini
@@ -0,0 +1,18 @@
+[overlay-valid.html]
+  [e.style['overlay'\] = "none" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "auto" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "inherit" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "initial" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "revert" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "unset" should set the property value]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-002.html.ini b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-002.html.ini
index 56b0fa56d4b..17c3b71eca7 100644
--- a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-002.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-002.html.ini
@@ -4,3 +4,27 @@
 
   [vertical-align vertical(keyword) / events]
     expected: FAIL
+
+  [margin-bottom percentage(%) / values]
+    expected: FAIL
+
+  [margin-left percentage(%) / values]
+    expected: FAIL
+
+  [margin-right percentage(%) / values]
+    expected: FAIL
+
+  [margin-top percentage(%) / values]
+    expected: FAIL
+
+  [padding-bottom percentage(%) / values]
+    expected: FAIL
+
+  [padding-left percentage(%) / values]
+    expected: FAIL
+
+  [padding-right percentage(%) / values]
+    expected: FAIL
+
+  [padding-top percentage(%) / values]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-001.html.ini b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-001.html.ini
index 1f5e357c51f..719b9b6ff15 100644
--- a/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-001.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-transitions/properties-value-inherit-001.html.ini
@@ -544,153 +544,3 @@
 
   [margin-right length(mm) / events]
     expected: FAIL
-
-  [margin-right length(cm) / events]
-    expected: FAIL
-
-  [margin-right length(in) / events]
-    expected: FAIL
-
-  [margin-top length(pt) / events]
-    expected: FAIL
-
-  [margin-top length(pc) / events]
-    expected: FAIL
-
-  [margin-top length(px) / events]
-    expected: FAIL
-
-  [margin-top length(em) / events]
-    expected: FAIL
-
-  [margin-top length(ex) / events]
-    expected: FAIL
-
-  [margin-top length(mm) / events]
-    expected: FAIL
-
-  [margin-top length(cm) / events]
-    expected: FAIL
-
-  [margin-top length(in) / events]
-    expected: FAIL
-
-  [height length(pt) / events]
-    expected: FAIL
-
-  [height length(pc) / events]
-    expected: FAIL
-
-  [height length(px) / events]
-    expected: FAIL
-
-  [height length(em) / events]
-    expected: FAIL
-
-  [height length(ex) / events]
-    expected: FAIL
-
-  [height length(mm) / events]
-    expected: FAIL
-
-  [height length(cm) / events]
-    expected: FAIL
-
-  [height length(in) / events]
-    expected: FAIL
-
-  [height percentage(%) / events]
-    expected: FAIL
-
-  [width length(pt) / events]
-    expected: FAIL
-
-  [width length(pc) / events]
-    expected: FAIL
-
-  [width length(px) / events]
-    expected: FAIL
-
-  [width length(em) / events]
-    expected: FAIL
-
-  [width length(ex) / events]
-    expected: FAIL
-
-  [width length(mm) / events]
-    expected: FAIL
-
-  [width length(cm) / events]
-    expected: FAIL
-
-  [width length(in) / events]
-    expected: FAIL
-
-  [width percentage(%) / events]
-    expected: FAIL
-
-  [min-height length(pt) / events]
-    expected: FAIL
-
-  [min-height length(pc) / events]
-    expected: FAIL
-
-  [min-height length(px) / events]
-    expected: FAIL
-
-  [min-height length(em) / events]
-    expected: FAIL
-
-  [min-height length(ex) / events]
-    expected: FAIL
-
-  [min-height length(mm) / events]
-    expected: FAIL
-
-  [min-height length(cm) / events]
-    expected: FAIL
-
-  [min-height length(in) / events]
-    expected: FAIL
-
-  [min-height percentage(%) / events]
-    expected: FAIL
-
-  [min-width length(pt) / events]
-    expected: FAIL
-
-  [min-width length(pc) / events]
-    expected: FAIL
-
-  [min-width length(px) / events]
-    expected: FAIL
-
-  [min-width length(em) / events]
-    expected: FAIL
-
-  [min-width length(ex) / events]
-    expected: FAIL
-
-  [min-width length(mm) / events]
-    expected: FAIL
-
-  [min-width length(cm) / events]
-    expected: FAIL
-
-  [min-width length(in) / events]
-    expected: FAIL
-
-  [min-width percentage(%) / events]
-    expected: FAIL
-
-  [max-height length(pt) / events]
-    expected: FAIL
-
-  [max-height length(pc) / events]
-    expected: FAIL
-
-  [max-height length(px) / events]
-    expected: FAIL
-
-  [max-height length(em) / events]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
index cf67b5d03dd..80ed711305d 100644
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPoint-dynamic-anon-box.html.ini
@@ -1,3 +1,4 @@
 [elementFromPoint-dynamic-anon-box.html]
+  expected: CRASH
   [Link should be clickable after hiding a scrollbox with an anonymous table inside]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
index fef9ce7fc04..1a06450c5c1 100644
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementFromPosition.html.ini
@@ -16,3 +16,6 @@
 
   [test some point of the element: top left corner]
     expected: FAIL
+
+  [test the top of layer]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/elementsFromPoint-iframes.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/elementsFromPoint-iframes.html.ini
index 314c2710dc9..78f6aab8d85 100644
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/elementsFromPoint-iframes.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/cssom-view/elementsFromPoint-iframes.html.ini
@@ -1,3 +1,6 @@
 [elementsFromPoint-iframes.html]
   [elementsFromPoint on the root document for points in iframe elements]
     expected: FAIL
+
+  [elementsFromPoint on inner documents]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/selectors/selectors-4/lang-011.html.ini b/tests/wpt/metadata-layout-2020/css/selectors/selectors-4/lang-011.html.ini
new file mode 100644
index 00000000000..b168bf5cd3a
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/selectors/selectors-4/lang-011.html.ini
@@ -0,0 +1,2 @@
+[lang-011.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/css/selectors/selectors-4/lang-012.html.ini b/tests/wpt/metadata-layout-2020/css/selectors/selectors-4/lang-012.html.ini
new file mode 100644
index 00000000000..cdc6bafba43
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/selectors/selectors-4/lang-012.html.ini
@@ -0,0 +1,2 @@
+[lang-012.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
index 8edde75f4d0..df1b6f0e51b 100644
--- a/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
@@ -186,9 +186,6 @@
   [fetch(): separate response Content-Type: text/plain;charset=gbk text/plain]
     expected: NOTRUN
 
-  [Request: combined response Content-Type:  text/plain]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/plain ]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/fetch/metadata/generated/element-img-environment-change.sub.html.ini b/tests/wpt/metadata-layout-2020/fetch/metadata/generated/element-img-environment-change.sub.html.ini
index 3b66eaffa45..3ec67be350a 100644
--- a/tests/wpt/metadata-layout-2020/fetch/metadata/generated/element-img-environment-change.sub.html.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/metadata/generated/element-img-environment-change.sub.html.ini
@@ -4,10 +4,10 @@
     expected: FAIL
 
   [sec-fetch-site - Not sent to non-trustworthy same-site destination, no attributes]
-    expected: FAIL
+    expected: TIMEOUT
 
   [sec-fetch-site - Not sent to non-trustworthy cross-site destination, no attributes]
-    expected: TIMEOUT
+    expected: NOTRUN
 
   [sec-fetch-mode - Not sent to non-trustworthy same-origin destination, no attributes]
     expected: NOTRUN
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/005.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/005.html.ini
index 33efcdbcf48..f7ee5361549 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/005.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/005.html.ini
@@ -1,3 +1,4 @@
 [005.html]
+  expected: TIMEOUT
   [Link with onclick navigation and href navigation ]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
index 856bb1c9901..dc1144214ef 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/initial-empty-document/iframe-src-aboutblank-navigate-immediately.html.ini
@@ -1,10 +1,9 @@
 [iframe-src-aboutblank-navigate-immediately.html]
-  expected: TIMEOUT
   [Navigating to a different document with window.open]
     expected: FAIL
 
   [Navigating to a different document with form submission]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Navigating to a different document with link click]
     expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
index 78240a2f463..8ae58f9f1e2 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
@@ -16,3 +16,6 @@
 
   [D83D DE0D set in href="" targeting a frame and clicked]
     expected: FAIL
+
+  [DE0D 0041 set in href="" targeting a frame and clicked]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
new file mode 100644
index 00000000000..60a4fa51f8a
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
@@ -0,0 +1,3 @@
+[a-click.html]
+  [aElement.click() before the load event must NOT replace]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini
index 9df06805f99..613bed9352d 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini
@@ -1,5 +1,5 @@
 [embedded-opener-remove-frame.html]
-  expected: TIMEOUT
+  expected: CRASH
   [opener of discarded nested browsing context]
     expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html.ini b/tests/wpt/metadata-layout-2020/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html.ini
deleted file mode 100644
index 5ff0d0fdbbc..00000000000
--- a/tests/wpt/metadata-layout-2020/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[2d.filter.canvasFilterObject.dropShadow.tentative.html]
-  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/dom/idlharness.https.html.ini b/tests/wpt/metadata-layout-2020/html/dom/idlharness.https.html.ini
index 53443fb1a84..a96b906711a 100644
--- a/tests/wpt/metadata-layout-2020/html/dom/idlharness.https.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/dom/idlharness.https.html.ini
@@ -1463,6 +1463,45 @@
   [SVGElement interface: attribute onscrollend]
     expected: FAIL
 
+  [ToggleEvent interface: existence and properties of interface object]
+    expected: FAIL
+
+  [ToggleEvent interface object length]
+    expected: FAIL
+
+  [ToggleEvent interface object name]
+    expected: FAIL
+
+  [ToggleEvent interface: existence and properties of interface prototype object]
+    expected: FAIL
+
+  [ToggleEvent interface: existence and properties of interface prototype object's "constructor" property]
+    expected: FAIL
+
+  [ToggleEvent interface: existence and properties of interface prototype object's @@unscopables property]
+    expected: FAIL
+
+  [ToggleEvent interface: attribute oldState]
+    expected: FAIL
+
+  [ToggleEvent interface: attribute newState]
+    expected: FAIL
+
+  [ToggleEvent must be primary interface of new ToggleEvent("beforetoggle")]
+    expected: FAIL
+
+  [Stringification of new ToggleEvent("beforetoggle")]
+    expected: FAIL
+
+  [ToggleEvent interface: new ToggleEvent("beforetoggle") must inherit property "oldState" with the proper type]
+    expected: FAIL
+
+  [ToggleEvent interface: new ToggleEvent("beforetoggle") must inherit property "newState" with the proper type]
+    expected: FAIL
+
+  [SVGElement interface: attribute onbeforetoggle]
+    expected: FAIL
+
 
 [idlharness.https.html?include=(Document|Window)]
   [Document interface: documentWithHandlers must inherit property "queryCommandEnabled(DOMString)" with the proper type]
@@ -1567,9 +1606,6 @@
   [Document interface: documentWithHandlers must inherit property "onsecuritypolicyviolation" with the proper type]
     expected: FAIL
 
-  [Window interface: existence and properties of interface prototype object]
-    expected: FAIL
-
   [Window interface: operation focus()]
     expected: FAIL
 
@@ -2047,6 +2083,24 @@
   [Window interface: window must inherit property "onpaste" with the proper type]
     expected: FAIL
 
+  [Window interface: attribute onbeforetoggle]
+    expected: FAIL
+
+  [Window interface: window must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
+  [Document interface: attribute onbeforetoggle]
+    expected: FAIL
+
+  [Document interface: iframe.contentDocument must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
+  [Document interface: new Document() must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
+  [Document interface: documentWithHandlers must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
 
 [idlharness.https.html?include=HTML.*]
   [HTMLTableSectionElement interface: document.createElement("tfoot") must inherit property "align" with the proper type]
@@ -4025,3 +4079,213 @@
 
   [HTMLScriptElement interface: document.createElement("script") must inherit property "blocking" with the proper type]
     expected: FAIL
+
+  [HTMLElement interface: operation showPopover()]
+    expected: FAIL
+
+  [HTMLElement interface: operation hidePopover()]
+    expected: FAIL
+
+  [HTMLElement interface: operation togglePopover(optional boolean)]
+    expected: FAIL
+
+  [HTMLElement interface: attribute popover]
+    expected: FAIL
+
+  [HTMLElement interface: attribute onbeforetoggle]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "showPopover()" with the proper type]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "hidePopover()" with the proper type]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "togglePopover(optional boolean)" with the proper type]
+    expected: FAIL
+
+  [HTMLElement interface: calling togglePopover(optional boolean) on document.createElement("noscript") with too few arguments must throw TypeError]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "popover" with the proper type]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
+  [HTMLLinkElement interface: attribute fetchPriority]
+    expected: FAIL
+
+  [HTMLLinkElement interface: document.createElement("link") must inherit property "fetchPriority" with the proper type]
+    expected: FAIL
+
+  [HTMLImageElement interface: attribute fetchPriority]
+    expected: FAIL
+
+  [HTMLImageElement interface: document.createElement("img") must inherit property "fetchPriority" with the proper type]
+    expected: FAIL
+
+  [HTMLImageElement interface: new Image() must inherit property "fetchPriority" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: attribute popoverTargetElement]
+    expected: FAIL
+
+  [HTMLInputElement interface: attribute popoverTargetAction]
+    expected: FAIL
+
+  [HTMLInputElement interface: document.createElement("input") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: document.createElement("input") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("text") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("text") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("hidden") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("hidden") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("search") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("search") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("tel") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("tel") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("url") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("url") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("email") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("email") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("password") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("password") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("date") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("date") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("month") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("month") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("week") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("week") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("time") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("time") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("datetime-local") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("datetime-local") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("number") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("number") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("range") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("range") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("color") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("color") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("checkbox") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("checkbox") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("radio") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("radio") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("file") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("file") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("submit") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("submit") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("image") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("image") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("reset") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("reset") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("button") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("button") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLButtonElement interface: attribute popoverTargetElement]
+    expected: FAIL
+
+  [HTMLButtonElement interface: attribute popoverTargetAction]
+    expected: FAIL
+
+  [HTMLButtonElement interface: document.createElement("button") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLButtonElement interface: document.createElement("button") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLScriptElement interface: attribute fetchPriority]
+    expected: FAIL
+
+  [HTMLScriptElement interface: document.createElement("script") must inherit property "fetchPriority" with the proper type]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/document-with-fragment-nonexistent.html.ini b/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/document-with-fragment-nonexistent.html.ini
index 59e7bc11784..a10be12e8cc 100644
--- a/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/document-with-fragment-nonexistent.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/interaction/focus/the-autofocus-attribute/document-with-fragment-nonexistent.html.ini
@@ -1,7 +1,7 @@
 [document-with-fragment-nonexistent.html]
+  expected: TIMEOUT
   [Autofocus elements in iframed documents with non-existent fragments should work.]
     expected: FAIL
 
   [Autofocus elements in top-level browsing context's documents with non-existent fragments should work.]
-    expected: FAIL
-
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html.ini
new file mode 100644
index 00000000000..27c12573f11
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html.ini
@@ -0,0 +1,3 @@
+[http-equiv-and-name-1.html]
+  [<meta> set the color-scheme to dark]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html.ini
new file mode 100644
index 00000000000..def16bc1f29
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html.ini
@@ -0,0 +1,3 @@
+[http-equiv-and-name-2.html]
+  [<meta> set the content-language to de-DE]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
new file mode 100644
index 00000000000..09c049e4b58
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/media-elements/media_fragment_seek.html.ini
@@ -0,0 +1,3 @@
+[media_fragment_seek.html]
+  [Video should seek to time specified in media fragment syntax]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 7d28d586f51..24903b5f66f 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
@@ -1,3 +1,4 @@
 [iframe_sandbox_popups_escaping-1.html]
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
index 26704422bbe..841bafc6eca 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
@@ -1,4 +1,3 @@
 [iframe_sandbox_popups_escaping-2.html]
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: TIMEOUT
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index 6a420504feb..7da2bc5ac80 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,3 +1,4 @@
 [iframe_sandbox_popups_escaping-3.html]
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index d5fd800f09d..ff6467094b8 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,4 +1,3 @@
 [iframe_sandbox_popups_nonescaping-3.html]
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-quirks-mode.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-quirks-mode.html.ini
deleted file mode 100644
index 79c296a8aef..00000000000
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-quirks-mode.html.ini
+++ /dev/null
@@ -1,24 +0,0 @@
-[parse-a-sizes-attribute-quirks-mode.html]
-  [<img srcset="/images/green-1x1.png?e38 50w, /images/green-16x16.png?e38 51w" sizes="(min-width:calc(0)) 1px"> ref sizes="1px" (quirks mode)]
-    expected: FAIL
-
-  [<img srcset="/images/green-1x1.png?e58 50w, /images/green-16x16.png?e58 51w" sizes="(min-width:0) or (unknown-mf-name) 1px"> ref sizes="1px" (quirks mode)]
-    expected: FAIL
-
-  [<img srcset="/images/green-1x1.png?e59 50w, /images/green-16x16.png?e59 51w" sizes="(min-width:0) or (min-width:unknown-mf-value) 1px"> ref sizes="1px" (quirks mode)]
-    expected: FAIL
-
-  [<img srcset="/images/green-1x1.png?e60 50w, /images/green-16x16.png?e60 51w" sizes="(min-width:0) or (min-width:-1px) 1px"> ref sizes="1px" (quirks mode)]
-    expected: FAIL
-
-  [<img srcset="/images/green-1x1.png?e61 50w, /images/green-16x16.png?e61 51w" sizes="(min-width:0) or (unknown &quot;general-enclosed&quot;) 1px"> ref sizes="1px" (quirks mode)]
-    expected: FAIL
-
-  [<img srcset="/images/green-1x1.png?e62 50w, /images/green-16x16.png?e62 51w" sizes="(min-width:0) or unknown-general-enclosed(foo) 1px"> ref sizes="1px" (quirks mode)]
-    expected: FAIL
-
-  [<img srcset="/images/green-1x1.png?e106 50w, /images/green-16x16.png?e106 51w" sizes="(min-width:0) or (unknown-general-enclosed !) 1px"> ref sizes="1px" (quirks mode)]
-    expected: FAIL
-
-  [<img srcset="/images/green-1x1.png?e45 50w, /images/green-16x16.png?e45 51w" sizes="(min-width:-1px) 1px, 100vw"> ref sizes="1px" (quirks mode)]
-    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/reparent-form-during-planned-navigation-task.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/reparent-form-during-planned-navigation-task.html.ini
index b4b7cecba9e..7682a4830bf 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/reparent-form-during-planned-navigation-task.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/reparent-form-during-planned-navigation-task.html.ini
@@ -1,4 +1,4 @@
 [reparent-form-during-planned-navigation-task.html]
+  expected: TIMEOUT
   [reparent-form-during-planned-navigation-task]
-    expected: FAIL
-
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
deleted file mode 100644
index 2212b9d731f..00000000000
--- a/tests/wpt/metadata-layout-2020/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[async-script.html?reload]
-  expected: ERROR
-
-[async-script.html]
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-all-global-events.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-all-global-events.html.ini
index 3a164593266..bcba06a84cf 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-all-global-events.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-all-global-events.html.ini
@@ -484,3 +484,12 @@
 
   [onpaste: the default value must be null]
     expected: FAIL
+
+  [onbeforetoggle: must be on the appropriate locations for GlobalEventHandlers]
+    expected: FAIL
+
+  [onbeforetoggle: the default value must be null]
+    expected: FAIL
+
+  [onbeforetoggle: the content attribute must be compiled into a function as the corresponding property]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini
index 7092165e1a6..e1909af3d2f 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini
@@ -124,3 +124,12 @@
 
   [not shadowed scrollend (window)]
     expected: FAIL
+
+  [not shadowed beforetoggle (document.body)]
+    expected: FAIL
+
+  [not shadowed beforetoggle (document.createElement("body"))]
+    expected: FAIL
+
+  [not shadowed beforetoggle (window)]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini
index e25a998db27..4bb3869ad9d 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini
@@ -124,3 +124,12 @@
 
   [not shadowed scrollend (window)]
     expected: FAIL
+
+  [not shadowed beforetoggle (document.body)]
+    expected: FAIL
+
+  [not shadowed beforetoggle (document.createElement("frameset"))]
+    expected: FAIL
+
+  [not shadowed beforetoggle (window)]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini
index 3fa6f190d8f..04f99b6b367 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini
@@ -70,3 +70,9 @@
 
   [scrollend is unaffected on a windowless frameset]
     expected: FAIL
+
+  [beforetoggle is unaffected on a windowless body]
+    expected: FAIL
+
+  [beforetoggle is unaffected on a windowless frameset]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/resource-timing/idlharness.any.js.ini b/tests/wpt/metadata-layout-2020/resource-timing/idlharness.any.js.ini
index 410876e8c47..080c16f6755 100644
--- a/tests/wpt/metadata-layout-2020/resource-timing/idlharness.any.js.ini
+++ b/tests/wpt/metadata-layout-2020/resource-timing/idlharness.any.js.ini
@@ -20,6 +20,12 @@
   [PerformanceResourceTiming interface: default toJSON operation on resource]
     expected: FAIL
 
+  [PerformanceResourceTiming interface: attribute deliveryType]
+    expected: FAIL
+
+  [PerformanceResourceTiming interface: resource must inherit property "deliveryType" with the proper type]
+    expected: FAIL
+
 
 [idlharness.any.worker.html]
   [PerformanceResourceTiming interface: attribute workerStart]
@@ -42,3 +48,9 @@
 
   [PerformanceResourceTiming interface: default toJSON operation on resource]
     expected: FAIL
+
+  [PerformanceResourceTiming interface: attribute deliveryType]
+    expected: FAIL
+
+  [PerformanceResourceTiming interface: resource must inherit property "deliveryType" with the proper type]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/selection/idlharness.window.js.ini b/tests/wpt/metadata-layout-2020/selection/idlharness.window.js.ini
index 7890db33546..adc033c4f6d 100644
--- a/tests/wpt/metadata-layout-2020/selection/idlharness.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/selection/idlharness.window.js.ini
@@ -16,3 +16,18 @@
 
   [Selection interface: calling getComposedRange(ShadowRoot...) on getSelection() with too few arguments must throw TypeError]
     expected: FAIL
+
+  [Selection interface: attribute direction]
+    expected: FAIL
+
+  [Selection interface: operation getComposedRanges(ShadowRoot...)]
+    expected: FAIL
+
+  [Selection interface: getSelection() must inherit property "direction" with the proper type]
+    expected: FAIL
+
+  [Selection interface: getSelection() must inherit property "getComposedRanges(ShadowRoot...)" with the proper type]
+    expected: FAIL
+
+  [Selection interface: calling getComposedRanges(ShadowRoot...) on getSelection() with too few arguments must throw TypeError]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/webxr/anchors/idlharness.https.window.js.ini b/tests/wpt/metadata-layout-2020/webxr/anchors/idlharness.https.window.js.ini
index 4bec6189b7a..b79ea99423a 100644
--- a/tests/wpt/metadata-layout-2020/webxr/anchors/idlharness.https.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/webxr/anchors/idlharness.https.window.js.ini
@@ -61,3 +61,6 @@
 
   [XRSession interface: operation deletePersistentAnchor(DOMString)]
     expected: FAIL
+
+  [XRSession interface: attribute persistentAnchors]
+    expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/webxr/idlharness.https.window.js.ini b/tests/wpt/metadata-layout-2020/webxr/idlharness.https.window.js.ini
index bf65c4fbaee..042608beeba 100644
--- a/tests/wpt/metadata-layout-2020/webxr/idlharness.https.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/webxr/idlharness.https.window.js.ini
@@ -328,3 +328,9 @@
 
   [XRSession interface: xrSession must inherit property "enabledFeatures" with the proper type]
     expected: FAIL
+
+  [XRSession interface: attribute isSystemKeyboardSupported]
+    expected: FAIL
+
+  [XRSession interface: xrSession must inherit property "isSystemKeyboardSupported" with the proper type]
+    expected: FAIL
diff --git a/tests/wpt/metadata/FileAPI/url/url-charset.window.js.ini b/tests/wpt/metadata/FileAPI/url/url-charset.window.js.ini
new file mode 100644
index 00000000000..08ab7bd35cd
--- /dev/null
+++ b/tests/wpt/metadata/FileAPI/url/url-charset.window.js.ini
@@ -0,0 +1,4 @@
+[url-charset.window.html]
+  expected: TIMEOUT
+  [Blob charset should override any auto-detected charset.]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
index 282ab0b2525..cdeaf7f7080 100644
--- a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
@@ -7,7 +7,7 @@
     expected: FAIL
 
   [Opening a blob URL in a new window immediately before revoking it works.]
-    expected: FAIL
+    expected: TIMEOUT
 
   [Opening a blob URL in a noopener about:blank window immediately before revoking it works.]
     expected: TIMEOUT
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 5ccc20c18d0..267e26130f0 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -3891,6 +3891,13 @@
        {}
       ]
      ],
+     "root-element-cv-hidden-crash.html": [
+      "890194b7c171ea7a42fd083567637aacee4fd877",
+      [
+       null,
+       {}
+      ]
+     ],
      "root-element-display-none-crash.html": [
       "fc55719c7e87bccb9d2862464b19e19112e02711",
       [
@@ -30168,7 +30175,7 @@
        ]
       ],
       "scroll-timeline-specified-scroller-print.html": [
-       "7e5b6607b6e9e99705022e10310816f2862732d8",
+       "05fab3e46ad22d01d26d5fe5ba90edb4dab798f3",
        [
         null,
         [
@@ -128120,6 +128127,19 @@
        {}
       ]
      ],
+     "anchor-scroll-composited-scrolling-006.html": [
+      "6b5f268f5548b3e6db472d4939f7076bed09a64d",
+      [
+       null,
+       [
+        [
+         "/css/css-anchor-position/reference/anchor-scroll-composited-scrolling-006-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "anchor-scroll-fixedpos.tentative.html": [
       "ee7d22608b65570fe075e02542dbd877cd38cd82",
       [
@@ -129031,6 +129051,19 @@
        {}
       ]
      ],
+     "background-attachment-fixed-inline-scrolled.html": [
+      "746997d6057ba1d2c109dafdfe7730ef149cd21e",
+      [
+       null,
+       [
+        [
+         "/css/css-backgrounds/background-attachment-fixed-inline-scrolled-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "background-attachment-fixed-inside-transform-1.html": [
       "9dae31aaccd1d281d05e43c3160000a53914d279",
       [
@@ -145645,6 +145678,58 @@
        {}
       ]
      ],
+     "overflow-clip-014.html": [
+      "4edf112e43265cd13465b6e86e9e1c2f288cf78c",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "overflow-clip-015.html": [
+      "1eb114458c1bf5a1a69620a6ea3a1f746248d610",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "overflow-clip-016.html": [
+      "4314c0135e26e6afe8659ce74fe24c14cf46281a",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "overflow-clip-017.html": [
+      "1ab3cdd194f21f90699fe7f27c34a5614228ebb7",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "overflowed-block-with-no-room-after-000.html": [
       "084e16fb38de072fb83f92ba01302a2e404cdd97",
       [
@@ -148122,7 +148207,7 @@
       ]
      ],
      "import-conditional-001.html": [
-      "9bdbbcb5a32b638d2275cd86f0b9f2bbd026ebdc",
+      "a841f265457a3f7bba741143d586e98f8e0354ef",
       [
        null,
        [
@@ -165458,6 +165543,19 @@
         {}
        ]
       ],
+      "dynamic-align-self-001.html": [
+       "208c006d2d056888dba662ea593410970e848ca9",
+       [
+        null,
+        [
+         [
+          "/css/reference/ref-filled-green-100px-square.xht",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
       "flex-abspos-staticpos-align-self-safe-001.html": [
        "b7302cb962dbff9bfc99592ac7a2d2f2aae52b21",
        [
@@ -167592,6 +167690,19 @@
        {}
       ]
      ],
+     "flex-aspect-ratio-img-row-017.html": [
+      "b2408159b5af0c445333b4a3e6ab0d9d4353d78f",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "flex-basis-001.html": [
       "85e3bc69c435da542f520bc0e5b9b0afe911f0ad",
       [
@@ -175026,6 +175137,19 @@
        {}
       ]
      ],
+     "grandchild-span-height.html": [
+      "c087edb68d48036f5b3a45114a62d9db03a5a86e",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "grid-flex-item-001.html": [
       "67ee0fb001d7b136f026190bfee0940aeb4ff849",
       [
@@ -175104,6 +175228,19 @@
        {}
       ]
      ],
+     "grid-flex-item-007.html": [
+      "bdea17d0692981c4742448f1c429e90236418858",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "image-items-flake-001.html": [
       "90319f1ad83d26d414d8ddcd4a9ab59042a4bd62",
       [
@@ -176410,6 +176547,19 @@
        {}
       ]
      ],
+     "table-as-flex-item-max-content.html": [
+      "c7316aab950ddb1ceb6f05933ae9f1cec481f191",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "table-as-item-auto-min-width.html": [
       "66a77327f0f25e07db87e342ebb590358d045f7a",
       [
@@ -188918,7 +189068,7 @@
        ]
       ],
       "auto-track-sizing-001.html": [
-       "0fdb9b0b7e2ed8855b02dcfb9baceeb61b7d05d3",
+       "4a946e6feb4dbf4c9c348896ad69a2c81232c17c",
        [
         null,
         [
@@ -189152,7 +189302,7 @@
        ]
       ],
       "independent-formatting-context.html": [
-       "888b23c2f621e1abfa027a4f42cbebb00db89656",
+       "5a76ac2d6dea91a0d13de29d9192aaf8df3ae350",
        [
         null,
         [
@@ -191552,7 +191702,7 @@
        ]
       ],
       "image-orientation-none-cross-origin.html": [
-       "e36c1295d31d43e48a6745021be3346838431158",
+       "ec139d4e229224de8c9953ecf748af2cf28cb197",
        [
         null,
         [
@@ -300261,6 +300411,32 @@
        {}
       ]
      ],
+     "scripting-print-noscript.html": [
+      "1d1af708fd7e746ef991d2067a5a32b150672893",
+      [
+       null,
+       [
+        [
+         "/css/mediaqueries/scripting-print-noscript-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
+     "scripting-print-script.html": [
+      "e80dba4d83f586df8ba48fde04356a0361861b69",
+      [
+       null,
+       [
+        [
+         "/css/mediaqueries/scripting-print-script-ref.html",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "viewport-script-dynamic.html": [
       "7433877972b09b3a03cd9f8a11dcd3efd1aa01d6",
       [
@@ -304188,6 +304364,216 @@
        {}
       ]
      ],
+     "selectors-4": {
+      "lang-000.html": [
+       "1d66bebbc6b53706ae782eec7b6a70cbaba3ec7f",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-001.html": [
+       "908643fca81d533e76869c6af874fb3797991bfc",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-002.html": [
+       "0be426c66e7d4e1e12de1778db3256752a7a560a",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-003.html": [
+       "a3e5340b6e915d32963261669991d4040df7f096",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-004.html": [
+       "d592997270746bb0cbfa286dad65d3539e519ecb",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-005.html": [
+       "816dfc9b5034e8d9787be254660012e70b60c55d",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-006.html": [
+       "d249a4c8c06a5e9a10b40df6a9bab68f367a69d2",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-007.html": [
+       "a21506d94c1125da970792b3e2da5a542f96e332",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-008.html": [
+       "77f77a884ac5088c360c34971eec637e48c42cff",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
+      ],
+      "lang-009.html": [
+       "bf2e9883916ea0e219a968b7dd6b0457e312d794",
+       [
+        null,
+        [
+         [
+          "/css/selectors/selectors-4/lang-000-ref.html",
+          "=="
+         ]
+        ],
+        {}
+       ]
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@@ -430863,7 +431296,7 @@
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@@ -442476,7 +442917,7 @@
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@@ -443434,6 +443875,10 @@
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@@ -451539,7 +451984,7 @@
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@@ -452289,7 +452734,7 @@
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@@ -452310,12 +452755,12 @@
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@@ -452509,7 +452954,7 @@
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@@ -452574,7 +453019,7 @@
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@@ -456190,6 +456635,28 @@
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@@ -456220,7 +456687,7 @@
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@@ -456655,7 +457122,7 @@
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@@ -456709,7 +457176,7 @@
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@@ -456718,11 +457185,7 @@
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@@ -456773,7 +457236,7 @@
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@@ -456781,7 +457244,7 @@
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@@ -457203,7 +457666,7 @@
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@@ -457250,6 +457713,10 @@
        "52ea57c7632d0d27b1745ddd4e983c37becf9832",
        []
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+      "softsign.json": [
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@@ -457276,7 +457743,7 @@
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@@ -457842,26 +458309,6 @@
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@@ -457898,18 +458345,10 @@
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@@ -485757,17 +486196,10 @@
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@@ -485945,25 +486845,15 @@
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@@ -742735,7 +744040,7 @@
        },
        "disown": {
         "handles.py": [
-         "d4a514576624cd9fce98cf244b00ca39008ba0ee",
+         "e1226463a5cb82b1cd4a3facda15f4af93040557",
          [
           null,
           {}
@@ -742756,7 +744061,7 @@
          ]
         ],
         "target.py": [
-         "d8439c2be3d5345a9fecb4d3205642baeba752b9",
+         "67d857a04141ea441085f92ab5bc39f57088ff5c",
          [
           null,
           {}
@@ -744073,7 +745378,7 @@
        ]
       ],
       "key_events.py": [
-       "8dbe024d18396f010b2dcac7281b8436b5b69c65",
+       "9f912684c76f4e6b7347c8a08a8b9e9559d6d6bd",
        [
         null,
         {
@@ -744281,7 +745586,7 @@
        ]
       ],
       "sequence.py": [
-       "75143d85ca600b3e3a2d7d5ac3679a26b7d7bf5a",
+       "24ca16c86043ac091b5173fcc3e8571a50107eca",
        [
         null,
         {
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-001.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-001.html.ini
new file mode 100644
index 00000000000..0842d0b5727
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-001.html.ini
@@ -0,0 +1,3 @@
+[hit-test-floats-001.html]
+  [hit-test-floats-001]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini
deleted file mode 100644
index 968f62a2553..00000000000
--- a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-002.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[hit-test-floats-002.html]
-  [Hit test float]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-003.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-003.html.ini
new file mode 100644
index 00000000000..665ec4646cb
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-003.html.ini
@@ -0,0 +1,3 @@
+[hit-test-floats-003.html]
+  [Miss float below something else]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini
new file mode 100644
index 00000000000..147f062e548
--- /dev/null
+++ b/tests/wpt/metadata/css/CSS2/floats/hit-test-floats-005.html.ini
@@ -0,0 +1,3 @@
+[hit-test-floats-005.html]
+  [Miss clipped float]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
index ee34bc91078..51432362d66 100644
--- a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
+++ b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-002.html.ini
@@ -1,6 +1,3 @@
 [block-in-inline-hittest-002.html]
   [elementsFromPoint]
     expected: FAIL
-
-  [elementFromPoint]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
index f9e216a8cfc..cdd8b55f192 100644
--- a/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
+++ b/tests/wpt/metadata/css/CSS2/normal-flow/block-in-inline-hittest-relpos-zindex.html.ini
@@ -1,6 +1,3 @@
 [block-in-inline-hittest-relpos-zindex.html]
   [position: relative; z-index: -1;]
     expected: FAIL
-
-  [block-in-inline-hittest-relpos-zindex]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/CSS2/normal-flow/hit-test-anonymous-block.html.ini b/tests/wpt/metadata/css/CSS2/normal-flow/hit-test-anonymous-block.html.ini
deleted file mode 100644
index 7c07b71d77c..00000000000
--- a/tests/wpt/metadata/css/CSS2/normal-flow/hit-test-anonymous-block.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[hit-test-anonymous-block.html]
-  [Hit test beside line of text inside anonymous block]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-animations/display-none-dont-cancel.tentative.html.ini b/tests/wpt/metadata/css/css-animations/display-none-dont-cancel.tentative.html.ini
new file mode 100644
index 00000000000..0ac75b5ef27
--- /dev/null
+++ b/tests/wpt/metadata/css/css-animations/display-none-dont-cancel.tentative.html.ini
@@ -0,0 +1,15 @@
+[display-none-dont-cancel.tentative.html]
+  [display:none animating to display:inline should be inline for the whole animation.]
+    expected: FAIL
+
+  [A CSS variable of display:none animating to display:inline should be inline for the whole animation.]
+    expected: FAIL
+
+  [Animating from display:none to display:none should not cancel the animation.]
+    expected: FAIL
+
+  [Animating from display:none to display:none with an intermediate variable should not cancel the animation.]
+    expected: FAIL
+
+  [Animating a variable of "none" which gets set to display elsewhere should not cancel the animation.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html.ini b/tests/wpt/metadata/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html.ini
new file mode 100644
index 00000000000..2789084260c
--- /dev/null
+++ b/tests/wpt/metadata/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html.ini
@@ -0,0 +1,2 @@
+[background-attachment-fixed-inline-scrolled.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-flexbox/hittest-anonymous-box.html.ini b/tests/wpt/metadata/css/css-flexbox/hittest-anonymous-box.html.ini
deleted file mode 100644
index b8f8d45a31f..00000000000
--- a/tests/wpt/metadata/css/css-flexbox/hittest-anonymous-box.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[hittest-anonymous-box.html]
-  [Hit-testing within an anonymous flex-item should return the flexbox as the hittest result.]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini b/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini
deleted file mode 100644
index 5b685485f3c..00000000000
--- a/tests/wpt/metadata/css/css-flexbox/hittest-before-pseudo.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[hittest-before-pseudo.html]
-  [Hit-testing text within a pseudo-element flex-item should return the flexbox as the hittest result.]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-flexbox/justify-content-007.html.ini b/tests/wpt/metadata/css/css-flexbox/justify-content-007.html.ini
new file mode 100644
index 00000000000..ea29b95ecec
--- /dev/null
+++ b/tests/wpt/metadata/css/css-flexbox/justify-content-007.html.ini
@@ -0,0 +1,3 @@
+[justify-content-007.html]
+  [.flexitem + .flexitem 1]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-flexbox/table-as-flex-item-max-content.html.ini b/tests/wpt/metadata/css/css-flexbox/table-as-flex-item-max-content.html.ini
new file mode 100644
index 00000000000..0757e0f9b55
--- /dev/null
+++ b/tests/wpt/metadata/css/css-flexbox/table-as-flex-item-max-content.html.ini
@@ -0,0 +1,2 @@
+[table-as-flex-item-max-content.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-fonts/variations/font-weight-matching.html.ini b/tests/wpt/metadata/css/css-fonts/variations/font-weight-matching.html.ini
index 1781ee56d0b..c8501a56905 100644
--- a/tests/wpt/metadata/css/css-fonts/variations/font-weight-matching.html.ini
+++ b/tests/wpt/metadata/css/css-fonts/variations/font-weight-matching.html.ini
@@ -34,3 +34,9 @@
 
   [Test @font-face matching for weight 250]
     expected: FAIL
+
+  [Test @font-face matching for weight 400]
+    expected: FAIL
+
+  [Test @font-face matching for weight 420]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-position/overlay/overlay-computed.html.ini b/tests/wpt/metadata/css/css-position/overlay/overlay-computed.html.ini
new file mode 100644
index 00000000000..cc0692d0132
--- /dev/null
+++ b/tests/wpt/metadata/css/css-position/overlay/overlay-computed.html.ini
@@ -0,0 +1,18 @@
+[overlay-computed.html]
+  [Property overlay value 'none']
+    expected: FAIL
+
+  [Property overlay value 'auto']
+    expected: FAIL
+
+  [Property overlay value 'inherit']
+    expected: FAIL
+
+  [Property overlay value 'initial']
+    expected: FAIL
+
+  [Property overlay value 'revert']
+    expected: FAIL
+
+  [Property overlay value 'unset']
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-position/overlay/overlay-transition-property.html.ini b/tests/wpt/metadata/css/css-position/overlay/overlay-transition-property.html.ini
new file mode 100644
index 00000000000..aacfbd3b035
--- /dev/null
+++ b/tests/wpt/metadata/css/css-position/overlay/overlay-transition-property.html.ini
@@ -0,0 +1,3 @@
+[overlay-transition-property.html]
+  [Property transition value 'overlay 1s']
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-position/overlay/overlay-valid.html.ini b/tests/wpt/metadata/css/css-position/overlay/overlay-valid.html.ini
new file mode 100644
index 00000000000..5c27614af3c
--- /dev/null
+++ b/tests/wpt/metadata/css/css-position/overlay/overlay-valid.html.ini
@@ -0,0 +1,18 @@
+[overlay-valid.html]
+  [e.style['overlay'\] = "none" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "auto" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "inherit" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "initial" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "revert" should set the property value]
+    expected: FAIL
+
+  [e.style['overlay'\] = "unset" should set the property value]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/css-transforms/inline-with-filter-and-hidden-backface.html.ini b/tests/wpt/metadata/css/css-transforms/inline-with-filter-and-hidden-backface.html.ini
deleted file mode 100644
index ae4a71ae9b3..00000000000
--- a/tests/wpt/metadata/css/css-transforms/inline-with-filter-and-hidden-backface.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[inline-with-filter-and-hidden-backface.html]
-  [Hit test]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
new file mode 100644
index 00000000000..72b09371038
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-001.html.ini
@@ -0,0 +1,3 @@
+[elementFromPoint-001.html]
+  [CSSOM View - 5 - extensions to the Document interface]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-table.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-table.html.ini
deleted file mode 100644
index db065588308..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-float-in-table.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementFromPoint-float-in-table.html]
-  [float-in-div]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
index 390e170437a..8ae9bae3500 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
@@ -13,15 +13,3 @@
 
   [<li>Outside 3</li>]
     expected: FAIL
-
-  [<li>Inside 2</li>]
-    expected: FAIL
-
-  [<li>Inside 3</li>]
-    expected: FAIL
-
-  [<li>Image Inside 1</li>]
-    expected: FAIL
-
-  [<li>Image Inside 2</li>]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-subpixel.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-subpixel.html.ini
new file mode 100644
index 00000000000..8f6f663ba61
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-subpixel.html.ini
@@ -0,0 +1,3 @@
+[elementFromPoint-subpixel.html]
+  [Hit test top left corner of box]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
deleted file mode 100644
index a6bca7ac372..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-visibility-hidden-resizer.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementFromPoint-visibility-hidden-resizer.html]
-  [elementFromPoint on resizer area of an element with visibility:hidden]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
index ceb43099040..3615da5f3a2 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPosition.html.ini
@@ -17,3 +17,9 @@
 
   [test some point of the element: bottom right corner]
     expected: FAIL
+
+  [test some point of the element: top left corner]
+    expected: FAIL
+
+  [test the top of layer]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
deleted file mode 100644
index a3496a40d07..00000000000
--- a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-invalid-cases.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[elementsFromPoint-invalid-cases.html]
-  [The root element is the last element returned for otherwise empty queries within the viewport]
-    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-simple.html.ini b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-simple.html.ini
index 8ee043a8df4..60cfceba6fa 100644
--- a/tests/wpt/metadata/css/cssom-view/elementsFromPoint-simple.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementsFromPoint-simple.html.ini
@@ -1,3 +1,6 @@
 [elementsFromPoint-simple.html]
   [elementsFromPoint for each corner of a div that has a pseudo-element]
     expected: FAIL
+
+  [elementsFromPoint for each corner of a simple div]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/cssom-view/scroll-behavior-smooth-navigation.html.ini b/tests/wpt/metadata/css/cssom-view/scroll-behavior-smooth-navigation.html.ini
new file mode 100644
index 00000000000..a3e30250229
--- /dev/null
+++ b/tests/wpt/metadata/css/cssom-view/scroll-behavior-smooth-navigation.html.ini
@@ -0,0 +1,6 @@
+[scroll-behavior-smooth-navigation.html]
+  [Instant scrolling while doing history navigation.]
+    expected: FAIL
+
+  [Smooth scrolling while doing history navigation.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/mediaqueries/scripting-print-noscript.html.ini b/tests/wpt/metadata/css/mediaqueries/scripting-print-noscript.html.ini
new file mode 100644
index 00000000000..f8256a35717
--- /dev/null
+++ b/tests/wpt/metadata/css/mediaqueries/scripting-print-noscript.html.ini
@@ -0,0 +1,2 @@
+[scripting-print-noscript.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/mediaqueries/scripting-print-script.html.ini b/tests/wpt/metadata/css/mediaqueries/scripting-print-script.html.ini
new file mode 100644
index 00000000000..2143b97f4b4
--- /dev/null
+++ b/tests/wpt/metadata/css/mediaqueries/scripting-print-script.html.ini
@@ -0,0 +1,2 @@
+[scripting-print-script.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/mediaqueries/scripting.html.ini b/tests/wpt/metadata/css/mediaqueries/scripting.html.ini
new file mode 100644
index 00000000000..afffc87ac19
--- /dev/null
+++ b/tests/wpt/metadata/css/mediaqueries/scripting.html.ini
@@ -0,0 +1,27 @@
+[scripting.html]
+  [Should be known: '(scripting)']
+    expected: FAIL
+
+  [Should be known: '(scripting: enabled)']
+    expected: FAIL
+
+  [Should be known: '(scripting: initial-only)']
+    expected: FAIL
+
+  [Should be known: '(scripting: none)']
+    expected: FAIL
+
+  [Should be parseable: '(scripting: 0)']
+    expected: FAIL
+
+  [Should be parseable: '(scripting: 10px)']
+    expected: FAIL
+
+  [Should be parseable: '(scripting: invalid)']
+    expected: FAIL
+
+  [Check that scripting currently matches 'enabled']
+    expected: FAIL
+
+  [Check that scripting currently evaluates to true in the boolean context]
+    expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/selectors-4/lang-011.html.ini b/tests/wpt/metadata/css/selectors/selectors-4/lang-011.html.ini
new file mode 100644
index 00000000000..b168bf5cd3a
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/selectors-4/lang-011.html.ini
@@ -0,0 +1,2 @@
+[lang-011.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/css/selectors/selectors-4/lang-012.html.ini b/tests/wpt/metadata/css/selectors/selectors-4/lang-012.html.ini
new file mode 100644
index 00000000000..cdc6bafba43
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/selectors-4/lang-012.html.ini
@@ -0,0 +1,2 @@
+[lang-012.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini b/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
index e9ab91fc80e..4c1c78640bb 100644
--- a/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
+++ b/tests/wpt/metadata/fetch/api/basic/keepalive.any.js.ini
@@ -1,3 +1,4 @@
 [keepalive.any.html]
+  expected: TIMEOUT
   [keepalive in onunload in nested frame in another window]
     expected: FAIL
diff --git a/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini b/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini
deleted file mode 100644
index c57e48f2078..00000000000
--- a/tests/wpt/metadata/fetch/api/redirect/redirect-keepalive.any.js.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[redirect-keepalive.any.html]
-  expected: TIMEOUT
diff --git a/tests/wpt/metadata/fetch/content-type/response.window.js.ini b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
index f5ba8274138..4807d68ba4d 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -174,9 +174,6 @@
   [fetch(): separate response Content-Type: text/plain;charset=gbk text/plain]
     expected: NOTRUN
 
-  [Request: combined response Content-Type:  text/plain]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/plain ]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini b/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
index f9de5391ad6..36a410bfecb 100644
--- a/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
+++ b/tests/wpt/metadata/fetch/metadata/generated/css-images.sub.tentative.html.ini
@@ -146,3 +146,6 @@
 
   [list-style-image sec-fetch-site - HTTPS downgrade-upgrade]
     expected: FAIL
+
+  [border-image sec-fetch-site - HTTPS downgrade (header not sent)]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/empty-iframe-load-event.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/empty-iframe-load-event.html.ini
deleted file mode 100644
index 3e07e6b7d1f..00000000000
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/empty-iframe-load-event.html.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[empty-iframe-load-event.html]
-  [Check execution order from nested timeout]
-    expected: FAIL
-
-  [Check execution order on load handler]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html.ini
index ab9ac6e835e..1d68034a37d 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/failure-check-sequence.https.html.ini
@@ -1,13 +1,12 @@
 [failure-check-sequence.https.html]
-  expected: TIMEOUT
   [CSP check precedes COEP check - CSP header first]
-    expected: NOTRUN
+    expected: FAIL
 
   [COEP check precedes X-Frame-Options check]
-    expected: NOTRUN
+    expected: FAIL
 
   [CSP check precedes COEP check - COEP header first]
-    expected: NOTRUN
+    expected: FAIL
 
   [CSP check precedes X-Frame-Options check]
-    expected: TIMEOUT
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
index 78240a2f463..8ae58f9f1e2 100644
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/javascript-url-return-value-handling-dynamic.html.ini
@@ -16,3 +16,6 @@
 
   [D83D DE0D set in href="" targeting a frame and clicked]
     expected: FAIL
+
+  [DE0D 0041 set in href="" targeting a frame and clicked]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
new file mode 100644
index 00000000000..4ecd6d9f753
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-cross-origin.sub.window.js.ini
@@ -0,0 +1,3 @@
+[navigation-unload-cross-origin.sub.window.html]
+  [Cross-origin navigation started from unload handler must be ignored]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
new file mode 100644
index 00000000000..7dc346632a4
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/navigation-unload-same-origin.window.js.ini
@@ -0,0 +1,3 @@
+[navigation-unload-same-origin.window.html]
+  [Same-origin navigation started from unload handler must be ignored]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
new file mode 100644
index 00000000000..60a4fa51f8a
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/a-click.html.ini
@@ -0,0 +1,3 @@
+[a-click.html]
+  [aElement.click() before the load event must NOT replace]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini b/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini
deleted file mode 100644
index d993e8dcc42..00000000000
--- a/tests/wpt/metadata/html/browsers/browsing-the-web/read-media/pageload-image-in-popup.html.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[pageload-image-in-popup.html]
-  [The document for a standalone media file should have one child in the body.]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
new file mode 100644
index 00000000000..7a5fcb79165
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
@@ -0,0 +1,3 @@
+[traverse_the_history_5.html]
+  [Multiple history traversals, last would be aborted]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/element/manual/drawing-text-to-the-canvas/canvas.2d.disconnected.html.ini b/tests/wpt/metadata/html/canvas/element/manual/drawing-text-to-the-canvas/canvas.2d.disconnected.html.ini
index 2a54f2f8814..5cdcce07c65 100644
--- a/tests/wpt/metadata/html/canvas/element/manual/drawing-text-to-the-canvas/canvas.2d.disconnected.html.ini
+++ b/tests/wpt/metadata/html/canvas/element/manual/drawing-text-to-the-canvas/canvas.2d.disconnected.html.ini
@@ -1,2 +1,2 @@
 [canvas.2d.disconnected.html]
-  expected: TIMEOUT
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html.ini b/tests/wpt/metadata/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html.ini
deleted file mode 100644
index 5ff0d0fdbbc..00000000000
--- a/tests/wpt/metadata/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[2d.filter.canvasFilterObject.dropShadow.tentative.html]
-  expected: FAIL
diff --git a/tests/wpt/metadata/html/dom/idlharness.https.html.ini b/tests/wpt/metadata/html/dom/idlharness.https.html.ini
index 396feea2e32..50e9a6ac04a 100644
--- a/tests/wpt/metadata/html/dom/idlharness.https.html.ini
+++ b/tests/wpt/metadata/html/dom/idlharness.https.html.ini
@@ -1601,6 +1601,45 @@
   [SVGElement interface: attribute onscrollend]
     expected: FAIL
 
+  [ToggleEvent interface: existence and properties of interface object]
+    expected: FAIL
+
+  [ToggleEvent interface object length]
+    expected: FAIL
+
+  [ToggleEvent interface object name]
+    expected: FAIL
+
+  [ToggleEvent interface: existence and properties of interface prototype object]
+    expected: FAIL
+
+  [ToggleEvent interface: existence and properties of interface prototype object's "constructor" property]
+    expected: FAIL
+
+  [ToggleEvent interface: existence and properties of interface prototype object's @@unscopables property]
+    expected: FAIL
+
+  [ToggleEvent interface: attribute oldState]
+    expected: FAIL
+
+  [ToggleEvent interface: attribute newState]
+    expected: FAIL
+
+  [ToggleEvent must be primary interface of new ToggleEvent("beforetoggle")]
+    expected: FAIL
+
+  [Stringification of new ToggleEvent("beforetoggle")]
+    expected: FAIL
+
+  [ToggleEvent interface: new ToggleEvent("beforetoggle") must inherit property "oldState" with the proper type]
+    expected: FAIL
+
+  [ToggleEvent interface: new ToggleEvent("beforetoggle") must inherit property "newState" with the proper type]
+    expected: FAIL
+
+  [SVGElement interface: attribute onbeforetoggle]
+    expected: FAIL
+
 
 [idlharness.https.html?include=(Document|Window)]
   [Document interface: documentWithHandlers must inherit property "queryCommandEnabled(DOMString)" with the proper type]
@@ -2221,6 +2260,24 @@
   [Window interface: window must inherit property "onpaste" with the proper type]
     expected: FAIL
 
+  [Window interface: attribute onbeforetoggle]
+    expected: FAIL
+
+  [Window interface: window must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
+  [Document interface: attribute onbeforetoggle]
+    expected: FAIL
+
+  [Document interface: iframe.contentDocument must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
+  [Document interface: new Document() must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
+  [Document interface: documentWithHandlers must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
 
 [idlharness.https.html?include=HTML.*]
   [HTMLTableSectionElement interface: document.createElement("tfoot") must inherit property "align" with the proper type]
@@ -4334,3 +4391,213 @@
 
   [HTMLScriptElement interface: document.createElement("script") must inherit property "blocking" with the proper type]
     expected: FAIL
+
+  [HTMLElement interface: operation showPopover()]
+    expected: FAIL
+
+  [HTMLElement interface: operation hidePopover()]
+    expected: FAIL
+
+  [HTMLElement interface: operation togglePopover(optional boolean)]
+    expected: FAIL
+
+  [HTMLElement interface: attribute popover]
+    expected: FAIL
+
+  [HTMLElement interface: attribute onbeforetoggle]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "showPopover()" with the proper type]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "hidePopover()" with the proper type]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "togglePopover(optional boolean)" with the proper type]
+    expected: FAIL
+
+  [HTMLElement interface: calling togglePopover(optional boolean) on document.createElement("noscript") with too few arguments must throw TypeError]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "popover" with the proper type]
+    expected: FAIL
+
+  [HTMLElement interface: document.createElement("noscript") must inherit property "onbeforetoggle" with the proper type]
+    expected: FAIL
+
+  [HTMLLinkElement interface: attribute fetchPriority]
+    expected: FAIL
+
+  [HTMLLinkElement interface: document.createElement("link") must inherit property "fetchPriority" with the proper type]
+    expected: FAIL
+
+  [HTMLImageElement interface: attribute fetchPriority]
+    expected: FAIL
+
+  [HTMLImageElement interface: document.createElement("img") must inherit property "fetchPriority" with the proper type]
+    expected: FAIL
+
+  [HTMLImageElement interface: new Image() must inherit property "fetchPriority" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: attribute popoverTargetElement]
+    expected: FAIL
+
+  [HTMLInputElement interface: attribute popoverTargetAction]
+    expected: FAIL
+
+  [HTMLInputElement interface: document.createElement("input") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: document.createElement("input") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("text") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("text") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("hidden") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("hidden") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("search") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("search") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("tel") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("tel") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("url") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("url") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("email") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("email") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("password") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("password") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("date") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("date") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("month") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("month") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("week") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("week") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("time") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("time") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("datetime-local") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("datetime-local") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("number") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("number") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("range") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("range") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("color") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("color") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("checkbox") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("checkbox") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("radio") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("radio") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("file") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("file") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("submit") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("submit") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("image") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("image") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("reset") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("reset") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("button") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLInputElement interface: createInput("button") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLButtonElement interface: attribute popoverTargetElement]
+    expected: FAIL
+
+  [HTMLButtonElement interface: attribute popoverTargetAction]
+    expected: FAIL
+
+  [HTMLButtonElement interface: document.createElement("button") must inherit property "popoverTargetElement" with the proper type]
+    expected: FAIL
+
+  [HTMLButtonElement interface: document.createElement("button") must inherit property "popoverTargetAction" with the proper type]
+    expected: FAIL
+
+  [HTMLScriptElement interface: attribute fetchPriority]
+    expected: FAIL
+
+  [HTMLScriptElement interface: document.createElement("script") must inherit property "fetchPriority" with the proper type]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html.ini b/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html.ini
new file mode 100644
index 00000000000..27c12573f11
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html.ini
@@ -0,0 +1,3 @@
+[http-equiv-and-name-1.html]
+  [<meta> set the color-scheme to dark]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html.ini b/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html.ini
new file mode 100644
index 00000000000..def16bc1f29
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html.ini
@@ -0,0 +1,3 @@
+[http-equiv-and-name-2.html]
+  [<meta> set the content-language to de-DE]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name.html.ini b/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name.html.ini
deleted file mode 100644
index 99f2e083da9..00000000000
--- a/tests/wpt/metadata/html/semantics/document-metadata/the-meta-element/http-equiv-and-name.html.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[http-equiv-and-name.html]
-  [<meta> set the color-scheme to dark]
-    expected: FAIL
-
-  [<meta> set the content-language to dark]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
index 7df8f9458e9..841bafc6eca 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-2.html.ini
@@ -1,4 +1,3 @@
 [iframe_sandbox_popups_escaping-2.html]
-  expected: CRASH
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
     expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index f9138fb999a..6f7461b9472 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,5 +1,4 @@
 [iframe_sandbox_popups_nonescaping-1.html]
   type: testharness
-  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: NOTRUN
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
index 3cdeb8ebcbc..47b45e65a1c 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
@@ -1,3 +1,9 @@
 [non-active-document.html]
   [DOMParser]
     expected: FAIL
+
+  [createHTMLDocument]
+    expected: FAIL
+
+  [<template>]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-submit-iframe-then-location-navigate.html.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-submit-iframe-then-location-navigate.html.ini
new file mode 100644
index 00000000000..d44f3ccff52
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-submit-iframe-then-location-navigate.html.ini
@@ -0,0 +1,3 @@
+[form-submit-iframe-then-location-navigate.html]
+  [Verifies that location navigations take precedence when following form submissions.]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini b/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
index cc18f512574..071b4378add 100644
--- a/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
+++ b/tests/wpt/metadata/html/semantics/links/links-created-by-a-and-area-elements/htmlanchorelement_noopener.html.ini
@@ -11,6 +11,3 @@
 
   [Check that rel=noopener with target=_parent does a normal load]
     expected: FAIL
-
-  [Check that rel=noopener with target=_self does a normal load]
-    expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
deleted file mode 100644
index 2212b9d731f..00000000000
--- a/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/defer-script/async-script.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[async-script.html?reload]
-  expected: ERROR
-
-[async-script.html]
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
index 8845054116d..e55f8f2ce3c 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/compile-event-handler-settings-objects.html.ini
@@ -3,3 +3,6 @@
   expected: TIMEOUT
   [The incumbent settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
     expected: TIMEOUT
+
+  [The entry settings object while executing the compiled callback via Web IDL's invoke must be that of the node document]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-all-global-events.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-all-global-events.html.ini
index 5ff7875ce72..7649a7eff8c 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-all-global-events.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-all-global-events.html.ini
@@ -503,3 +503,12 @@
 
   [onpaste: the default value must be null]
     expected: FAIL
+
+  [onbeforetoggle: must be on the appropriate locations for GlobalEventHandlers]
+    expected: FAIL
+
+  [onbeforetoggle: the default value must be null]
+    expected: FAIL
+
+  [onbeforetoggle: the content attribute must be compiled into a function as the corresponding property]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini
index ca681bfa984..8652a34d6c2 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-body-window.html.ini
@@ -137,3 +137,12 @@
 
   [not shadowed scrollend (window)]
     expected: FAIL
+
+  [not shadowed beforetoggle (document.body)]
+    expected: FAIL
+
+  [not shadowed beforetoggle (document.createElement("body"))]
+    expected: FAIL
+
+  [not shadowed beforetoggle (window)]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini
index 7ff89c04b44..c00f9f0a377 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-frameset-window.html.ini
@@ -133,3 +133,12 @@
 
   [not shadowed scrollend (window)]
     expected: FAIL
+
+  [not shadowed beforetoggle (document.body)]
+    expected: FAIL
+
+  [not shadowed beforetoggle (document.createElement("frameset"))]
+    expected: FAIL
+
+  [not shadowed beforetoggle (window)]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini
index e1638db8b78..fe670236729 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/events/event-handler-attributes-windowless-body.html.ini
@@ -79,3 +79,9 @@
 
   [scrollend is unaffected on a windowless frameset]
     expected: FAIL
+
+  [beforetoggle is unaffected on a windowless body]
+    expected: FAIL
+
+  [beforetoggle is unaffected on a windowless frameset]
+    expected: FAIL
diff --git a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
index dbe1def99e3..7237f5792de 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry-different-function-realm.html.ini
@@ -1,9 +1,10 @@
 [promise-job-entry-different-function-realm.html]
+  expected: TIMEOUT
   [Fulfillment handler on fulfilled promise]
     expected: FAIL
 
   [Rejection handler on pending-then-rejected promise]
-    expected: FAIL
+    expected: TIMEOUT
 
   [Thenable resolution]
     expected: FAIL
@@ -12,4 +13,4 @@
     expected: FAIL
 
   [Fulfillment handler on pending-then-fulfilled promise]
-    expected: FAIL
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/resource-timing/content-type-parsing.html.ini b/tests/wpt/metadata/resource-timing/content-type-parsing.html.ini
index 71ca4ed5411..49b17a921b5 100644
--- a/tests/wpt/metadata/resource-timing/content-type-parsing.html.ini
+++ b/tests/wpt/metadata/resource-timing/content-type-parsing.html.ini
@@ -94,10 +94,10 @@
     expected: FAIL
 
   [mime-type 16 : text/html;charset=\x0bgbk]
-    expected: FAIL
+    expected: TIMEOUT
 
   [mime-type 17 : text/html;charset=\x0cgbk]
-    expected: TIMEOUT
+    expected: NOTRUN
 
   [mime-type 18 : text/html;\x0bcharset=gbk]
     expected: NOTRUN
diff --git a/tests/wpt/metadata/resource-timing/idlharness.any.js.ini b/tests/wpt/metadata/resource-timing/idlharness.any.js.ini
index a763160c0e0..a96df921c04 100644
--- a/tests/wpt/metadata/resource-timing/idlharness.any.js.ini
+++ b/tests/wpt/metadata/resource-timing/idlharness.any.js.ini
@@ -20,6 +20,12 @@
   [PerformanceResourceTiming interface: resource must inherit property "renderBlockingStatus" with the proper type]
     expected: FAIL
 
+  [PerformanceResourceTiming interface: attribute deliveryType]
+    expected: FAIL
+
+  [PerformanceResourceTiming interface: resource must inherit property "deliveryType" with the proper type]
+    expected: FAIL
+
 
 [idlharness.any.worker.html]
   [PerformanceResourceTiming interface: resource must inherit property "workerStart" with the proper type]
@@ -42,3 +48,9 @@
 
   [PerformanceResourceTiming interface: resource must inherit property "renderBlockingStatus" with the proper type]
     expected: FAIL
+
+  [PerformanceResourceTiming interface: attribute deliveryType]
+    expected: FAIL
+
+  [PerformanceResourceTiming interface: resource must inherit property "deliveryType" with the proper type]
+    expected: FAIL
diff --git a/tests/wpt/metadata/selection/idlharness.window.js.ini b/tests/wpt/metadata/selection/idlharness.window.js.ini
index 7890db33546..adc033c4f6d 100644
--- a/tests/wpt/metadata/selection/idlharness.window.js.ini
+++ b/tests/wpt/metadata/selection/idlharness.window.js.ini
@@ -16,3 +16,18 @@
 
   [Selection interface: calling getComposedRange(ShadowRoot...) on getSelection() with too few arguments must throw TypeError]
     expected: FAIL
+
+  [Selection interface: attribute direction]
+    expected: FAIL
+
+  [Selection interface: operation getComposedRanges(ShadowRoot...)]
+    expected: FAIL
+
+  [Selection interface: getSelection() must inherit property "direction" with the proper type]
+    expected: FAIL
+
+  [Selection interface: getSelection() must inherit property "getComposedRanges(ShadowRoot...)" with the proper type]
+    expected: FAIL
+
+  [Selection interface: calling getComposedRanges(ShadowRoot...) on getSelection() with too few arguments must throw TypeError]
+    expected: FAIL
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
index 20a8f9a4320..1f70062991c 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-analysernode-interface/realtimeanalyser-fft-scaling.html.ini
@@ -1,5 +1,4 @@
 [realtimeanalyser-fft-scaling.html]
-  expected: TIMEOUT
   [X 2048-point FFT peak position is not equal to 64. Got 0.]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/webaudio/the-audio-api/the-audiocontext-interface/audiocontext-not-fully-active.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-audiocontext-interface/audiocontext-not-fully-active.html.ini
index b7537329068..eed03df37f3 100644
--- a/tests/wpt/metadata/webaudio/the-audio-api/the-audiocontext-interface/audiocontext-not-fully-active.html.ini
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-audiocontext-interface/audiocontext-not-fully-active.html.ini
@@ -1,5 +1,4 @@
 [audiocontext-not-fully-active.html]
-  expected: TIMEOUT
   [frame in navigated remote-site frame]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/webmessaging/with-ports/017.html.ini b/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
deleted file mode 100644
index c7946fc91b4..00000000000
--- a/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
diff --git a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini b/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
deleted file mode 100644
index b7b36c1d3a4..00000000000
--- a/tests/wpt/metadata/webmessaging/without-ports/018.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[018.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, javascript:]
-    expected: TIMEOUT
diff --git a/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini b/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
new file mode 100644
index 00000000000..aa6c9e5b826
--- /dev/null
+++ b/tests/wpt/metadata/webstorage/localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html.ini
@@ -0,0 +1,4 @@
+[localstorage-about-blank-3P-iframe-opens-3P-window.partitioned.tentative.html]
+  expected: TIMEOUT
+  [StorageKey: test 3P about:blank window opened from a 3P iframe]
+    expected: TIMEOUT
diff --git a/tests/wpt/metadata/webxr/anchors/idlharness.https.window.js.ini b/tests/wpt/metadata/webxr/anchors/idlharness.https.window.js.ini
index 4bec6189b7a..b79ea99423a 100644
--- a/tests/wpt/metadata/webxr/anchors/idlharness.https.window.js.ini
+++ b/tests/wpt/metadata/webxr/anchors/idlharness.https.window.js.ini
@@ -61,3 +61,6 @@
 
   [XRSession interface: operation deletePersistentAnchor(DOMString)]
     expected: FAIL
+
+  [XRSession interface: attribute persistentAnchors]
+    expected: FAIL
diff --git a/tests/wpt/metadata/webxr/idlharness.https.window.js.ini b/tests/wpt/metadata/webxr/idlharness.https.window.js.ini
index c904025859f..f24aec48da2 100644
--- a/tests/wpt/metadata/webxr/idlharness.https.window.js.ini
+++ b/tests/wpt/metadata/webxr/idlharness.https.window.js.ini
@@ -385,3 +385,9 @@
 
   [XRSession interface: xrSession must inherit property "enabledFeatures" with the proper type]
     expected: FAIL
+
+  [XRSession interface: attribute isSystemKeyboardSupported]
+    expected: FAIL
+
+  [XRSession interface: xrSession must inherit property "isSystemKeyboardSupported" with the proper type]
+    expected: FAIL
diff --git a/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
new file mode 100644
index 00000000000..80f9a4f15b8
--- /dev/null
+++ b/tests/wpt/metadata/workers/constructors/Worker/Worker-constructor.html.ini
@@ -0,0 +1,2 @@
+[Worker-constructor.html]
+  expected: ERROR
diff --git a/tests/wpt/mozilla/meta/mozilla/scrollBy.html.ini b/tests/wpt/mozilla/meta/mozilla/scrollBy.html.ini
new file mode 100644
index 00000000000..f78f699f620
--- /dev/null
+++ b/tests/wpt/mozilla/meta/mozilla/scrollBy.html.ini
@@ -0,0 +1,3 @@
+[scrollBy.html]
+  [Ensure that the window.scrollBy function affects scroll position as expected]
+    expected: FAIL
diff --git a/tests/wpt/web-platform-tests/.github/workflows/interfaces.yml b/tests/wpt/web-platform-tests/.github/workflows/interfaces.yml
index 91aecaa12f1..2e55ab28e18 100644
--- a/tests/wpt/web-platform-tests/.github/workflows/interfaces.yml
+++ b/tests/wpt/web-platform-tests/.github/workflows/interfaces.yml
@@ -15,7 +15,7 @@ jobs:
     - name: Create pull request
       # Use a conditional step instead of a conditional job to work around #20700.
       if: github.repository == 'web-platform-tests/wpt'
-      uses: peter-evans/create-pull-request@v4
+      uses: peter-evans/create-pull-request@v5
       with:
         token: ${{ secrets.GITHUB_TOKEN }}
         author: wpt-pr-bot <wpt-pr-bot@users.noreply.github.com>
diff --git a/tests/wpt/web-platform-tests/.github/workflows/regen_certs.yml b/tests/wpt/web-platform-tests/.github/workflows/regen_certs.yml
index 4e29171ff27..e1691b779ff 100644
--- a/tests/wpt/web-platform-tests/.github/workflows/regen_certs.yml
+++ b/tests/wpt/web-platform-tests/.github/workflows/regen_certs.yml
@@ -24,7 +24,7 @@ jobs:
     - name: Commit and create pull request
       # Use a conditional step instead of a conditional job to work around #20700.
       if: github.repository == 'web-platform-tests/wpt'
-      uses: peter-evans/create-pull-request@v4
+      uses: peter-evans/create-pull-request@v5
       with:
         token: ${{ secrets.GITHUB_TOKEN }}
         author: wpt-pr-bot <wpt-pr-bot@users.noreply.github.com>
diff --git a/tests/wpt/web-platform-tests/attribution-reporting/resources/reports.py b/tests/wpt/web-platform-tests/attribution-reporting/resources/reports.py
index 432f5c61d5e..4d4c3fd5ec7 100644
--- a/tests/wpt/web-platform-tests/attribution-reporting/resources/reports.py
+++ b/tests/wpt/web-platform-tests/attribution-reporting/resources/reports.py
@@ -13,8 +13,6 @@ Header = Tuple[str, str]
 Status = Tuple[int, str]
 Response = Tuple[Status, List[Header], str]
 
-CLEAR_STASH = isomorphic_encode("clear_stash")
-
 
 def decode_headers(headers: dict) -> dict:
   """Decodes the headers from wptserve.
@@ -40,14 +38,8 @@ def handle_post_report(request: Request, headers: List[Header]) -> Response:
   """Handles POST request for reports.
 
   Retrieves the report from the request body and stores the report in the
-  stash. If clear_stash is specified in the query params, clears the stash.
+  stash.
   """
-  if request.GET.get(CLEAR_STASH):
-    clear_stash(request.server.stash)
-    return (200, "OK"), headers, json.dumps({
-        "code": 200,
-        "message": "Stash successfully cleared.",
-    })
   store_report(
       request.server.stash, get_request_origin(request), {
           "body": request.body.decode("utf-8"),
@@ -97,12 +89,6 @@ def take_reports(stash: Stash, origin: str) -> List[str]:
   return reports
 
 
-def clear_stash(stash: Stash) -> None:
-  "Clears the stash."
-  stash.take(REPORTS)
-  return None
-
-
 def handle_reports(request: Request) -> Response:
   """Handles request to get or store reports."""
   headers = [("Content-Type", "application/json")]
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic_async.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic.tentative.https.any.js
similarity index 77%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic_async.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic.tentative.https.any.js
index 3a9a32dedc0..18b8985cf51 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic_async.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic.tentative.https.any.js
@@ -1,6 +1,7 @@
 // META: timeout=long
 // META: script=/resources/test-only-api.js
 // META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
 
 'use strict';
 
@@ -17,9 +18,10 @@ pressure_test((t, mockPressureService) => {
 pressure_test(async (t, mockPressureService) => {
   const changes = await new Promise(resolve => {
     const observer = new PressureObserver(resolve);
+    t.add_cleanup(() => observer.disconnect());
     observer.observe('cpu');
-    mockPressureService.setPressureUpdate('critical');
-    mockPressureService.startPlatformCollector(/*sampleRate=*/ 1.0);
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
   assert_true(changes.length === 1);
   assert_equals(changes[0].state, 'critical');
@@ -34,8 +36,8 @@ pressure_test((t, mockPressureService) => {
 
   const promise = observer.observe('cpu');
   observer.unobserve('cpu');
-  mockPressureService.setPressureUpdate('critical');
-  mockPressureService.startPlatformCollector(/*sampleRate=*/ 1.0);
+  mockPressureService.setPressureUpdate('cpu', 'critical');
+  mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
 
   return promise_rejects_dom(t, 'NotSupportedError', promise);
 }, 'Removing observer before observe() resolves works');
@@ -47,14 +49,15 @@ pressure_test(async (t, mockPressureService) => {
   for (let i = 0; i < 2; i++) {
     callbackPromises.push(new Promise(resolve => {
       const observer = new PressureObserver(resolve);
+      t.add_cleanup(() => observer.disconnect());
       observePromises.push(observer.observe('cpu'));
     }));
   }
 
   await Promise.all(observePromises);
 
-  mockPressureService.setPressureUpdate('critical');
-  mockPressureService.startPlatformCollector(/*sampleRate=*/ 1.0);
+  mockPressureService.setPressureUpdate('cpu', 'critical');
+  mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
 
   return Promise.all(callbackPromises);
 }, 'Calling observe() multiple times works');
@@ -68,10 +71,11 @@ pressure_test(async (t, mockPressureService) => {
     });
     t.add_cleanup(() => observer1.disconnect());
     observer1.observe('cpu');
-    mockPressureService.setPressureUpdate('critical');
-    mockPressureService.startPlatformCollector(/*sampleRate=*/ 1.0);
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
   assert_true(observer1_changes.length === 1);
+  assert_equals(observer1_changes[0][0].source, 'cpu');
   assert_equals(observer1_changes[0][0].state, 'critical');
 
   const observer2_changes = [];
@@ -84,5 +88,6 @@ pressure_test(async (t, mockPressureService) => {
     observer2.observe('cpu');
   });
   assert_true(observer2_changes.length === 1);
+  assert_equals(observer2_changes[0][0].source, 'cpu');
   assert_equals(observer2_changes[0][0].state, 'critical');
 }, 'Starting a new observer after an observer has started works');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic.tentative.https.window.js
deleted file mode 100644
index e2d9a0f05bc..00000000000
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_basic.tentative.https.window.js
+++ /dev/null
@@ -1,35 +0,0 @@
-'use strict';
-
-promise_test(async t => {
-  await new Promise((resolve, reject) => {
-    const observer = new PressureObserver(resolve, {sampleRate: 1.0});
-    t.add_cleanup(() => observer.disconnect());
-    observer.observe('cpu').catch(reject);
-  });
-}, 'An active PressureObserver calls its callback at least once');
-
-promise_test(async t => {
-  await new Promise(resolve => {
-    const myDedicatedWorker = new Worker(
-        '/compute-pressure/resources/observer-in-dedicated-worker.js');
-    myDedicatedWorker.onmessage = event => {
-      assert_equals(typeof event.data.time, 'number');
-      assert_equals('cpu', event.data.source);
-      resolve();
-    };
-  });
-}, 'Test receives updates from dedicated worker');
-
-promise_test(async t => {
-  await new Promise(resolve => {
-    const mySharedWorker = new SharedWorker(
-        '/compute-pressure/resources/observer-in-shared-worker.js');
-    mySharedWorker.port.start();
-    mySharedWorker.port.postMessage('observe');
-    mySharedWorker.port.onmessage = event => {
-      assert_equals(typeof event.data.time, 'number');
-      assert_equals('cpu', event.data.source);
-      resolve();
-    };
-  });
-}, 'Test receives updates from shared worker');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_cross_origin_focus_control.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_cross_origin_focus_control.tentative.https.window.js
index f88c9fdf64e..950334d6fc5 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_cross_origin_focus_control.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_cross_origin_focus_control.tentative.https.window.js
@@ -1,9 +1,11 @@
 // META: timeout=long
 // META: script=/common/get-host-info.sub.js
+// META: script=/resources/test-only-api.js
+// META: script=resources/pressure-helpers.js
 
 'use strict';
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const iframe = document.createElement('iframe');
   iframe.src = get_host_info().HTTPS_REMOTE_ORIGIN +
       '/compute-pressure/resources/support-iframe.html';
@@ -20,11 +22,13 @@ promise_test(async t => {
     iframe.remove();
   });
   await observer.observe('cpu');
+  mockPressureService.setPressureUpdate('cpu', 'critical');
+  mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
 
-  return new Promise(resolve => t.step_timeout(resolve, 2000));
+  return new Promise(resolve => t.step_timeout(resolve, 1000));
 }, 'Observer in main frame should not receive PressureRecord when focused on cross-origin iframe');
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const iframe = document.createElement('iframe');
   iframe.src = get_host_info().HTTPS_REMOTE_ORIGIN +
       '/compute-pressure/resources/support-iframe.html';
@@ -49,5 +53,7 @@ promise_test(async t => {
       }
     }, {once: true});
     iframe.contentWindow.postMessage({command: 'start'}, '*');
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 }, 'Observer in iframe should not receive PressureRecord when focused on cross-origin main frame');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_detached_iframe.tentative.https.html b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_detached_iframe.tentative.https.html
index 3b0a5504e53..5511a147048 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_detached_iframe.tentative.https.html
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_detached_iframe.tentative.https.html
@@ -3,6 +3,8 @@
 <title>PressureObserver on DOMWindow of detached iframe</title>
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
+<script src="/resources/test-only-api.js"></script>
+<script src="resources/pressure-helpers.js"></script>
 <body>
 <script>
 'use strict';
@@ -21,9 +23,7 @@ promise_test(async t => {
   document.body.appendChild(iframe);
   const frame_window = iframe.contentWindow;
 
-  const observer = new frame_window.PressureObserver(
-      () => {},
-      {sampleRate: 1});
+  const observer = new frame_window.PressureObserver(() => {});
   const iframe_DOMException = frame_window.DOMException;
 
   iframe.remove();
@@ -38,9 +38,7 @@ promise_test(async t => {
   document.body.appendChild(iframe);
   const frame_window = iframe.contentWindow;
 
-  const observer = new frame_window.PressureObserver(
-      () => {},
-      {sampleRate: 1});
+  const observer = new frame_window.PressureObserver(() => {});
 
   await observer.observe('cpu');
 
@@ -50,43 +48,43 @@ promise_test(async t => {
   observer.disconnect();
 }, 'PressureObserver.disconnect() on detached frame returns');
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const iframe = document.createElement('iframe');
   document.body.appendChild(iframe);
   const frame_window = iframe.contentWindow;
 
-  const observer = new frame_window.PressureObserver(
-      () => {},
-      {sampleRate: 1});
+  const observer = new frame_window.PressureObserver(() => {});
   const iframe_DOMException = frame_window.DOMException;
 
   // await is intentionally not used here. We want to remove the iframe while
   // the returned Promise settles.
-  const observe_promise = observer.observe('cpu');
+  observer.observe('cpu');
   iframe.remove();
 
   // Establish an observer and wait for changes in the main frame. This should
   // keep the test running long enough to catch any crash from the observe()
   // call in the removed iframe's PressureObserver.
   const changes = await new Promise((resolve, reject) => {
-    const observer = new PressureObserver(
-        resolve, {sampleRate: 1});
+    const observer = new PressureObserver(resolve);
     t.add_cleanup(() => observer.disconnect());
     observer.observe('cpu').catch(reject);
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
-  assert_in_array(changes[0].state, ['nominal', 'fair', 'serious', 'critical'],
-                  'cpu pressure state');
+  assert_equals(changes[0].state, 'critical');
 }, 'Detaching frame while PressureObserver.observe() settles');
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const iframe = document.createElement('iframe');
   document.body.appendChild(iframe);
   const frame_window = iframe.contentWindow;
   const observer = new frame_window.PressureObserver(() => {
     assert_unreached('The observer callback should not be called');
-  }, {sampleRate: 1});
+  });
 
   await observer.observe('cpu');
+  mockPressureService.setPressureUpdate('cpu', 'critical');
+  mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
 
   iframe.remove();
 
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect.tentative.https.any.js
similarity index 73%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect.tentative.https.any.js
index c9950f2dc84..1d188fad8b8 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect.tentative.https.any.js
@@ -1,3 +1,7 @@
+// META: script=/resources/test-only-api.js
+// META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
+
 'use strict';
 
 test(t => {
@@ -8,11 +12,11 @@ test(t => {
   observer.disconnect();
 }, 'Call disconnect() directly should not crash');
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const observer1_changes = [];
   const observer1 = new PressureObserver(change => {
     observer1_changes.push(change);
-  }, {sampleRate: 1.0});
+  });
   t.add_cleanup(() => observer1.disconnect());
   // Ensure that observer1's schema gets registered before observer2 starts.
   await observer1.observe('cpu');
@@ -23,9 +27,11 @@ promise_test(async t => {
     const observer2 = new PressureObserver(change => {
       observer2_changes.push(change);
       resolve();
-    }, {sampleRate: 1.0});
+    });
     t.add_cleanup(() => observer2.disconnect());
     observer2.observe('cpu').catch(reject);
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 
   assert_equals(
@@ -34,7 +40,5 @@ promise_test(async t => {
 
   assert_equals(observer2_changes.length, 1);
   assert_equals(observer2_changes[0].length, 1);
-  assert_in_array(
-      observer2_changes[0][0].state, ['nominal', 'fair', 'serious', 'critical'],
-      'cpu pressure state');
+  assert_equals(observer2_changes[0][0].state, 'critical');
 }, 'Stopped PressureObserver do not receive changes');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_idempotent.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_idempotent.tentative.https.any.js
similarity index 69%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_idempotent.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_idempotent.tentative.https.any.js
index 72021fd2708..2f6421ee117 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_idempotent.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_idempotent.tentative.https.any.js
@@ -1,10 +1,14 @@
+// META: script=/resources/test-only-api.js
+// META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
+
 'use strict';
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const observer1_changes = [];
   const observer1 = new PressureObserver(changes => {
     observer1_changes.push(changes);
-  }, {sampleRate: 1});
+  });
   t.add_cleanup(() => observer1.disconnect());
   // Ensure that observer1's schema gets registered before observer2 starts.
   const promise = observer1.observe('cpu');
@@ -17,9 +21,11 @@ promise_test(async t => {
     const observer2 = new PressureObserver(changes => {
       observer2_changes.push(changes);
       resolve();
-    }, {sampleRate: 1});
+    });
     t.add_cleanup(() => observer2.disconnect());
     observer2.observe('cpu').catch(reject);
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 
   assert_equals(
@@ -27,7 +33,5 @@ promise_test(async t => {
       'stopped observers should not receive callbacks');
 
   assert_equals(observer2_changes.length, 1);
-  assert_in_array(
-      observer2_changes[0][0].state, ['nominal', 'fair', 'serious', 'critical'],
-      'cpu pressure state');
+  assert_equals(observer2_changes[0][0].state, 'critical');
 }, 'Stopped PressureObserver do not receive changes');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_immediately.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_immediately.tentative.https.any.js
similarity index 72%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_immediately.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_immediately.tentative.https.any.js
index 1abe84d5720..b96ebd802e6 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_immediately.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_disconnect_immediately.tentative.https.any.js
@@ -1,10 +1,14 @@
+// META: script=/resources/test-only-api.js
+// META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
+
 'use strict';
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const observer1_changes = [];
   const observer1 = new PressureObserver(changes => {
     observer1_changes.push(changes);
-  }, {sampleRate: 1.0});
+  });
   t.add_cleanup(() => observer1.disconnect());
   // Ensure that observer1's schema gets registered before observer2 starts.
   const promise = observer1.observe('cpu');
@@ -16,9 +20,11 @@ promise_test(async t => {
     const observer2 = new PressureObserver(changes => {
       observer2_changes.push(changes);
       resolve();
-    }, {sampleRate: 1.0});
+    });
     t.add_cleanup(() => observer2.disconnect());
     observer2.observe('cpu').catch(reject);
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 
   assert_equals(
@@ -27,16 +33,14 @@ promise_test(async t => {
 
   assert_equals(observer2_changes.length, 1);
   assert_equals(observer2_changes[0].length, 1);
-  assert_in_array(
-      observer2_changes[0][0].state, ['nominal', 'fair', 'serious', 'critical'],
-      'cpu pressure state');
+  assert_equals(observer2_changes[0][0].state, 'critical');
 }, 'Stopped PressureObserver do not receive changes');
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const observer1_changes = [];
   const observer1 = new PressureObserver(changes => {
     observer1_changes.push(changes);
-  }, {sampleRate: 1});
+  });
   t.add_cleanup(() => observer1.disconnect());
 
   const observer2_changes = [];
@@ -44,12 +48,14 @@ promise_test(async t => {
     const observer2 = new PressureObserver(changes => {
       observer2_changes.push(changes);
       resolve();
-    }, {sampleRate: 1});
+    });
     t.add_cleanup(() => observer2.disconnect());
     const promise = observer1.observe('cpu');
     observer2.observe('cpu');
     observer1.disconnect();
     await promise_rejects_dom(t, 'NotSupportedError', promise);
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 
   assert_equals(
@@ -57,7 +63,5 @@ promise_test(async t => {
       'stopped observers should not receive callbacks');
 
   assert_equals(observer2_changes.length, 1);
-  assert_in_array(
-      observer2_changes[0][0].state, ['nominal', 'fair', 'serious', 'critical'],
-      'cpu pressure state');
+  assert_equals(observer2_changes[0][0].state, 'critical');
 }, 'Removing observer before observe() resolves does not affect other observers');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_duplicate_updates.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_duplicate_updates.tentative.https.any.js
similarity index 88%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_duplicate_updates.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_duplicate_updates.tentative.https.any.js
index 3c312ca5b1f..b5d7690d182 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_duplicate_updates.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_duplicate_updates.tentative.https.any.js
@@ -1,5 +1,6 @@
 // META: script=/resources/test-only-api.js
 // META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
 
 'use strict';
 
@@ -14,13 +15,13 @@ pressure_test(async (t, mockPressureService) => {
     }, {sampleRate: 5.0});
     observer.observe('cpu');
     const updatesDelivered = mockPressureService.updatesDelivered();
-    mockPressureService.setPressureUpdate('critical');
+    mockPressureService.setPressureUpdate('cpu', 'critical');
     mockPressureService.startPlatformCollector(/*sampleRate*/ 5.0);
     // Deliver 2 updates.
     await t.step_wait(
         () => mockPressureService.updatesDelivered() >= (updatesDelivered + 2),
         'Wait for more than one update to be delivered to the observer');
-    mockPressureService.setPressureUpdate('nominal');
+    mockPressureService.setPressureUpdate('cpu', 'nominal');
     // Deliver more updates, |resolve()| will be called when the new pressure
     // state reaches PressureObserver and its callback is invoked
     // for the second time.
@@ -41,14 +42,14 @@ pressure_test(async (t, mockPressureService) => {
     }, {sampleRate: 5.0});
     observer.observe('cpu');
     const updatesDelivered = mockPressureService.updatesDelivered();
-    mockPressureService.setPressureUpdate('critical', ['thermal']);
+    mockPressureService.setPressureUpdate('cpu', 'critical', ['thermal']);
     mockPressureService.startPlatformCollector(/*sampleRate*/ 5.0);
 
     // Deliver 2 updates.
     await t.step_wait(
         () => mockPressureService.updatesDelivered() >= (updatesDelivered + 2),
         'Wait for more than one update to be delivered to the observer');
-    mockPressureService.setPressureUpdate('critical', ['power-supply']);
+    mockPressureService.setPressureUpdate('cpu', 'critical', ['power-supply']);
     // Deliver more updates, |resolve()| will be called when the new pressure
     // state reaches PressureObserver and its callback is invoked
     // for the second time.
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_factors.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_factors.tentative.https.any.js
similarity index 63%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_factors.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_factors.tentative.https.any.js
index 6d8d2208887..7486a70f911 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_factors.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_factors.tentative.https.any.js
@@ -1,14 +1,16 @@
 // META: script=/resources/test-only-api.js
 // META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
 
 'use strict';
 
 pressure_test(async (t, mockPressureService) => {
   const changes = await new Promise(resolve => {
-    const observer = new PressureObserver(resolve, {sampleRate: 1.0});
+    const observer = new PressureObserver(resolve);
+    t.add_cleanup(() => observer.disconnect());
     observer.observe('cpu');
-    mockPressureService.setPressureUpdate('critical', ['thermal']);
-    mockPressureService.startPlatformCollector(/*sampleRate=*/ 1.0);
+    mockPressureService.setPressureUpdate('cpu', 'critical', ['thermal']);
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
   assert_true(changes.length === 1);
   assert_equals(changes[0].state, 'critical');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple.tentative.https.any.js
similarity index 58%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple.tentative.https.any.js
index 6015ae1f81b..c8cef5beca0 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple.tentative.https.any.js
@@ -1,30 +1,35 @@
+// META: script=/resources/test-only-api.js
+// META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
+
 'use strict';
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const changes1_promise = new Promise((resolve, reject) => {
-    const observer = new PressureObserver(resolve, {sampleRate: 1.0});
+    const observer = new PressureObserver(resolve);
     t.add_cleanup(() => observer.disconnect());
     observer.observe('cpu').catch(reject);
   });
 
   const changes2_promise = new Promise((resolve, reject) => {
-    const observer = new PressureObserver(resolve, {sampleRate: 1.0});
+    const observer = new PressureObserver(resolve);
     t.add_cleanup(() => observer.disconnect());
     observer.observe('cpu').catch(reject);
   });
 
   const changes3_promise = new Promise((resolve, reject) => {
-    const observer = new PressureObserver(resolve, {sampleRate: 1.0});
+    const observer = new PressureObserver(resolve);
     t.add_cleanup(() => observer.disconnect());
     observer.observe('cpu').catch(reject);
   });
 
+  mockPressureService.setPressureUpdate('cpu', 'critical');
+  mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
+
   const [changes1, changes2, changes3] =
       await Promise.all([changes1_promise, changes2_promise, changes3_promise]);
 
   for (const changes of [changes1, changes2, changes3]) {
-    assert_in_array(
-        changes[0].state, ['nominal', 'fair', 'serious', 'critical'],
-        'cpu pressure state');
+    assert_equals(changes[0].state, 'critical');
   }
 }, 'Three PressureObserver instances receive changes');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple_across_iframes.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple_across_iframes.tentative.https.window.js
deleted file mode 100644
index 838b9a17a00..00000000000
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_multiple_across_iframes.tentative.https.window.js
+++ /dev/null
@@ -1,40 +0,0 @@
-'use strict';
-
-promise_test(async t => {
-  const changes1_promise = new Promise((resolve, reject) => {
-    const observer = new PressureObserver(resolve, {sampleRate: 1.0});
-    t.add_cleanup(() => observer.disconnect());
-    observer.observe('cpu').catch(reject);
-  });
-
-  // iframe numbers are aligned with observer numbers. The first observer is
-  // in the main frame, so there is no iframe1.
-  const iframe2 = document.createElement('iframe');
-  document.body.appendChild(iframe2);
-
-  const changes2_promise = new Promise((resolve, reject) => {
-    const observer =
-        new iframe2.contentWindow.PressureObserver(resolve, {sampleRate: 1.0});
-    t.add_cleanup(() => observer.disconnect());
-    observer.observe('cpu').catch(reject);
-  });
-
-  const iframe3 = document.createElement('iframe');
-  document.body.appendChild(iframe3);
-
-  const changes3_promise = new Promise((resolve, reject) => {
-    const observer =
-        new iframe3.contentWindow.PressureObserver(resolve, {sampleRate: 1.0});
-    t.add_cleanup(() => observer.disconnect());
-    observer.observe('cpu').catch(reject);
-  });
-
-  const [changes1, changes2, changes3] =
-      await Promise.all([changes1_promise, changes2_promise, changes3_promise]);
-
-  for (const changes of [changes1, changes2, changes3]) {
-    assert_in_array(
-        changes[0].state, ['nominal', 'fair', 'serious', 'critical'],
-        'cpu pressure state');
-  }
-}, 'Three PressureObserver instances, in different iframes, receive changes');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_idempotent.tentative.https.any.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_idempotent.tentative.https.any.js
new file mode 100644
index 00000000000..5dc3804b2f7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_idempotent.tentative.https.any.js
@@ -0,0 +1,19 @@
+// META: script=/resources/test-only-api.js
+// META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
+
+'use strict';
+
+pressure_test(async (t, mockPressureService) => {
+  const update = await new Promise((resolve, reject) => {
+    const observer = new PressureObserver(resolve);
+    t.add_cleanup(() => observer.disconnect());
+    observer.observe('cpu').catch(reject);
+    observer.observe('cpu').catch(reject);
+    observer.observe('cpu').catch(reject);
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
+  });
+
+  assert_equals(update[0].state, 'critical');
+}, 'PressureObserver.observe() is idempotent');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_idempotent.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_idempotent.tentative.https.window.js
deleted file mode 100644
index e60115fee87..00000000000
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_idempotent.tentative.https.window.js
+++ /dev/null
@@ -1,16 +0,0 @@
-'use strict';
-
-promise_test(async t => {
-  const update = await new Promise((resolve, reject) => {
-    const observer = new PressureObserver(resolve, {sampleRate: 1.0});
-    t.add_cleanup(() => observer.disconnect());
-    observer.observe('cpu').catch(reject);
-    observer.observe('cpu').catch(reject);
-    observer.observe('cpu').catch(reject);
-  });
-
-  assert_equals(typeof update[0].state, 'string');
-  assert_in_array(
-      update[0].state, ['nominal', 'fair', 'serious', 'critical'],
-      'cpu pressure state');
-}, 'PressureObserver.observe() is idempotent');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_unobserve_failure.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_unobserve_failure.tentative.https.any.js
similarity index 62%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_unobserve_failure.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_unobserve_failure.tentative.https.any.js
index c32649da5c3..8eafeb356d8 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_unobserve_failure.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_observe_unobserve_failure.tentative.https.any.js
@@ -1,15 +1,17 @@
+// META: global=window,dedicatedworker,sharedworker
+
 'use strict';
 
 promise_test(async t => {
-  const observer = new PressureObserver(
-      t.unreached_func('oops should not end up here'), {sampleRate: 1.0});
+  const observer =
+      new PressureObserver(t.unreached_func('oops should not end up here'));
   t.add_cleanup(() => observer.disconnect());
   await promise_rejects_js(t, TypeError, observer.observe('random'));
 }, 'PressureObserver.observe() requires a valid source');
 
 test(t => {
-  const observer = new PressureObserver(
-      t.unreached_func('oops should not end up here'), {sampleRate: 1.0});
+  const observer =
+      new PressureObserver(t.unreached_func('oops should not end up here'));
   t.add_cleanup(() => observer.disconnect());
   assert_throws_js(TypeError, () => {
     observer.unobserve('random');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_options.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_options.tentative.https.any.js
similarity index 93%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_options.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_options.tentative.https.any.js
index d142ecc0881..69999819d96 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_options.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_options.tentative.https.any.js
@@ -1,3 +1,5 @@
+// META: global=window,dedicatedworker,sharedworker
+
 'use strict';
 
 test(t => {
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_privacy_test.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_privacy_test.tentative.https.window.js
index d33f6ef09ad..113f4bdf79b 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_privacy_test.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_privacy_test.tentative.https.window.js
@@ -5,10 +5,12 @@
 // META: script=/picture-in-picture/resources/picture-in-picture-helpers.js
 // META: script=/resources/testdriver.js
 // META: script=/resources/testdriver-vendor.js
+// META: script=/resources/test-only-api.js
+// META: script=resources/pressure-helpers.js
 
 'use strict';
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const video = await loadVideo();
   document.body.appendChild(video);
   const pipWindow = await requestPictureInPictureWithTrustedClick(video);
@@ -38,10 +40,12 @@ promise_test(async t => {
       video.remove();
     });
     observer.observe('cpu');
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 }, 'Observer should receive PressureRecord if associated document is the initiator of active Picture-in-Picture session');
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   await setMediaPermission();
   const stream =
       await navigator.mediaDevices.getUserMedia({video: true, audio: true});
@@ -67,5 +71,7 @@ promise_test(async t => {
       stream.getTracks().forEach(track => track.stop());
     });
     observer.observe('cpu');
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 }, 'Observer should receive PressureRecord if browsing context is capturing');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_same_origin_focus_control.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_same_origin_focus_control.tentative.https.window.js
index 746f119f249..7df0be5c47d 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_same_origin_focus_control.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_same_origin_focus_control.tentative.https.window.js
@@ -1,21 +1,27 @@
+// META: timeout=long
+// META: script=/resources/test-only-api.js
+// META: script=resources/pressure-helpers.js
+
 'use strict';
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const iframe = document.createElement('iframe');
   document.body.appendChild(iframe);
   iframe.contentWindow.focus();
 
   await new Promise(resolve => {
     const observer = new PressureObserver(resolve);
-    t.add_cleanup(async () => {
+    t.add_cleanup(() => {
       observer.disconnect();
       iframe.remove();
     });
     observer.observe('cpu');
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 }, 'Observer in main frame should receive PressureRecord when focused on same-origin iframe');
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   const iframe = document.createElement('iframe');
   document.body.appendChild(iframe);
   // Focus on the main frame to make the iframe lose focus, so that
@@ -31,5 +37,7 @@ promise_test(async t => {
       iframe.remove();
     });
     observer.observe('cpu');
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
 }, 'Observer in iframe should receive PressureRecord when focused on same-origin main frame');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_supported_sources.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_supported_sources.tentative.https.any.js
similarity index 92%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_supported_sources.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_supported_sources.tentative.https.any.js
index 2a69e731e7f..63f2666cca6 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_supported_sources.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_supported_sources.tentative.https.any.js
@@ -1,3 +1,5 @@
+// META: global=window,dedicatedworker,sharedworker
+
 'use strict';
 
 test(() => {
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_take_records.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_take_records.tentative.https.any.js
similarity index 67%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_take_records.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_take_records.tentative.https.any.js
index d294a7e80fd..d93c9b5c886 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_take_records.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_take_records.tentative.https.any.js
@@ -1,28 +1,28 @@
 // META: script=/resources/test-only-api.js
 // META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
 
 'use strict';
 
 test(t => {
   const observer = new PressureObserver(
-      t.unreached_func('This callback should not have been called.'),
-      {sampleRate: 1.0});
+      t.unreached_func('This callback should not have been called.'));
 
   const records = observer.takeRecords();
   assert_equals(records.length, 0, 'No record before observe');
 }, 'Calling takeRecords() before observe()');
 
-promise_test(async t => {
+pressure_test(async (t, mockPressureService) => {
   let observer;
   const changes = await new Promise(resolve => {
-    observer = new PressureObserver(resolve, {sampleRate: 1.0});
+    observer = new PressureObserver(resolve);
     t.add_cleanup(() => observer.disconnect());
 
     observer.observe('cpu');
+    mockPressureService.setPressureUpdate('cpu', 'critical');
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
-  assert_in_array(
-      changes[0].state, ['nominal', 'fair', 'serious', 'critical'],
-      'cpu presure state');
+  assert_equals(changes[0].state, 'critical');
 
   const records = observer.takeRecords();
   assert_equals(records.length, 0, 'No record available');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_timestamp.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_timestamp.tentative.https.any.js
similarity index 91%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_timestamp.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_timestamp.tentative.https.any.js
index b9b932e64fc..f283caa6bae 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_timestamp.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_timestamp.tentative.https.any.js
@@ -1,5 +1,6 @@
 // META: script=/resources/test-only-api.js
 // META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
 
 'use strict';
 
@@ -21,7 +22,8 @@ pressure_test(async (t, mockPressureService) => {
     // cause the actual timer used by mockPressureService to deliver readings
     // to be a bit slower or faster than requested.
     while (observerChanges.length < 4) {
-      mockPressureService.setPressureUpdate(readings[i++ % readings.length]);
+      mockPressureService.setPressureUpdate(
+          'cpu', readings[i++ % readings.length]);
       await t.step_wait(
           () => mockPressureService.updatesDelivered() >= i,
           `At least ${i} readings have been delivered`);
@@ -51,7 +53,7 @@ pressure_test(async (t, mockPressureService) => {
 
   await new Promise(async resolve => {
     observer.observe('cpu');
-    mockPressureService.setPressureUpdate('critical');
+    mockPressureService.setPressureUpdate('cpu', 'critical');
     mockPressureService.startPlatformCollector(sampleRate);
     await t.step_wait(() => pressureChanges.length == 1);
     observer.disconnect();
@@ -60,7 +62,7 @@ pressure_test(async (t, mockPressureService) => {
 
   await new Promise(async resolve => {
     observer.observe('cpu');
-    mockPressureService.setPressureUpdate('serious');
+    mockPressureService.setPressureUpdate('cpu', 'serious');
     mockPressureService.startPlatformCollector(sampleRate * 4);
     await t.step_wait(() => pressureChanges.length == 2);
     observer.disconnect();
diff --git a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_update_toJSON.tentative.https.window.js b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_update_toJSON.tentative.https.any.js
similarity index 74%
rename from tests/wpt/web-platform-tests/compute-pressure/compute_pressure_update_toJSON.tentative.https.window.js
rename to tests/wpt/web-platform-tests/compute-pressure/compute_pressure_update_toJSON.tentative.https.any.js
index 7f3acf3e07f..c1cd240a3bc 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_update_toJSON.tentative.https.window.js
+++ b/tests/wpt/web-platform-tests/compute-pressure/compute_pressure_update_toJSON.tentative.https.any.js
@@ -1,12 +1,13 @@
 // META: script=/resources/test-only-api.js
 // META: script=resources/pressure-helpers.js
+// META: global=window,dedicatedworker,sharedworker
 
 pressure_test(async (t, mockPressureService) => {
   const changes = await new Promise(resolve => {
     const observer = new PressureObserver(resolve);
     observer.observe('cpu');
-    mockPressureService.setPressureUpdate('critical', ['thermal']);
-    mockPressureService.startPlatformCollector(/*sampleRate=*/ 1.0);
+    mockPressureService.setPressureUpdate('cpu', 'critical', ['thermal']);
+    mockPressureService.startPlatformCollector(/*sampleRate=*/ 5.0);
   });
   assert_true(changes.length === 1);
   const json = changes[0].toJSON();
@@ -15,4 +16,3 @@ pressure_test(async (t, mockPressureService) => {
   assert_equals(json.factors[0], 'thermal');
   assert_equals(typeof json.time, 'number');
 }, 'Basic functionality test');
-
diff --git a/tests/wpt/web-platform-tests/compute-pressure/resources/observer-in-dedicated-worker.js b/tests/wpt/web-platform-tests/compute-pressure/resources/observer-in-dedicated-worker.js
deleted file mode 100644
index a30edd0a33e..00000000000
--- a/tests/wpt/web-platform-tests/compute-pressure/resources/observer-in-dedicated-worker.js
+++ /dev/null
@@ -1,10 +0,0 @@
-'use strict';
-
-function pressureCallback(update) {
-  postMessage(update[0].toJSON());
-};
-
-const observerWorker =
-    new PressureObserver(pressureCallback, {sampleRate: 0.5});
-
-observerWorker.observe('cpu');
diff --git a/tests/wpt/web-platform-tests/compute-pressure/resources/observer-in-shared-worker.js b/tests/wpt/web-platform-tests/compute-pressure/resources/observer-in-shared-worker.js
deleted file mode 100644
index f69eadaacee..00000000000
--- a/tests/wpt/web-platform-tests/compute-pressure/resources/observer-in-shared-worker.js
+++ /dev/null
@@ -1,21 +0,0 @@
-'use strict';
-
-onconnect = function(e) {
-  const port = e.ports[0];  // get the port
-  let started = false;
-
-  port.start();  // Open the port connection to enable two-way communication
-
-  let observerWorker =
-      new PressureObserver(pressureCallback, {sampleRate: 0.5});
-
-  port.onmessage = function(e) {
-    if (started === false)
-      observerWorker.observe('cpu');
-    started = true;
-  };
-
-  function pressureCallback(update) {
-    port.postMessage(update[0].toJSON());
-  };
-}
diff --git a/tests/wpt/web-platform-tests/compute-pressure/resources/support-iframe.html b/tests/wpt/web-platform-tests/compute-pressure/resources/support-iframe.html
index 57e18b77f62..6b2b3097926 100644
--- a/tests/wpt/web-platform-tests/compute-pressure/resources/support-iframe.html
+++ b/tests/wpt/web-platform-tests/compute-pressure/resources/support-iframe.html
@@ -11,7 +11,7 @@ async function messageHandler(e) {
             resolve('success');
         });
         observer.observe('cpu');
-        window.setTimeout(() => { reject('timeout'); }, 2000);
+        window.setTimeout(() => { reject('timeout'); }, 1000);
     });
   } else {
     return Promise.reject(`unknown command "${e.data.command}"`);
diff --git a/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-non-oof-inherit.html b/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-non-oof-inherit.html
new file mode 100644
index 00000000000..75f98a1ebfe
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-non-oof-inherit.html
@@ -0,0 +1,117 @@
+<!DOCTYPE html>
+<title>Tests that anchor functions can be inherited from in-flow elements</title>
+<link rel="help" href="https://drafts4.csswg.org/css-anchor-position-1/">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1382151">
+<link rel="author" href="mailto:xiaochengh@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+<script src="support/test-common.js"></script>
+
+<style>
+.cb {
+  width: 200px;
+  height: 200px;
+  transform: scale(1);
+}
+
+.anchor {
+  width: 100px;
+  height: 100px;
+  top: 50px;
+  left: 50px;
+  position: relative;
+  background: red;
+  anchor-name: --a;
+}
+
+.target {
+  position: absolute;
+  background: green;
+  top: inherit;
+  bottom: inherit;
+  left: inherit;
+  right: inherit;
+  width: inherit;
+  min-width: inherit;
+  max-width: inherit;
+  height: inherit;
+  min-height: inherit;
+  max-height: inherit;
+}
+
+.inset-parent {
+  top: anchor(--a top);
+  bottom: anchor(--a bottom);
+  left: anchor(--a left);
+  right: anchor(--a right);
+}
+
+.size-parent {
+  width: anchor-size(--a width);
+  height: anchor-size(--a height);
+  top: 50px;
+  left: 50px;
+}
+
+.min-size-parent {
+  min-width: anchor-size(--a width);
+  min-height: anchor-size(--a height);
+  top: 50px;
+  left: 50px;
+  bottom: 200px;
+  right: 200px;
+}
+
+.max-size-parent {
+  max-width: anchor-size(--a width);
+  max-height: anchor-size(--a height);
+  top: 50px;
+  left: 50px;
+  bottom: 0px;
+  right: 0px;
+}
+
+</style>
+
+<body onload="checkLayoutForAnchorPos('.target')">
+
+<p>In each test case, we should see a filled green square with no red.</p>
+
+<div class=cb>
+  <div class="anchor"></div>
+  <div class="inset-parent">
+    <div class="target"
+         data-offset-x=50 data-offset-y=50
+         data-expected-width=100 data-expected-height=100></div>
+  </div>
+</div>
+
+<div class=cb>
+  <div class="anchor"></div>
+  <div class="size-parent">
+    <div class="target"
+         data-offset-x=50 data-offset-y=50
+         data-expected-width=100 data-expected-height=100></div>
+  </div>
+</div>
+
+<div class=cb>
+  <div class="anchor"></div>
+  <div class="min-size-parent">
+    <div class="target"
+         data-offset-x=50 data-offset-y=50
+         data-expected-width=100 data-expected-height=100></div>
+  </div>
+</div>
+
+<div class=cb>
+  <div class="anchor"></div>
+  <div class="max-size-parent">
+    <div class="target"
+         data-offset-x=50 data-offset-y=50
+         data-expected-width=100 data-expected-height=100></div>
+  </div>
+</div>
+
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-scroll-composited-scrolling-006.html b/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-scroll-composited-scrolling-006.html
new file mode 100644
index 00000000000..6b5f268f554
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-anchor-position/anchor-scroll-composited-scrolling-006.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<title>Tests anchor-scroll element paint order in composited scrolling</title>
+<link rel="help" href="https://drafts4.csswg.org/css-anchor-position-1/#scroll">
+<link rel="author" href="mailto:xiaochengh@chromium.org">
+<link rel="match" href="reference/anchor-scroll-composited-scrolling-006-ref.html">
+<style>
+body {
+  margin: 0;
+}
+#scroller {
+  width: 200px;
+  height: 100px;
+  overflow: scroll;
+  will-change: scroll-position;
+}
+#spacer {
+  height: 400px;
+}
+#anchor {
+  width: 100px;
+  height: 100px;
+  anchor-name: --a;
+}
+#target {
+  position: absolute;
+  width: 100px;
+  height: 100px;
+  background: red;
+  left: 0;
+  bottom: anchor(--a top);
+  anchor-scroll: --a;
+}
+#overlap {
+  position: absolute;
+  width: 100px;
+  height: 100px;
+  top: 150px;
+  left: 0;
+  z-index: 100;
+  background: green;
+}
+</style>
+
+<div id="overlap"></div>
+<div id="scroller">
+  <div id="spacer"></div>
+  <div id="anchor"></div>
+</div>
+<div id="target"></div>
+
+<script type="module">
+function raf() { return new Promise(resolve => requestAnimationFrame(resolve)); }
+
+await raf();
+await raf();
+scroller.scrollTop = 150;
+
+document.documentElement.classList.remove('reftest-wait');
+</script>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-anchor-position/reference/anchor-scroll-composited-scrolling-006-ref.html b/tests/wpt/web-platform-tests/css/css-anchor-position/reference/anchor-scroll-composited-scrolling-006-ref.html
new file mode 100644
index 00000000000..92fe187117e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-anchor-position/reference/anchor-scroll-composited-scrolling-006-ref.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<style>
+body {
+  margin: 0;
+}
+#scroller {
+  width: 200px;
+  height: 100px;
+  overflow: scroll;
+  will-change: scroll-position;
+}
+#spacer {
+  height: 400px;
+}
+#anchor {
+  width: 100px;
+  height: 100px;
+  anchor-name: --a;
+}
+#overlap {
+  position: absolute;
+  width: 100px;
+  height: 100px;
+  top: 150px;
+  left: 0;
+  z-index: 100;
+  background: green;
+}
+</style>
+
+<div id="overlap"></div>
+<div id="scroller">
+  <div id="spacer"></div>
+  <div id="anchor"></div>
+</div>
+
+<script>
+scroller.scrollTop = 150;
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-animations/display-none-dont-cancel.tentative.html b/tests/wpt/web-platform-tests/css/css-animations/display-none-dont-cancel.tentative.html
new file mode 100644
index 00000000000..6ae115803b8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-animations/display-none-dont-cancel.tentative.html
@@ -0,0 +1,146 @@
+<!DOCTYPE html>
+<link rel=author href="mailto:jarhar@chromium.org">
+<link rel=help href="https://drafts.csswg.org/css-display-4/#display-animation">
+<link rel=help href="https://github.com/w3c/csswg-drafts/issues/6429">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/css-animations/support/testcommon.js"></script>
+
+<div id=target1>hello</div>
+<style>
+@keyframes display1 {
+  0% { display: none; }
+  100% { display: inline; }
+}
+.animate1 {
+  animation: display1 1s infinite;
+}
+</style>
+<script>
+promise_test(async () => {
+  let numAnimationstartFired = 0;
+  target1.addEventListener('animationstart', () => numAnimationstartFired++);
+
+  await waitForAnimationFrames(1);
+  target1.classList.add('animate1');
+  await waitForAnimationFrames(2);
+
+  assert_equals(getComputedStyle(target1).display, 'inline',
+    'The display should be inline during the animation.');
+  assert_equals(numAnimationstartFired, 1,
+    'Only one animation should start.');
+}, 'display:none animating to display:inline should be inline for the whole animation.');
+</script>
+
+<div id=target2>hello</div>
+<style>
+@keyframes display2 {
+  0% { display: var(--none-value); }
+  100% { display: inline; }
+}
+.animate2 {
+  animation: display2 1s infinite;
+}
+#target2 {
+  --none-value: none;
+}
+</style>
+<script>
+promise_test(async () => {
+  let numAnimationstartFired = 0;
+  target2.addEventListener('animationstart', () => numAnimationstartFired++);
+
+  await waitForAnimationFrames(1);
+  target2.classList.add('animate2');
+  await waitForAnimationFrames(2);
+
+  assert_equals(getComputedStyle(target2).display, 'inline',
+    'The display should be inline during the animation.');
+  assert_equals(numAnimationstartFired, 1,
+    'Only one animation should start.');
+}, 'A CSS variable of display:none animating to display:inline should be inline for the whole animation.');
+</script>
+
+<div id=target3>hello</div>
+<style>
+@keyframes display3 {
+  0% { display: none; }
+  100% { display: none; }
+}
+.animate3 {
+  animation: display3 1s infinite;
+}
+</style>
+<script>
+promise_test(async () => {
+  let numAnimationstartFired = 0;
+  target3.addEventListener('animationstart', () => numAnimationstartFired++);
+
+  await waitForAnimationFrames(1);
+  target3.classList.add('animate3');
+  await waitForAnimationFrames(2);
+
+  assert_equals(getComputedStyle(target3).display, 'none',
+    'The display should be none and the animation should keep running.');
+  assert_equals(numAnimationstartFired, 1,
+    'Only one animation should start.');
+}, 'Animating from display:none to display:none should not cancel the animation.');
+</script>
+
+<div id=target4>hello</div>
+<style>
+@keyframes display4 {
+  0% { display: var(--none-value); }
+  100% { display: var(--none-value); }
+}
+.animate4 {
+  animation: display4 1s infinite;
+}
+#target4 {
+  --none-value: none;
+}
+</style>
+<script>
+promise_test(async () => {
+  let numAnimationstartFired = 0;
+  target4.addEventListener('animationstart', () => numAnimationstartFired++);
+
+  await waitForAnimationFrames(1);
+  target4.classList.add('animate4');
+  await waitForAnimationFrames(2);
+
+  assert_equals(getComputedStyle(target4).display, 'none',
+    'The display should be none and the animation should keep running.');
+  assert_equals(numAnimationstartFired, 1,
+    'Only one animation should start.');
+}, 'Animating from display:none to display:none with an intermediate variable should not cancel the animation.');
+</script>
+
+<div id=target5>hello</div>
+<style>
+@keyframes display5 {
+  0% { --display: none; }
+  100% { --display: none; }
+}
+.animate5 {
+  animation: display5 1s infinite;
+}
+#target5 {
+  display: var(--display, block);
+}
+</style>
+<script>
+promise_test(async () => {
+  let numAnimationstartFired = 0;
+  target5.addEventListener('animationstart', () => numAnimationstartFired++);
+
+  await waitForAnimationFrames(1);
+  target5.classList.add('animate5');
+  await waitForAnimationFrames(2);
+
+  assert_equals(getComputedStyle(target5).display, 'none',
+    'The display should be none and the animation should keep running.');
+  assert_equals(numAnimationstartFired, 1,
+    'Only one animation should start.');
+}, 'Animating a variable of "none" which gets set to display elsewhere should not cancel the animation.');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-attachment-fixed-inline-scrolled-ref.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-attachment-fixed-inline-scrolled-ref.html
new file mode 100644
index 00000000000..1767c84a5f0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-attachment-fixed-inline-scrolled-ref.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<style>
+body {
+  /* suppress scrollbars */
+  overflow: hidden;
+}
+#target {
+  background-attachment: fixed;
+  background-image: linear-gradient(green 50%, yellow 50%);
+  font-size: 130px;
+  line-height: 100px;
+}
+</style>
+<span id="target">
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+</span>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html b/tests/wpt/web-platform-tests/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html
new file mode 100644
index 00000000000..746997d6057
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/background-attachment-fixed-inline-scrolled.html
@@ -0,0 +1,35 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+<link rel="help" href="https://www.w3.org/TR/css-backgrounds-3/#background-attachment">
+<link rel="match" href="background-attachment-fixed-inline-scrolled-ref.html">
+<meta name="assert" content="Background with background-attachment-fixed on an inline element should be fixed to the viewport">
+<style>
+body {
+  /* suppress scrollbars */
+  overflow: hidden;
+}
+#target {
+  background-attachment: fixed;
+  background-image: linear-gradient(green 50%, yellow 50%);
+  font-size: 130px;
+  line-height: 100px;
+}
+</style>
+<span id="target">
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+  &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br>
+</span>
+<script>
+requestAnimationFrame(() => {
+  requestAnimationFrame(() => {
+    scrollTo(0, 300);
+    document.documentElement.classList.remove("reftest-wait");
+  });
+});
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-break/overflow-clip-014.html b/tests/wpt/web-platform-tests/css/css-break/overflow-clip-014.html
new file mode 100644
index 00000000000..4edf112e432
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/overflow-clip-014.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1432946">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="columns:2; gap:0; width:100px; height:100px; column-fill:auto; background:red;">
+  <div style="position:relative; overflow-y:clip; height:200px;">
+    <div style="position:absolute; width:100%; height:300px;">
+      <div style="height:200px; background:green;"></div>
+      <div style="height:200px; background:red;"></div>
+    </div>
+    <div style="height:1000px; background:red;"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-break/overflow-clip-015.html b/tests/wpt/web-platform-tests/css/css-break/overflow-clip-015.html
new file mode 100644
index 00000000000..1eb114458c1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/overflow-clip-015.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1432946">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="columns:2; gap:0; width:100px; height:100px; column-fill:auto; background:red;">
+  <div style="position:relative; overflow-y:clip; height:200px;">
+    <div style="height:150px;"></div>
+    <div style="position:absolute; top:0; width:100%; height:300px;">
+      <div style="height:200px; background:green;"></div>
+      <div style="height:200px; background:red;"></div>
+    </div>
+    <div style="height:1000px; background:red;"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-break/overflow-clip-016.html b/tests/wpt/web-platform-tests/css/css-break/overflow-clip-016.html
new file mode 100644
index 00000000000..4314c0135e2
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/overflow-clip-016.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1432946">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="columns:2; gap:0; width:100px; height:100px; column-fill:auto; background:red;">
+  <div style="position:relative; overflow-y:clip; height:200px;">
+    <div style="height:150px;"></div>
+    <div style="position:absolute; top:-100px; width:100%; height:300px;">
+      <div style="height:100px; background:red;"></div>
+      <div style="height:200px; background:green;"></div>
+      <div style="height:200px; background:red;"></div>
+    </div>
+    <div style="height:1000px; background:red;"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-break/overflow-clip-017.html b/tests/wpt/web-platform-tests/css/css-break/overflow-clip-017.html
new file mode 100644
index 00000000000..1ab3cdd194f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-break/overflow-clip-017.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<link rel="author" title="Morten Stenshorne" href="mailto:mstensho@chromium.org">
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1432946">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+<div style="columns:2; gap:0; column-fill:auto; width:100px; height:100px; background:red;">
+  <div style="height:70px; background:green;"></div>
+  <div style="float:left; break-inside:avoid; width:100%; height:40px; background:green;"></div>
+  <div style="position:relative; display:flow-root; overflow-y:clip; width:100%; height:90px; background:red;">
+    <div style="height:30px; background:green;"></div>
+    <div style="height:10px;"></div>
+    <div style="position:absolute; margin-top:-30px; width:100%;">
+      <div style="height:20px; background:red;"></div>
+      <div style="height:60px; background:green;"></div>
+      <div style="height:20px; background:red;"></div>
+    </div>
+    <div style="height:1000px;"></div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-cascade/import-conditional-001.html b/tests/wpt/web-platform-tests/css/css-cascade/import-conditional-001.html
index 9bdbbcb5a32..a841f265457 100644
--- a/tests/wpt/web-platform-tests/css/css-cascade/import-conditional-001.html
+++ b/tests/wpt/web-platform-tests/css/css-cascade/import-conditional-001.html
@@ -16,8 +16,10 @@
   @import "support/test-red.css"
     (max-width: 1px), nonsense;
   div {
+    box-sizing: border-box;
     width: 100px;
     height: 100px;
+    padding: 5px; /* Avoids text antialiasing issues */
     background: red;
   }
   </style>
diff --git a/tests/wpt/web-platform-tests/css/css-cascade/import-conditions.html b/tests/wpt/web-platform-tests/css/css-cascade/import-conditions.html
index 0bb09754702..e5e1c685a9e 100644
--- a/tests/wpt/web-platform-tests/css/css-cascade/import-conditions.html
+++ b/tests/wpt/web-platform-tests/css/css-cascade/import-conditions.html
@@ -13,6 +13,34 @@
       importCondition: "supports(display:block)",
       matches: true
     },
+    {
+      importCondition: "supports((display:flex))",
+      matches: true
+    },
+    {
+      importCondition: "supports((display:block) and (display:flex))",
+      matches: true
+    },
+    {
+      importCondition: "supports((display:block) and (foo:bar))",
+      matches: false
+    },
+    {
+      importCondition: "supports((display:block) or (display:flex))",
+      matches: true
+    },
+    {
+      importCondition: "supports((display:block) or (foo:bar))",
+      matches: true
+    },
+    {
+      importCondition: "supports(not (display: flex))",
+      matches: false
+    },
+    {
+      importCondition: "supports(display: block !important)",
+      matches: true
+    },
     {
       importCondition: "supports(foo:bar)",
       matches: false
@@ -28,7 +56,49 @@
     {
       importCondition: "(width >= 0px) supports(display:block)",
       matches: false
-    }
+    },
+
+    // selector()
+    {
+      importCondition: "supports(selector(a))",
+      matches: true
+    },
+    {
+      importCondition: "supports(selector(p a))",
+      matches: true
+    },
+    {
+      importCondition: "supports(selector(p > a))",
+      matches: true
+    },
+    {
+      importCondition: "supports(selector(p + a))",
+      matches: true
+    },
+
+    // font-tech()
+    {
+      importCondition: "supports(font-tech(color-COLRv1))",
+      matches: true
+    },
+    {
+      importCondition: "supports(font-tech(invalid))",
+      matches: false
+    },
+
+    // font-format()
+    {
+      importCondition: "supports(font-format(opentype))",
+      matches: true
+    },
+    {
+      importCondition: "supports(font-format(woff))",
+      matches: true
+    },
+    {
+      importCondition: "supports(font-format(invalid))",
+      matches: false
+    },
   ];
   let target = document.getElementById("target");
   for (let testCase of testCases) {
diff --git a/tests/wpt/web-platform-tests/css/css-cascade/parsing/supports-import-parsing.html b/tests/wpt/web-platform-tests/css/css-cascade/parsing/supports-import-parsing.html
new file mode 100644
index 00000000000..58e1f7cd165
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-cascade/parsing/supports-import-parsing.html
@@ -0,0 +1,74 @@
+<!doctype html>
+<meta charset="utf-8">
+<title>@import rule with supports parsing / serialization</title>
+<link rel="author" href="mailto:oj@oojmed.com">
+<link rel="help" href="https://drafts.csswg.org/css-cascade-4/#at-import">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  function setupSheet(rule) {
+    const style = document.createElement("style");
+    document.head.append(style);
+    const {sheet} = style;
+    const {cssRules} = sheet;
+
+    assert_equals(cssRules.length, 0, "Sheet should have no rules");
+    sheet.insertRule(rule);
+    assert_equals(cssRules.length, 1, "Sheet should have 1 rule");
+
+    return {sheet, cssRules};
+  }
+
+  function test_valid_supports_import(rule, serialized) {
+    if (serialized === undefined)
+        serialized = rule;
+
+    test(function() {
+      const {sheet, cssRules} = setupSheet(rule);
+
+      const serialization = cssRules[0].cssText;
+      assert_equals(serialization, serialized, 'serialization should be canonical');
+
+      sheet.deleteRule(0);
+      assert_equals(cssRules.length, 0, 'Sheet should have no rule');
+      sheet.insertRule(serialization);
+      assert_equals(cssRules.length, 1, 'Sheet should have 1 rule');
+
+      assert_equals(cssRules[0].cssText, serialization, 'serialization should round-trip');
+    }, rule + ' should be a valid supports() import rule');
+  }
+
+  function test_invalid_supports_import(rule) {
+    test(function() {
+      const {sheet, cssRules} = setupSheet(rule);
+
+      sheet.deleteRule(0);
+      assert_equals(cssRules.length, 0, 'Sheet should have no rule');
+    }, rule + ' should still be a valid import rule with an invalid supports() declaration');
+  }
+
+  test_valid_supports_import('@import url("nonexist.css") supports();');
+  test_valid_supports_import('@import url("nonexist.css") supports(display:block);');
+  test_valid_supports_import('@import url("nonexist.css") supports((display:flex));');
+  test_valid_supports_import('@import url("nonexist.css") supports(not (display: flex));');
+  test_valid_supports_import('@import url("nonexist.css") supports((display: flex) and (display: block));');
+  test_valid_supports_import('@import url("nonexist.css") supports((display: flex) or (display: block));');
+  test_valid_supports_import('@import url("nonexist.css") supports((display: flex) or (foo: bar));');
+  test_valid_supports_import('@import url("nonexist.css") supports(display: block !important);');
+
+  test_valid_supports_import('@import url("nonexist.css") supports(selector(a));');
+  test_valid_supports_import('@import url("nonexist.css") supports(selector(p a));');
+  test_valid_supports_import('@import url("nonexist.css") supports(selector(p > a));');
+  test_valid_supports_import('@import url("nonexist.css") supports(selector(p + a));');
+
+  test_valid_supports_import('@import url("nonexist.css") supports(font-tech(color-colrv1));');
+  test_valid_supports_import('@import url("nonexist.css") supports(font-format(opentype));');
+
+  test_valid_supports_import('@import url(nonexist.css) supports(display:block);',
+                             '@import url("nonexist.css") supports(display:block);');
+
+  test_valid_supports_import('@import "nonexist.css" supports(display:block);',
+                             '@import url("nonexist.css") supports(display:block);');
+
+  test_invalid_supports_import('@import url("nonexist.css") supports;');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/abspos/dynamic-align-self-001.html b/tests/wpt/web-platform-tests/css/css-flexbox/abspos/dynamic-align-self-001.html
new file mode 100644
index 00000000000..208c006d2d0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/abspos/dynamic-align-self-001.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
+<link rel="help" href="https://crbug.com/1306037">
+<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
+<meta name="assert"
+  content="Abspos child of a flexbox moves after script changes its alignment.">
+<style>
+  #reference-overlapped-red {
+    position: absolute;
+    background-color: red;
+    width: 100px;
+    height: 100px;
+    z-index: -1;
+  }
+
+  #parent {
+    position: relative;
+    display: flex;
+    width: 200px;
+    height: 200px;
+  }
+
+  #child {
+    display: flex;
+    position: absolute;
+    width: 100px;
+    height: 100px;
+    background-color: green;
+    align-self: end;
+  }
+
+</style>
+
+<p>Test passes if there is a filled green square and <strong>no red</strong>.
+</p>
+
+<div id=reference-overlapped-red></div>
+
+<div id="parent">
+  <div id="child"></div>
+</div>
+
+<script>
+  document.body.offsetTop;
+  child.style.alignSelf = 'start';
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/fieldset-as-container-justify-center.tentative.html b/tests/wpt/web-platform-tests/css/css-flexbox/fieldset-as-container-justify-center.tentative.html
new file mode 100644
index 00000000000..a1d7564e8a7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/fieldset-as-container-justify-center.tentative.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
+<link rel="help" href="https://crbug.com/1229458">
+<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/8690">
+<link rel="help" href="https://github.com/whatwg/html/issues/9123">
+<link rel="help"
+  href="https://html.spec.whatwg.org/multipage/rendering.html#anonymous-fieldset-content-box">
+<meta name="assert"
+  content="justify-content: center is ignored in a column flexbox fieldset when the anonymous fieldset content box has no height or min-height.">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+
+<style>
+  fieldset {
+    display: flex;
+    flex-flow: column;
+    justify-content: center;
+    align-items: center;
+    width: 200px;
+    min-height: 200px;
+    padding: 0px;
+    border: 1px solid;
+    position: relative;
+  }
+
+  .item {
+    height: 100px;
+    width: 100px;
+    background: orange;
+  }
+
+</style>
+<p>Pass Condition: orange square is at top of black square.<br>
+  Safari 16.4 and Firefox 111 fail -- orange box is vertically centered as if
+  the anonymous fieldset content box and the fieldset were the same box.
+</p>
+
+<fieldset>
+  <div class="item" data-offset-y="0"></div>
+</fieldset>
+
+<script>
+  checkLayout('.item');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/flex-aspect-ratio-img-row-017.html b/tests/wpt/web-platform-tests/css/css-flexbox/flex-aspect-ratio-img-row-017.html
new file mode 100644
index 00000000000..b2408159b5a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/flex-aspect-ratio-img-row-017.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1700474">
+<link rel="help" href="https://crbug.com/1337056">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht" />
+<meta name="assert"
+  content="specified size suggestion obeys item's resolvable % main size">
+
+<style>
+  #reference-overlapped-red {
+    position: absolute;
+    background-color: red;
+    width: 100px;
+    height: 100px;
+    z-index: -1;
+  }
+
+</style>
+
+<p>Test passes if there is a filled green square and <strong>no red</strong>.
+</p>
+
+<div id="reference-overlapped-red"></div>
+
+<div style="display: flex; width: 100px;">
+  <img src="support/100x100-green.png" style="width: 100%; flex: 0 0 10px;">
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/grandchild-span-height.html b/tests/wpt/web-platform-tests/css/css-flexbox/grandchild-span-height.html
new file mode 100644
index 00000000000..c087edb68d4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/grandchild-span-height.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<meta name="flags" content="asis" />
+<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1601626">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+
+<style>
+  #reference-overlapped-red {
+    position: absolute;
+    background-color: red;
+    width: 100px;
+    height: 100px;
+    z-index: -1;
+  }
+
+</style>
+<p>Test passes if there is a filled green square and <strong>no red</strong>.
+</p>
+
+<div id=reference-overlapped-red></div>
+
+<!-- Firefox 111 gives the green square too much height. 111px on my system. -->
+
+<div style="display: flex;">
+  <div style="background-color: green; line-height: 10px;">
+    <span style="margin-left: 1px">
+      <div style="display:inline-block; width: 99px; height: 100px"></div>
+      <!-- the html comments are necessary to trigger the bug -->
+      <!-- -->
+    </span>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/grid-flex-item-007.html b/tests/wpt/web-platform-tests/css/css-flexbox/grid-flex-item-007.html
new file mode 100644
index 00000000000..bdea17d0692
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/grid-flex-item-007.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
+<link rel="help"
+  href="https://drafts.csswg.org/css-flexbox-1/#valdef-flex-direction-column">
+<link rel="help" href="https://webkit.org/b/226522">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<meta name="assert"
+  content="Column flexboxes with indefinite heights don't mess up positioning of descendant grid items.">
+
+<style>
+  #reference-overlapped-red {
+    position: absolute;
+    background-color: red;
+    width: 100px;
+    height: 100px;
+    z-index: -1;
+  }
+
+</style>
+<p>Test passes if there is a filled green square and <strong>no red</strong>.
+</p>
+<div id=reference-overlapped-red></div>
+
+<body style="height: 400px;">
+  <div style="display: flex; flex-direction: column;">
+    <div style="display: grid; align-items: center; height: 100%;">
+      <div style="width:100px; height: 100px; background: green;"></div>
+    </div>
+  </div>
+</body>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/justify-content-007.html b/tests/wpt/web-platform-tests/css/css-flexbox/justify-content-007.html
new file mode 100644
index 00000000000..2ce9177a766
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/justify-content-007.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
+<link rel="help"
+  href="https://drafts.csswg.org/css-flexbox/#justify-content-property">
+<link rel="help" href="https://crbug.com/1228023">
+<meta name="assert"
+  content="Wrapped item obeys justify-content:center when the item wraps because the container has max-height.">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/check-layout-th.js"></script>
+
+<style>
+  .flexitem {
+    width: 100px;
+  }
+
+</style>
+
+Pass condition: orange square is vertically centered in the black box.<br>
+Chrome 112 and Safari 16.4 fail. Firefox 111 passes.
+<div
+  style="display: flex; flex-flow: column wrap; max-height: 200px; justify-content: center; align-content: start; border: 2px solid; position: relative;">
+  <div class=flexitem style="background: blue; height: 200px;"></div>
+  <div class=flexitem style="background: orange; height: 100px;"
+    data-offset-y=50></div>
+</div>
+
+<script>
+  checkLayout('.flexitem + .flexitem');
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/table-as-flex-item-max-content.html b/tests/wpt/web-platform-tests/css/css-flexbox/table-as-flex-item-max-content.html
new file mode 100644
index 00000000000..c7316aab950
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/table-as-flex-item-max-content.html
@@ -0,0 +1,37 @@
+<!DOCTYPE html>
+<link rel="author" title="David Grogan" href="mailto:dgrogan@chromium.org">
+<link rel="help"
+  href="https://drafts.csswg.org/css-flexbox/#intrinsic-cross-sizes">
+<link rel="help" href="https://webkit.org/b/253922">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+<meta name="assert"
+  content="A table's max-content width is used for its parent flexbox's max-content calculation. Safari 16.4 uses min-content width.">
+
+<style>
+  #reference-overlapped-red {
+    position: absolute;
+    background-color: red;
+    width: 100px;
+    height: 100px;
+    z-index: -1;
+  }
+
+  .inline-block {
+    float: left;
+    width: 50px;
+  }
+
+</style>
+<p>Test passes if there is a filled green square and <strong>no red</strong>.
+</p>
+
+<div id=reference-overlapped-red></div>
+<div
+  style="display: flex; flex-direction: column; height: 100px; width: max-content; background-color: green;">
+  <div style="display: table">
+    <div style="display: table-cell">
+      <div class="inline-block"></div>
+      <div class="inline-block"></div>
+    </div>
+  </div>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/auto-track-sizing-001-ref.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/auto-track-sizing-001-ref.html
index 800f87e5d00..81c6d184021 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/subgrid/auto-track-sizing-001-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/auto-track-sizing-001-ref.html
@@ -50,13 +50,13 @@ html,body {
 </article>
 
 <article class="grid" style="grid-template-columns: auto 100px auto">
-  <div class="subgrid" style="grid-column:2 span 2">
+  <div class="subgrid" style="grid-column:2 / span 2">
     The cat can not be separated from milk
   </div>
 </article>
 
 <article class="grid" style="grid-template-columns: auto 100px auto">
-  <div class="subgrid" style="grid-column:1 span 3">
+  <div class="subgrid" style="grid-column:1 / span 3">
     The cat can not be separated from milk
   </div>
 </article>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/auto-track-sizing-001.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/auto-track-sizing-001.html
index 0fdb9b0b7e2..4a946e6feb4 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/subgrid/auto-track-sizing-001.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/auto-track-sizing-001.html
@@ -53,13 +53,13 @@ html,body {
 </article>
 
 <article class="grid" style="grid-template-columns: auto 100px auto">
-  <div class="subgrid" style="grid-column:2 span 2">
+  <div class="subgrid" style="grid-column:2 / span 2">
     The cat can not be separated from milk
   </div>
 </article>
 
 <article class="grid" style="grid-template-columns: auto 100px auto">
-  <div class="subgrid" style="grid-column:1 span 3">
+  <div class="subgrid" style="grid-column:1 / span 3">
     The cat can not be separated from milk
   </div>
 </article>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/independent-formatting-context-ref.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/independent-formatting-context-ref.html
index 79b90c340d8..fe842b28238 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/subgrid/independent-formatting-context-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/independent-formatting-context-ref.html
@@ -5,12 +5,13 @@
 -->
 <html><head>
   <meta charset="utf-8">
-  <title>Test: subgrid disabled if grid item establishes independent formatting context</title>
+  <title>Reference: subgrid disabled if grid item establishes independent formatting context</title>
   <link rel="author" title="Matt Woodrow" href="https://bugs.webkit.org/show_bug.cgi?id=237692">
   <link rel="help" href="https://drafts.csswg.org/css-grid-2/#subgrid-listing">
   <style>
+
 html,body {
-  color:black; background-color:white; font:16px/1 monospace; padding:0; margin:0;
+  font:16px/1 monospace; padding:0; margin:0; line-height: 0;
 }
 
 .grid {
@@ -31,5 +32,22 @@ html,body {
 <div class="grid">
 </div>
 
+<div class="grid">
+</div>
+
+<div class="grid">
+</div>
+
+<div class="grid">
+</div>
+
+<div class="grid">
+</div>
+
+<div class="grid">
+</div>
+
+<div class="grid">
+</div>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/css-grid/subgrid/independent-formatting-context.html b/tests/wpt/web-platform-tests/css/css-grid/subgrid/independent-formatting-context.html
index 888b23c2f62..5a76ac2d6de 100644
--- a/tests/wpt/web-platform-tests/css/css-grid/subgrid/independent-formatting-context.html
+++ b/tests/wpt/web-platform-tests/css/css-grid/subgrid/independent-formatting-context.html
@@ -10,8 +10,9 @@
   <link rel="help" href="https://drafts.csswg.org/css-grid-2/#subgrid-listing">
   <link rel="match" href="independent-formatting-context-ref.html">
   <style>
+
 html,body {
-  color:black; background-color:white; font:16px/1 monospace; padding:0; margin:0;
+  font:16px/1 monospace; padding:0; margin:0; line-height: 0;
 }
 
 .grid {
@@ -32,19 +33,20 @@ html,body {
 }
 
 .first {
-  background-color: green;
   grid-row: 1;
+  background-color: green;
 }
 
 .second {
-  background-color: red;
   grid-row: 2;
+  background-color: green;
 }
 
   </style>
 </head>
 <body>
-
+<!-- The subgrid's style attribute establishes an independent formatting context
+      and makes them no longer eligible as subgrids.-->
 <div class="grid">
   <div class="subgrid" style="position:absolute">
     <div class="first"></div>
@@ -57,5 +59,43 @@ html,body {
   </div>
 </div>
 
+<div class="grid">
+  <div class="subgrid" style="contain: paint">
+    <div class="first"></div>
+  </div>
+</div>
+
+<div class="grid">
+  <div class="subgrid" style="contain: strict">
+    <div class="first"></div>
+  </div>
+</div>
+
+<div class="grid">
+  <div class="subgrid" style="contain: content">
+    <div class="first"></div>
+  </div>
+</div>
+
+<!-- Only layout and paint containment establish an independent formatting
+      context. These tests validate that other types of containment maintain
+      subgrid layout.-->
+<div class="grid">
+  <div class="subgrid" style="contain: none">
+    <div class="second"></div>
+  </div>
+</div>
+
+<div class="grid">
+  <div class="subgrid" style="contain: size">
+    <div class="second"></div>
+  </div>
+</div>
+
+<div class="grid">
+  <div class="subgrid" style="contain: style">
+    <div class="second"></div>
+  </div>
+</div>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-cross-origin.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-cross-origin.html
index e36c1295d31..ec139d4e229 100644
--- a/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-cross-origin.html
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/image-orientation-none-cross-origin.html
@@ -22,7 +22,7 @@
 <body>
     <p>The following images should not be identical.</p>
     <p>The image should not rotate respecting their EXIF orientation because
-       image-orientation: none is specified.</p>
+       image-orientation: none is specified and the request is same origin.</p>
     <div><img src="support/exif-orientation-3-lr.jpg"/></div>
 
     <p>This image should rotate respecting their EXIF orientation because
@@ -30,16 +30,25 @@
     <div><img id="corsImage" src="support/exif-orientation-3-lr.jpg"/></div>
 
     <p>The image should not rotate respecting their EXIF orientation because
-       image-orientation: none is specified.</p>
+       image-orientation: none is specified and the request is CORS anonymous.</p>
+    <div><img id="corsAnonymousImg" crossorigin="anonymous" src="support/exif-orientation-3-lr.jpg"/></div>
+
+    <p>The image should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified and the request is CORS
+       use-credentials.</p>
+    <div><img id="corsUseCredsImg" crossorigin="use-credentials" src="support/exif-orientation-3-lr.jpg"/></div>
+
+    <p>The image should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified and the image source is a blob.</p>
     <div><img id="blobImage"/></div>
 
     <p>The image should not rotate respecting their EXIF orientation because
-       image-orientation: none is specified.</p>
+       image-orientation: none is specified and the image source is a data url.</p>
     <div><img id="dataImage"/></div>
 </body>
 <script>
   const testImage = 'support/exif-orientation-3-lr.jpg';
-  let sPendingImagesToLoad = 3;
+  let sPendingImagesToLoad = 5;
 
   function pendingImageLoaded() {
     if (!--sPendingImagesToLoad) {
@@ -51,6 +60,19 @@
   img.onload = pendingImageLoaded;
   img.src = img.src.replace(new URL(img.src).origin, get_host_info().HTTP_REMOTE_ORIGIN)
 
+  const corsAnonImg = document.getElementById('corsAnonymousImg')
+  corsAnonImg.onload = pendingImageLoaded;
+  corsAnonImg.src = corsAnonImg.src.replace(new URL(corsAnonImg.src).origin,
+                                            get_host_info().HTTP_REMOTE_ORIGIN)
+    + "?pipe=header(Access-Control-Allow-Origin,*)";
+
+  const corsUseCredsImg = document.getElementById('corsUseCredsImg')
+  corsUseCredsImg.onload = pendingImageLoaded;
+  corsUseCredsImg.src = corsUseCredsImg.src.replace(new URL(corsUseCredsImg.src).origin,
+                                                    get_host_info().HTTP_REMOTE_ORIGIN)
+    + "?pipe=header(Access-Control-Allow-Credentials,true)"
+    + "|header(Access-Control-Allow-Origin," + location.origin + ")";
+
   const blobImg = document.getElementById('blobImage');
   fetch(testImage).then((resp) => {
     return resp.blob();
diff --git a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-cross-origin-ref.html b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-cross-origin-ref.html
index c4d72fc823f..a54aa3870f6 100644
--- a/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-cross-origin-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-images/image-orientation/reference/image-orientation-none-cross-origin-ref.html
@@ -19,7 +19,7 @@
 <body>
     <p>The following images should not be identical.</p>
     <p>The image should not rotate respecting their EXIF orientation because
-       image-orientation: none is specified.</p>
+       image-orientation: none is specified and the request is same origin.</p>
     <div><img src="../support/exif-orientation-3-lr.jpg"/></div>
 
     <p>This image should rotate respecting their EXIF orientation because
@@ -27,11 +27,20 @@
     <div><img src="../support/exif-orientation-3-lr.jpg" style="image-orientation: from-image" /></div>
 
     <p>The image should not rotate respecting their EXIF orientation because
-       image-orientation: none is specified.</p>
+       image-orientation: none is specified and the request is CORS anonymous.</p>
     <div><img src="../support/exif-orientation-3-lr.jpg"/></div>
 
     <p>The image should not rotate respecting their EXIF orientation because
-       image-orientation: none is specified.</p>
+       image-orientation: none is specified and the request is CORS
+       use-credentials.</p>
+    <div><img src="../support/exif-orientation-3-lr.jpg"/></div>
+
+    <p>The image should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified and the image source is a blob.</p>
+    <div><img src="../support/exif-orientation-3-lr.jpg"/></div>
+
+    <p>The image should not rotate respecting their EXIF orientation because
+       image-orientation: none is specified and the image source is a data url.</p>
     <div><img src="../support/exif-orientation-3-lr.jpg"/></div>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/css/css-inline/text-box-trim/text-box-trim-valid.html b/tests/wpt/web-platform-tests/css/css-inline/text-box-trim/text-box-trim-valid.html
index 1ce4ceb1074..61622774f6f 100644
--- a/tests/wpt/web-platform-tests/css/css-inline/text-box-trim/text-box-trim-valid.html
+++ b/tests/wpt/web-platform-tests/css/css-inline/text-box-trim/text-box-trim-valid.html
@@ -5,7 +5,7 @@
 <script src="/css/support/parsing-testcommon.js"></script>
 
 <script>
-test_valid_value('text-box-trim', 'normal');
+test_valid_value('text-box-trim', 'none');
 test_valid_value('text-box-trim', 'start');
 test_valid_value('text-box-trim', 'end');
 test_valid_value('text-box-trim', 'both');
diff --git a/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-computed.html b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-computed.html
new file mode 100644
index 00000000000..f1a0a315de6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-computed.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<title>CSS Positioned Layout Module Test: getComputedStyle().overlay</title>
+<link rel="help" href="https://drafts.csswg.org/css-position-4/#overlay">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<div id="target"></div>
+<script>
+  test_computed_value("overlay", "none", "none");
+  // 'auto' also computes to 'none' due to this UA style while the element is
+  // not in the top layer:
+  //
+  // * { overlay: none !important }
+  test_computed_value("overlay", "auto", "none");
+  test_computed_value("overlay", "inherit", "none");
+  test_computed_value("overlay", "initial", "none");
+  test_computed_value("overlay", "revert", "none");
+  test_computed_value("overlay", "unset", "none");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-invalid.html b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-invalid.html
new file mode 100644
index 00000000000..e84d0c8a6b0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-invalid.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<title>CSS Positioned Layout Module Test: parsing overlay with invalid values</title>
+<link rel="help" href="https://drafts.csswg.org/css-position-4/#overlay">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+<script>
+  // overlay: none | auto
+  test_invalid_value("overlay", "browser");
+  test_invalid_value("overlay", "normal");
+  test_invalid_value("overlay", "none auto");
+  test_invalid_value("overlay", "none, auto");
+  test_invalid_value("overlay", "\'auto\'");
+  test_invalid_value("overlay", "\'none\'");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-transition-property.html b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-transition-property.html
new file mode 100644
index 00000000000..a667f26ea6a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-transition-property.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<title>CSS Positioned Layout Module Test: 'overlay' is a valid transition-property value</title>
+<link rel="help" href="https://drafts.csswg.org/css-position-4/#overlay">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<div id="target"></div>
+<script>
+  test_valid_value("transition-property", "overlay");
+  test_valid_value("transition", "overlay 2s", "overlay 2s ease 0s");
+
+  test_computed_value("transition-property", "overlay");
+  test_computed_value("transition", "overlay 1s", "overlay 1s ease 0s");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-valid.html b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-valid.html
new file mode 100644
index 00000000000..8d808ac6dcf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-position/overlay/overlay-valid.html
@@ -0,0 +1,15 @@
+<!DOCTYPE html>
+<title>CSS Positioned Layout Module Test: parsing overlay with valid values</title>
+<link rel="help" href="https://drafts.csswg.org/css-position-4/#overlay">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/parsing-testcommon.js"></script>
+<script>
+  // overlay: none | auto
+  test_valid_value("overlay", "none");
+  test_valid_value("overlay", "auto");
+  test_valid_value("overlay", "inherit");
+  test_valid_value("overlay", "initial");
+  test_valid_value("overlay", "revert");
+  test_valid_value("overlay", "unset");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-view-transitions/root-element-cv-hidden-crash.html b/tests/wpt/web-platform-tests/css/css-view-transitions/root-element-cv-hidden-crash.html
new file mode 100644
index 00000000000..890194b7c17
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-view-transitions/root-element-cv-hidden-crash.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<title>View transitions: content-visibility:hidden on root element crash</title>
+<link rel="help" href="https://crbug.com/1429947">
+<style>
+  html {
+    content-visibility: hidden;
+  }
+</style>
+<script>
+  document.startViewTransition();
+</script>
diff --git a/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-noscript-ref.html b/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-noscript-ref.html
new file mode 100644
index 00000000000..2dd7aff8313
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-noscript-ref.html
@@ -0,0 +1,4 @@
+<!DOCTYPE html>
+<noscript>
+  Script is disabled
+</noscript>
diff --git a/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-noscript.html b/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-noscript.html
new file mode 100644
index 00000000000..1d1af708fd7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-noscript.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/mediaqueries/#scripting">
+<link rel="match" href="scripting-print-noscript-ref.html">
+<style>
+  @media (scripting) {
+    #noscript {
+      display: none;
+    }
+  }
+</style>
+<div id="noscript">
+  Script is disabled
+</div>
diff --git a/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-script-ref.html b/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-script-ref.html
new file mode 100644
index 00000000000..d2da3f84058
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-script-ref.html
@@ -0,0 +1,4 @@
+<!DOCTYPE html>
+<div>
+  Script is enabled
+</div>
diff --git a/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-script.html b/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-script.html
new file mode 100644
index 00000000000..e80dba4d83f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/mediaqueries/scripting-print-script.html
@@ -0,0 +1,17 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/mediaqueries/#scripting">
+<link rel="match" href="scripting-print-script-ref.html">
+<style>
+  #script {
+    display: none;
+  }
+
+  @media (scripting) {
+    #script {
+      display: block;
+    }
+  }
+</style>
+<div id="script">
+  Script is enabled
+</div>
diff --git a/tests/wpt/web-platform-tests/css/mediaqueries/scripting.html b/tests/wpt/web-platform-tests/css/mediaqueries/scripting.html
new file mode 100644
index 00000000000..de047cb463c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/mediaqueries/scripting.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<link rel="help" href="https://drafts.csswg.org/mediaqueries-5/#scripting">
+<script type="text/javascript" src="/resources/testharness.js"></script>
+<script type="text/javascript" src="/resources/testharnessreport.js"></script>
+<script type="text/javascript" src="resources/matchmedia-utils.js"></script>
+
+<script>
+query_should_be_known("(scripting)");
+query_should_be_known("(scripting: enabled)");
+query_should_be_known("(scripting: initial-only)");
+query_should_be_known("(scripting: none)");
+
+query_should_be_unknown("(scripting: 0)");
+query_should_be_unknown("(scripting: 10px)");
+query_should_be_unknown("(scripting: invalid)");
+
+test(() => {
+  let match_enabled = window.matchMedia("(scripting: enabled)");
+  assert_true(match_enabled.matches);
+}, "Check that scripting currently matches 'enabled'");
+
+test(() => {
+  let booleanContext = window.matchMedia("(scripting)");
+  assert_true(booleanContext.matches);
+}, "Check that scripting currently evaluates to true in the boolean context");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/selectors/i18n/css3-selectors-lang-014.html b/tests/wpt/web-platform-tests/css/selectors/i18n/css3-selectors-lang-014.html
index 5e68d50d5a0..411d50d35e5 100644
--- a/tests/wpt/web-platform-tests/css/selectors/i18n/css3-selectors-lang-014.html
+++ b/tests/wpt/web-platform-tests/css/selectors/i18n/css3-selectors-lang-014.html
@@ -28,8 +28,8 @@ This tests a detail related to :lang support. If :lang is not supported, a messa
 <script>
 test(function() {
 assert_equals(document.getElementById('colonlangcontroltest').offsetWidth, 0)
-assert_equals(document.getElementById('box').offsetWidth, 50);
-}, "A :lang value with language and region subtags will NOT match a lang attribute value with language, script and region subtags.");
+assert_in_array(document.getElementById('box').offsetWidth, [50, 100]);
+}, "A :lang value with language and region subtags will match a lang attribute value with language, script and region subtags under CSS Selectors 4, but not Selectors 3.");
 </script>
 
 <div id='log'></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-000-ref.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-000-ref.html
new file mode 100644
index 00000000000..466e9f464b9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-000-ref.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching reference</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+
+<style>
+div.test { color: green; }
+</style>
+
+<div class="test">This should be green</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-000.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-000.html
new file mode 100644
index 00000000000..1d66bebbc6b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-000.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+:lang(en-US) { color: green; }
+</style>
+
+<div class="test">This should be green</div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-001.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-001.html
new file mode 100644
index 00000000000..908643fca81
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-001.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang(fr) { color: green; }
+</style>
+
+<div class="test"><span lang="fr">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-002.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-002.html
new file mode 100644
index 00000000000..0be426c66e7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-002.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang("FR") { color: green; }
+</style>
+
+<div class="test"><span lang="fr">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-003.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-003.html
new file mode 100644
index 00000000000..a3e5340b6e9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-003.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang("Fr") { color: green; }
+</style>
+
+<div class="test"><span lang="fR">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-004.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-004.html
new file mode 100644
index 00000000000..d5929972707
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-004.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang("fr") { color: green; }
+</style>
+
+<div class="test"><span lang="fr-CH">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-005.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-005.html
new file mode 100644
index 00000000000..816dfc9b503
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-005.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: green; }
+:lang("fr-CH") { color: red; }
+</style>
+
+<div class="test"><span lang="fr">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-006.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-006.html
new file mode 100644
index 00000000000..d249a4c8c06
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-006.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: green; }
+:lang("fr-CH") { color: red; }
+</style>
+
+<div class="test"><span lang="fr-FR">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-007.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-007.html
new file mode 100644
index 00000000000..a21506d94c1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-007.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang("*-CH") { color: green; }
+</style>
+
+<div class="test"><span lang="fr-CH">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-008.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-008.html
new file mode 100644
index 00000000000..77f77a884ac
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-008.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang("*-Latn") { color: green; }
+</style>
+
+<div class="test"><span lang="fr-Latn-FR">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-009.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-009.html
new file mode 100644
index 00000000000..bf2e9883916
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-009.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang("fr-FR") { color: green; }
+</style>
+
+<div class="test"><span lang="fr-Latn-FR">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-010.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-010.html
new file mode 100644
index 00000000000..081c9207add
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-010.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang("*-FR") { color: green; }
+</style>
+
+<div class="test"><span lang="fr-Latn-FR">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-011.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-011.html
new file mode 100644
index 00000000000..5620317a14b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-011.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang("fr", "nl", "de") { color: green; }
+</style>
+
+<div class="test"><span lang="fr-Latn-FR">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-012.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-012.html
new file mode 100644
index 00000000000..f299e22eaec
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-012.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang(de, nl, fr) { color: green; }
+</style>
+
+<div class="test"><span lang="fr-Latn-FR">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-013.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-013.html
new file mode 100644
index 00000000000..34303d97805
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-013.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: green; }
+:lang(de, nl, 0, fr) { color: red; }
+</style>
+
+<div class="test"><span lang="fr">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-014.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-014.html
new file mode 100644
index 00000000000..2d064c8d29b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-014.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: green; }
+:lang(0) { color: red; }
+</style>
+
+<div class="test"><span lang="0">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-015.html b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-015.html
new file mode 100644
index 00000000000..4d90b080f39
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-4/lang-015.html
@@ -0,0 +1,14 @@
+<!DOCTYPE html>
+<html lang="en-US">
+<meta charset="utf-8">
+<title>CSS Selectors 4 - :lang matching</title>
+<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
+<link rel="help" href="https://drafts.csswg.org/selectors-4/#the-lang-pseudo">
+<link rel="match" href="lang-000-ref.html">
+
+<style>
+div.test { color: red; }
+:lang(\*-FR) { color: green; }
+</style>
+
+<div class="test"><span lang="fr-Latn-FR">This should be green</span></div>
diff --git a/tests/wpt/web-platform-tests/dom/events/scrolling/scrollend-event-fired-to-element-with-overscroll-behavior.html b/tests/wpt/web-platform-tests/dom/events/scrolling/scrollend-event-fired-to-element-with-overscroll-behavior.html
index acad168e56c..edda88e7cb2 100644
--- a/tests/wpt/web-platform-tests/dom/events/scrolling/scrollend-event-fired-to-element-with-overscroll-behavior.html
+++ b/tests/wpt/web-platform-tests/dom/events/scrolling/scrollend-event-fired-to-element-with-overscroll-behavior.html
@@ -7,96 +7,167 @@
 <script src="/resources/testdriver-vendor.js"></script>
 <script src="scroll_support.js"></script>
 <style>
-#overscrollXDiv {
-  width: 600px;
-  height: 600px;
-  overflow: scroll;
-  overscroll-behavior-x: contain;
-}
-#overscrollYDiv {
-  width: 500px;
-  height: 500px;
-  overflow: scroll;
-  overscroll-behavior-y: none;
-}
-#targetDiv {
-  width: 400px;
-  height: 400px;
-  overflow: scroll;
-}
-.content {
-  width:800px;
-  height:800px;
-}
+  #overscrollXDiv {
+    width: 200px;
+    height: 200px;
+    overflow: scroll;
+    overscroll-behavior-x: contain;
+    border: solid 1px black;
+    display: grid;
+    /* Places content and targetXDiv beside each other. */
+    grid-template-columns: 500px 100px;
+  }
+
+  #overscrollYDiv {
+    width: 200px;
+    height: 200px;
+    overflow: scroll;
+    overscroll-behavior-y: none;
+    border: solid 1px black;
+  }
+
+  #targetXDiv {
+    width: 100px;
+    height: 100px;
+    overflow: scroll;
+    border: solid 1px black;
+  }
+
+  #targetYDiv {
+    width: 100px;
+    height: 100px;
+    overflow: scroll;
+    border: solid 1px black;
+  }
+
+  .content {
+    width: 500px;
+    height: 500px;
+  }
+
+  #spacer {
+    height: 200vh;
+    width: 200vw;
+    border: solid 1px black;
+  }
 </style>
 
 <body style="margin:0" onload=runTest()>
-<div id="overscrollXDiv">
-  <div class=content>
-    <div id="overscrollYDiv">
-      <div class=content>
-        <div id="targetDiv">
-          <div class="content">
-          </div>
-        </div>
+  <div id="overscrollXDiv">
+    <div class="content"></div>
+    <div id="targetXDiv">
+      <div class="content">
       </div>
     </div>
   </div>
-</div>
+  <div id="overscrollYDiv">
+    <div class="content"></div>
+    <!-- Place targetYDiv below content so that is in view when
+         overscrollYDiv is scrolled all the way down -->
+    <div id="targetYDiv">
+      <div class="content">
+      </div>
+    </div>
+  </div>
+  <div id="spacer"></div>
 </body>
 
 <script>
-var target_div = document.getElementById('targetDiv');
-var horizontal_scrollend_arrived = false;
-var vertical_scrollend_arrived = false;
-function onHorizontalScrollEnd(event) {
-  assert_false(event.cancelable);
-  assert_false(event.bubbles);
-  horizontal_scrollend_arrived = true;
-}
-function onVerticalScrollEnd(event) {
-  assert_false(event.cancelable);
-  assert_false(event.bubbles);
-  vertical_scrollend_arrived = true;
-}
-// Test that both "onscrollend" and addEventListener("scrollend"... work.
-document.getElementById('overscrollXDiv').onscrollend = onHorizontalScrollEnd;
-document.getElementById('overscrollYDiv').
+  var horizontal_scrollend_arrived = false;
+  var vertical_scrollend_arrived = false;
+  let scrollers = [document.scrollingElement, targetXDiv, targetYDiv,
+                   overscrollXDiv, overscrollYDiv];
+
+  async function resetScrollers(test) {
+    for (const scroller of scrollers) {
+      await resetTargetScrollState(test, scroller);
+    }
+  }
+  function onHorizontalScrollEnd(event) {
+    assert_false(event.cancelable);
+    assert_false(event.bubbles);
+    horizontal_scrollend_arrived = true;
+  }
+  function onVerticalScrollEnd(event) {
+    assert_false(event.cancelable);
+    assert_false(event.bubbles);
+    vertical_scrollend_arrived = true;
+  }
+  // Test that both "onscrollend" and addEventListener("scrollend"... work.
+  document.getElementById('overscrollXDiv').onscrollend = onHorizontalScrollEnd;
+  document.getElementById('overscrollYDiv').
     addEventListener("scrollend", onVerticalScrollEnd);
 
-function runTest() {
-  promise_test (async (t) => {
-    // Make sure that no scrollend event is sent to document or target_div.
-    document.addEventListener("scrollend",
-        t.unreached_func("Document got unexpected scrollend event."));
-    target_div.addEventListener("scrollend",
-        t.unreached_func("target_div got unexpected scrollend event."));
-    await waitForCompositorCommit();
+  function runTest() {
+    promise_test(async (t) => {
+      await resetScrollers(t);
+      await waitForCompositorCommit();
 
-    // Scroll left on target div and wait for the element with overscroll-x to
-    // get scrollend event.
-    await touchScrollInTarget(300, target_div, 'left');
-    await waitFor(() => { return horizontal_scrollend_arrived; },
-        'Expected element did not receive scrollend event after scroll left ' +
-        'on target.');
-    assert_equals(target_div.scrollLeft, 0);
+      // Make sure that no scrollend event is sent to document.
+      document.addEventListener("scrollend",
+      t.unreached_func("Document got unexpected scrollend event."));
+      let scrollend_promise;
 
-    let touchEndPromise = new Promise((resolve) => {
-      target_div.addEventListener("touchend", resolve);
-    });
-    await touchScrollInTarget(300, target_div, 'up');
+      scrollend_promise = waitForScrollendEvent(t, targetXDiv, 2000);
+      targetXDiv.scrollLeft = targetXDiv.scrollWidth;
+      await scrollend_promise;
 
-    // The scrollend event should never be fired before the gesture has completed.
-    await touchEndPromise;
+      scrollend_promise = waitForScrollendEvent(t, overscrollXDiv, 2000);
+      overscrollXDiv.scrollLeft = overscrollXDiv.scrollWidth;
+      await scrollend_promise;
+      horizontal_scrollend_arrived = false;
 
-    // Ensure we wait at least a tick after the touch end.
-    await waitForCompositorCommit();
+      assert_equals(targetXDiv.scrollLeft,
+                    targetXDiv.scrollWidth - targetXDiv.clientWidth);
+      assert_equals(overscrollXDiv.scrollLeft,
+                    overscrollXDiv.scrollWidth - overscrollXDiv.clientWidth);
+      // Attempt to scroll targetXDiv further to the right.
+      // targetXDiv and overscrollXDiv are already fully scrolled right but the
+      // scroll should not propagate to the document because of
+      // overscroll-behavior-x: contain on overscrollXDiv.
+      let touchEndPromise = new Promise((resolve) => {
+        targetXDiv.addEventListener("touchend", resolve);
+      });
+      await touchScrollInTarget(100, targetXDiv, 'right');
+      // The scrollend event should never be fired before the gesture has
+      // completed.
+      await touchEndPromise;
 
-    // We should not trigger a scrollend event for a scroll that did not change
-    // the scroll position.
-    assert_equals(vertical_scrollend_arrived, false);
-    assert_equals(target_div.scrollTop, 0);
-  }, 'Tests that the last element in the cut scroll chain gets scrollend ' +
-     'event when no element scrolls by touch.');
-}
+      scrollend_promise = waitForScrollendEvent(t, targetYDiv, 2000);
+      targetYDiv.scrollTop = targetXDiv.scrollHeight;
+      await scrollend_promise;
+
+      scrollend_promise = waitForScrollendEvent(t, overscrollYDiv, 2000);
+      overscrollYDiv.scrollTop = overscrollYDiv.scrollHeight;
+      await scrollend_promise;
+      vertical_scrollend_arrived = false;
+
+      assert_equals(targetYDiv.scrollTop,
+                    targetYDiv.scrollHeight - targetYDiv.clientHeight);
+      assert_equals(overscrollYDiv.scrollTop,
+                    overscrollYDiv.scrollHeight - overscrollYDiv.clientHeight);
+      // Attempt to scroll targetYDiv further down.
+      // targetYDiv and overscrollYDiv are already fully scrolled down but the
+      // scroll should not propagate to the document because of
+      // overscroll-behavior-y: none on overscrollYDiv.
+      touchEndPromise = new Promise((resolve) => {
+        targetYDiv.addEventListener("touchend", resolve);
+      });
+      await touchScrollInTarget(50, targetYDiv, 'down');
+      // The scrollend event should never be fired before the gesture has
+      // completed.
+      await touchEndPromise;
+
+      // Ensure we wait at least a tick after the touch end.
+      await waitForCompositorCommit();
+
+      // We should not trigger a scrollend event for a scroll that did not
+      // change the scroll position.
+      assert_equals(horizontal_scrollend_arrived, false,
+                    "overscrollXDiv should not receive scrollend");
+      assert_equals(vertical_scrollend_arrived, false,
+                    "overscrollYDiv should not receive scrollend");
+    }, "Tests that the scroll is not propagated beyond div with non-auto " +
+       "overscroll-behavior.");
+  }
 </script>
diff --git a/tests/wpt/web-platform-tests/fledge/tentative/join-leave-ad-interest-group.https.sub.window.js b/tests/wpt/web-platform-tests/fledge/tentative/join-leave-ad-interest-group.https.sub.window.js
index 32924a8d872..973c586ca4f 100644
--- a/tests/wpt/web-platform-tests/fledge/tentative/join-leave-ad-interest-group.https.sub.window.js
+++ b/tests/wpt/web-platform-tests/fledge/tentative/join-leave-ad-interest-group.https.sub.window.js
@@ -462,21 +462,21 @@ const SIMPLE_JOIN_LEAVE_TEST_CASES = [
                      all: [3,4,5] }
   },
 
-  // Interest group dictionaries must be less than 50 KiB (51200 bytes), so test
-  // that here by using a large name on an otherwise valid interest group
+  // Interest group dictionaries must be less than 1 MB (1048576 bytes), so
+  // test that here by using a large name on an otherwise valid interest group
   // dictionary. The first case is the largest name value that still results in
   // a valid dictionary, whereas the second test case produces a dictionary
   // that's one byte too large.
   { expectJoinSucces: true,
     expectLeaveSucces: true,
     interestGroup: { ...BASE_INTEREST_GROUP,
-                     name: 'a'.repeat(51152) },
+                     name: 'a'.repeat(1048528) },
     testCaseName: "Largest possible interest group dictionary",
   },
   { expectJoinSucces: false,
     expectLeaveSucces: true,
     interestGroup: { ...BASE_INTEREST_GROUP,
-                     name: 'a'.repeat(51153) },
+                     name: 'a'.repeat(1048529) },
     testCaseName: "Oversized interest group dictionary",
   },
 ];
diff --git a/tests/wpt/web-platform-tests/fs/script-tests/FileSystemBaseHandle-IndexedDB.js b/tests/wpt/web-platform-tests/fs/script-tests/FileSystemBaseHandle-IndexedDB.js
index 15a0c2a3b57..9e114619bf2 100644
--- a/tests/wpt/web-platform-tests/fs/script-tests/FileSystemBaseHandle-IndexedDB.js
+++ b/tests/wpt/web-platform-tests/fs/script-tests/FileSystemBaseHandle-IndexedDB.js
@@ -119,3 +119,27 @@ directory_test(async (t, root_dir) => {
     assert_equals(result.value.length, value.length);
     await assert_equals_cloned_handles(result.value, value);
 }, 'Store handle in IndexedDB using inline keys.');
+
+directory_test(async (t, root_dir) => {
+  const expected_root_name = '';
+  assert_equals(root_dir.name, expected_root_name);
+
+  const db = await createDatabase(t, db => {
+    const store = db.createObjectStore('store', {keyPath: 'key'});
+  });
+
+  const value = [ root_dir ];
+  let tx = db.transaction('store', 'readwrite');
+  let store = tx.objectStore('store');
+  await promiseForRequest(t, store.put({key: 'key', value}));
+  await promiseForTransaction(t, tx);
+
+  tx = db.transaction('store', 'readonly');
+  store = tx.objectStore('store');
+  const result = await promiseForRequest(t, store.get('key'));
+  await promiseForTransaction(t, tx);
+
+  const actual = result.value[ 0 ];
+  assert_equals(actual.name, expected_root_name);
+  assert_true(await root_dir.isSameEntry(actual));
+}, 'Store and retrieve the root directory from IndexedDB.');
diff --git a/tests/wpt/web-platform-tests/fullscreen/api/element-request-fullscreen-screen-size.https.html b/tests/wpt/web-platform-tests/fullscreen/api/element-request-fullscreen-screen-size.https.html
new file mode 100644
index 00000000000..1c2bc9e3d11
--- /dev/null
+++ b/tests/wpt/web-platform-tests/fullscreen/api/element-request-fullscreen-screen-size.https.html
@@ -0,0 +1,63 @@
+<!DOCTYPE html>
+<title>
+    Element#requestFullscreen() does not affect Screen sizes
+</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script src="../trusted-click.js"></script>
+<body></body>
+<script>
+    promise_test(async (t) => {
+        const screenWidth = window.screen.width;
+        const screenHeight = window.screen.height;
+
+        if ('onchange' in window.screen) {
+            window.screen.onchange = () => {
+                assert_equals(window.screen.width, screenWidth);
+                assert_equals(window.screen.height, screenHeight);
+            }
+            t.add_cleanup(() => { window.screen.onchange = null; });
+        }
+
+        // Await a test_driver or manual click, fullscreen promise, and change.
+        await Promise.all([trusted_request(), fullScreenChange()]);
+        t.add_cleanup(() => { document.exitFullscreen(); });
+        assert_not_equals(document.fullscreenElement, null);
+
+        // Ensure the screen size is unchanged during fullscreen.
+        assert_equals(window.screen.width, screenWidth);
+        assert_equals(window.screen.height, screenHeight);
+    }, "Screen size is unchanged during element fullscreen");
+
+    promise_test(async (t) => {
+        const screenWidth = window.screen.width;
+        const screenHeight = window.screen.height;
+
+        if ('onchange' in window.screen) {
+            window.screen.onchange = () => {
+                assert_equals(window.screen.width, screenWidth);
+                assert_equals(window.screen.height, screenHeight);
+            }
+            t.add_cleanup(() => { window.screen.onchange = null; });
+        }
+
+        // Await a test_driver or manual click to start tab content capture.
+        await trusted_click();
+        const stream = await navigator.mediaDevices.getDisplayMedia(
+            {video:{displaySurface:"browser"}, selfBrowserSurface:"include"});
+        const capabilities = stream.getVideoTracks()[0].getCapabilities();
+        assert_equals(capabilities.displaySurface, "browser");
+        t.add_cleanup(() => { stream.getTracks().forEach(t => t.stop()) });
+
+        // Await a test_driver or manual click, fullscreen promise, and change.
+        await Promise.all([trusted_request(), fullScreenChange()]);
+        t.add_cleanup(() => { document.exitFullscreen(); });
+        assert_not_equals(document.fullscreenElement, null);
+
+        // Ensure the screen size is unchanged during tab-capture fullscreen.
+        assert_equals(window.screen.width, screenWidth);
+        assert_equals(window.screen.height, screenHeight);
+    }, "Screen size is unchanged during tab-capture element fullscreen");
+</script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html
index d64b81026ad..77818444c87 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html
@@ -19,12 +19,12 @@
 var t = async_test("Test exceptions on CanvasFilter() blur.object");
 _addTest(function(canvas, ctx) {
 
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur"}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: undefined}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: "foo"}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: [1,2]}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: NaN}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: {}}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur'}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: undefined}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 'foo'}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: [1,2]}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: NaN}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: {}}); });
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html
index 678a722520a..a56840e6073 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html
@@ -19,44 +19,44 @@
 var t = async_test("Test the functionality of ColorMatrix filters in CanvasFilter objects");
 _addTest(function(canvas, ctx) {
 
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: undefined}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: "foo"}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: null}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, "a"]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
-ctx.fillStyle = "#f00";
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 0});
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: undefined}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: 'foo'}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 'a']}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
+ctx.fillStyle = '#f00';
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 0});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 255,0,0,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 90});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 90});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,91,0,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 180});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 180});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,109,109,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 270});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 270});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 109,18,255,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "saturate", values: 0.5});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'saturate', values: 0.5});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 155,27,27,255, 2);
 ctx.clearRect(0, 0, 100, 50);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "luminanceToAlpha"});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'luminanceToAlpha'});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,0,0,54, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", values: [
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', values: [
         0, 0, 0, 0, 0,
         1, 1, 1, 1, 0,
         0, 0, 0, 0, 0,
         0, 0, 0, 1, 0
 ]});
 ctx.fillRect(0, 0, 50, 25);
-ctx.fillStyle = "#0f0";
+ctx.fillStyle = '#0f0';
 ctx.fillRect(50, 0, 50, 25);
-ctx.fillStyle = "#00f";
+ctx.fillStyle = '#00f';
 ctx.fillRect(0, 25, 50, 25);
-ctx.fillStyle = "#fff";
+ctx.fillStyle = '#fff';
 ctx.fillRect(50, 25, 50, 25);
 _assertPixelApprox(canvas, 10,10, 0,255,0,255, 2);
 _assertPixelApprox(canvas, 60,10, 0,255,0,255, 2);
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html
index 0ecd132c8ef..c54299ff2a5 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html
@@ -40,10 +40,10 @@ function getColor(inputColor, tableValues) {
 tableValuesR = [0, 0, 1, 1];
 tableValuesG = [2, 0, 0.5, 3];
 tableValuesB = [1, -1, 5, 0];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "discrete", tableValues: tableValuesR},
-    funcG: {type: "discrete", tableValues: tableValuesG},
-    funcB: {type: "discrete", tableValues: tableValuesB},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'discrete', tableValues: tableValuesR},
+    funcG: {type: 'discrete', tableValues: tableValuesG},
+    funcB: {type: 'discrete', tableValues: tableValuesB},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
index 4ef30c9249b..110cd2396ea 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
@@ -31,10 +31,10 @@ function getColor(inputColor, amplitude, exponent, offset) {
 const amplitudes = [2, 1.1, 0.5];
 const exponents = [5, 3, 1];
 const offsets = [0.25, 0, 0.5];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "gamma", amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
-    funcG: {type: "gamma", amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
-    funcB: {type: "gamma", amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'gamma', amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
+    funcG: {type: 'gamma', amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
+    funcB: {type: 'gamma', amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html
index 25eda36d96b..96a3e4936ee 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html
@@ -19,10 +19,10 @@
 var t = async_test("Test pixels on CanvasFilter() componentTransfer with identity type");
 _addTest(function(canvas, ctx) {
 
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "identity"},
-    funcG: {type: "identity"},
-    funcB: {type: "identity"},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'identity'},
+    funcG: {type: 'identity'},
+    funcB: {type: 'identity'},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
index c45f5586009..10f9931cc64 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
@@ -30,10 +30,10 @@ function getColor(inputColor, slopes, intercepts) {
 
 const slopes = [0.5, 1.2, -0.2];
 const intercepts = [0.25, 0, 0.5];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "linear", slope: slopes[0], intercept: intercepts[0]},
-    funcG: {type: "linear", slope: slopes[1], intercept: intercepts[1]},
-    funcB: {type: "linear", slope: slopes[2], intercept: intercepts[2]},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'linear', slope: slopes[0], intercept: intercepts[0]},
+    funcG: {type: 'linear', slope: slopes[1], intercept: intercepts[1]},
+    funcB: {type: 'linear', slope: slopes[2], intercept: intercepts[2]},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html
index b561cb6fd3f..7e743bf34f0 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html
@@ -40,10 +40,10 @@ function getColor(inputColor, tableValues) {
 tableValuesR = [0, 0, 1, 1];
 tableValuesG = [2, 0, 0.5, 3];
 tableValuesB = [1, -1, 5, 0];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "table", tableValues: tableValuesR},
-    funcG: {type: "table", tableValues: tableValuesG},
-    funcB: {type: "table", tableValues: tableValuesB},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'table', tableValues: tableValuesR},
+    funcG: {type: 'table', tableValues: tableValuesG},
+    funcB: {type: 'table', tableValues: tableValuesB},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html
index b85b742b3eb..b994a91842c 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html
@@ -19,23 +19,23 @@
 var t = async_test("Test exceptions on CanvasFilter() convolveMatrix");
 _addTest(function(canvas, ctx) {
 
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix"}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", divisor: 2}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: null}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: 1}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, "a"], [0]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], 0]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0, Infinity]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: []}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [1]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [1, 2, 3, 4]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[], []]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 2], []]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[], [1, 2]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix'}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', divisor: 2}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: 1}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 'a'], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], 0]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], [0, Infinity]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: []}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [1]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [1, 2, 3, 4]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[], []]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 2], []]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[], [1, 2]]}); });
 // This should not throw an error
-ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[]]});
-ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1]]});
+ctx.filter = new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[]]});
+ctx.filter = new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1]]});
 
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.dropShadow.tentative-expected.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.dropShadow.tentative-expected.html
index 90f406fed9f..8327b5cad48 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.dropShadow.tentative-expected.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.dropShadow.tentative-expected.html
@@ -4,71 +4,33 @@
 <h1>2d.filter.canvasFilterObject.dropShadow.tentative</h1>
 <p class="desc">Test CanvasFilter() dropShadow object.</p>
 
-<style>
-  .background {
-    background-color: teal;
-    position: absolute;
-    left: 0px;
-    width: 620px;
-    height: 50px;
-  }
+<svg width=620 height=320 xmlns="http://www.w3.org/2000/svg">
+  <rect x=0 y=0 width=100% height=50 fill="teal" />
+  <rect x=0 y=100 width=100% height=50 fill="teal" />
+  <rect x=0 y=200 width=100% height=50 fill="teal" />
 
-  .testcase {
-    position: absolute;
-    background-color: crimson;
-    width: 80px;
-    height: 80px;
-  }
-</style>
+  <rect x=10 y=10 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(2px 2px 2px black)"/>
+  <rect x=110 y=10 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(15px 10px 5px rgba(128, 0, 128, 0.7))"/>
 
-<div style="position: relative">
-  <div class='background' style="top: 0px;"></div>
-  <div class='background' style="top: 100px;"></div>
-  <div class='background' style="top: 200px;"></div>
+  <rect x=10 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(10px 10px 3px purple)"/>
+  <rect x=110 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(15px 10px 3px LinkText)"/>
+  <rect x=210 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(10px 15px 0px purple)"/>
+  <rect x=310 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(9px 12px 3px rgba(20, 50, 130, 1))"/>
+  <rect x=410 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.7))"/>
+  <rect x=510 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.49))"/>
 
-  <div class='testcase'
-       style="left: 10px; top: 10px;
-              filter: drop-shadow(2px 2px 2px black);">
-  </div>
-  <div class='testcase'
-       style="left: 110px; top: 10px;
-              filter: drop-shadow(15px 10px 5px rgba(128, 0, 128, 0.7));">
-  </div>
-  <div class='testcase'
-       style="left: 10px; top: 110px;
-              filter: drop-shadow(10px 10px 3px purple)">
-  </div>
-  <div class='testcase'
-       style="left: 110px; top: 110px;
-              filter: drop-shadow(15px 10px 3px LinkText)">
-  </div>
-  <div class='testcase'
-       style="left: 210px; top: 110px;
-              filter: drop-shadow(10px 15px 0px purple)">
-  </div>
-  <div class='testcase'
-       style="left: 310px; top: 110px;
-              filter: drop-shadow(9px 12px 3px rgba(20, 50, 130, 1))">
-  </div>
-  <div class='testcase'
-       style="left: 410px; top: 110px;
-              filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.7))">
-  </div>
-  <div class='testcase'
-       style="left: 510px; top: 110px;
-              filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.49))">
-  </div>
-
-  <div class='testcase'
-       style="left: 10px; top: 210px;
-              filter: drop-shadow(-5px 0px 0px purple);">
-  </div>
-  <div class='testcase'
-       style="left: 110px; top: 210px;
-              filter: drop-shadow(0px 5px 0px rgba(128, 0, 128, 0.8));">
-  </div>
-  <div class='testcase'
-       style="left: 210px; top: 210px;
-              filter: drop-shadow(1px 10px 0px rgba(128, 0, 128, 0.4));">
-  </div>
-</div>
+  <rect x=10 y=210 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(-5px 0px 0px purple)"/>
+  <rect x=110 y=210 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(0px 5px 0px rgba(128, 0, 128, 0.8))"/>
+  <rect x=210 y=210 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(1px 10px 0px rgba(128, 0, 128, 0.4))"/>
+</svg>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html
index 22c6a6547f2..712716d9f01 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html
@@ -19,64 +19,64 @@
   ctx.fillStyle = 'crimson';
 
   // Parameter defaults.
-  ctx.filter = new CanvasFilter({filter: "dropShadow"});
+  ctx.filter = new CanvasFilter({filter: 'dropShadow'});
   ctx.fillRect(10, 10, 80, 80);
 
   // All parameters specified.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 5,
-     floodColor: "purple", floodOpacity: 0.7});
+    {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 5,
+     floodColor: 'purple', floodOpacity: 0.7});
   ctx.fillRect(110, 10, 80, 80);
 
   // Named color.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 10, dy: 10, stdDeviation: 3,
-     floodColor: "purple"});
+    {filter: 'dropShadow', dx: 10, dy: 10, stdDeviation: 3,
+     floodColor: 'purple'});
   ctx.fillRect(10, 110, 80, 80);
 
   // System color.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-     floodColor: "LinkText"});
+    {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+     floodColor: 'LinkText'});
   ctx.fillRect(110, 110, 80, 80);
 
   // No blur.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 10, dy: 15, stdDeviation: 0,
-     floodColor: "purple"});
+    {filter: 'dropShadow', dx: 10, dy: 15, stdDeviation: 0,
+     floodColor: 'purple'});
   ctx.fillRect(210, 110, 80, 80);
 
   // Numerical color.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 9, dy: 12, stdDeviation: 3,
-     floodColor: "rgba(20, 50, 130, 1)"});
+    {filter: 'dropShadow', dx: 9, dy: 12, stdDeviation: 3,
+     floodColor: 'rgba(20, 50, 130, 1)'});
   ctx.fillRect(310, 110, 80, 80);
 
   // Transparent floodColor.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-     floodColor: "rgba(20, 50, 130, 0.7)"});
+    {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+     floodColor: 'rgba(20, 50, 130, 0.7)'});
   ctx.fillRect(410, 110, 80, 80);
 
   // Transparent floodColor and floodOpacity.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-     floodColor: "rgba(20, 50, 130, 0.7)", floodOpacity: 0.7});
+    {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+     floodColor: 'rgba(20, 50, 130, 0.7)', floodOpacity: 0.7});
   ctx.fillRect(510, 110, 80, 80);
 
   // Degenerate parameter values.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: [-5], dy: [], stdDeviation: null,
-     floodColor: "purple", floodOpacity: [2]});
+    {filter: 'dropShadow', dx: [-5], dy: [], stdDeviation: null,
+     floodColor: 'purple', floodOpacity: [2]});
   ctx.fillRect(10, 210, 80, 80);
 
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: null, dy: '5', stdDeviation: -5,
-     floodColor: "purple", floodOpacity: '0.8'});
+    {filter: 'dropShadow', dx: null, dy: '5', stdDeviation: -5,
+     floodColor: 'purple', floodOpacity: '0.8'});
   ctx.fillRect(110, 210, 80, 80);
 
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: true, dy: ['10'], stdDeviation: false,
-     floodColor: "purple", floodOpacity: ['0.4']});
+    {filter: 'dropShadow', dx: true, dy: ['10'], stdDeviation: false,
+     floodColor: 'purple', floodOpacity: ['0.4']});
   ctx.fillRect(210, 210, 80, 80);
 </script>
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.tentative.html
index 3a32eb6a55a..a4625db0197 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.tentative.html
@@ -22,11 +22,11 @@ _addTest(function(canvas, ctx) {
 _assert(ctx.filter == 'none', "ctx.filter == 'none'");
 ctx.filter = 'blur(5px)';
 _assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
-ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 ctx.filter = new CanvasFilter([
-    {filter: "gaussianBlur", stdDeviation: 5},
-    {filter: "gaussianBlur", stdDeviation: 10}
+    {filter: 'gaussianBlur', stdDeviation: 5},
+    {filter: 'gaussianBlur', stdDeviation: 10}
 ]);
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 var canvas2 = document.createElement('canvas');
@@ -37,8 +37,8 @@ ctx.filter = 'blur(5px)';
 _assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
 ctx.filter = 'none';
 _assert(ctx.filter == 'none', "ctx.filter == 'none'");
-ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
-ctx.filter = "this string is not a filter and should do nothing";
+ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
+ctx.filter = 'this string is not a filter and should do nothing';
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html
index 1f9d978ac8c..64f909a7fdb 100644
--- a/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/element/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html
@@ -27,7 +27,7 @@ const errorTestCases = [
   {baseFrequency: Infinity},
   {baseFrequency: undefined},
   {baseFrequency: -Infinity},
-  {baseFrequency: "test"},
+  {baseFrequency: 'test'},
 
   {numOctaves: {}},
   {numOctaves: -1},
@@ -36,7 +36,7 @@ const errorTestCases = [
   {numOctaves: undefined},
   {numOctaves: -Infinity},
   {numOctaves: [1, 1]},
-  {numOctaves: "test"},
+  {numOctaves: 'test'},
 
   {seed: {}},
   {seed: NaN},
@@ -44,7 +44,7 @@ const errorTestCases = [
   {seed: undefined},
   {seed: -Infinity},
   {seed: [1, 1]},
-  {seed: "test"},
+  {seed: 'test'},
 
   {stitchTiles: {}},
   {stitchTiles: NaN},
@@ -52,14 +52,14 @@ const errorTestCases = [
   {stitchTiles: undefined},
   {stitchTiles: -Infinity},
   {stitchTiles: [1, 1]},
-  {stitchTiles: "test"},
+  {stitchTiles: 'test'},
   {stitchTiles: null},
   {stitchTiles: []},
   {stitchTiles: [10]},
   {stitchTiles: 30},
   {stitchTiles: false},
   {stitchTiles: true},
-  {stitchTiles: "10"},
+  {stitchTiles: '10'},
   {stitchTiles: -1},
 
   {type: {}},
@@ -68,14 +68,14 @@ const errorTestCases = [
   {type: undefined},
   {type: -Infinity},
   {type: [1, 1]},
-  {type: "test"},
+  {type: 'test'},
   {type: null},
   {type: []},
   {type: [10]},
   {type: 30},
   {type: false},
   {type: true},
-  {type: "10"},
+  {type: '10'},
   {type: -1},
 ]
 
@@ -88,7 +88,7 @@ const workingTestCases = [
   {baseFrequency: 30},
   {baseFrequency: false},
   {baseFrequency: true},
-  {baseFrequency: "10"},
+  {baseFrequency: '10'},
 
   {numOctaves: null},
   {numOctaves: []},
@@ -96,7 +96,7 @@ const workingTestCases = [
   {numOctaves: 30},
   {numOctaves: false},
   {numOctaves: true},
-  {numOctaves: "10"},
+  {numOctaves: '10'},
 
   {seed: null},
   {seed: []},
@@ -104,23 +104,23 @@ const workingTestCases = [
   {seed: 30},
   {seed: false},
   {seed: true},
-  {seed: "10"},
+  {seed: '10'},
   {seed: -1},
 
-  {stitchTiles: "stitch"},
-  {stitchTiles: "noStitch"},
+  {stitchTiles: 'stitch'},
+  {stitchTiles: 'noStitch'},
 
-  {type: "fractalNoise"},
-  {type: "turbulence"},
+  {type: 'fractalNoise'},
+  {type: 'turbulence'},
 ]
 
 for (testCase of errorTestCases) {
-  const filterOptions = {...{filter: "turbulence"}, ...testCase};
+  const filterOptions = {...{filter: 'turbulence'}, ...testCase};
   assert_throws_js(TypeError, function() { new CanvasFilter(filterOptions); });
 }
 
 for (testCase of workingTestCases) {
-  const filterOptions = {...{filter: "turbulence"}, ...testCase};
+  const filterOptions = {...{filter: 'turbulence'}, ...testCase};
   _assert(new CanvasFilter(filterOptions) != null, "new CanvasFilter(filterOptions) != null");
 }
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html
index 6ce6fb633f8..f5332780c82 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.html
@@ -21,12 +21,12 @@ var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
 await (function(canvas, ctx) {
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur"}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: undefined}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: "foo"}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: [1,2]}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: NaN}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: {}}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur'}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: undefined}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 'foo'}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: [1,2]}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: NaN}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: {}}); });
 })(canvas, ctx);
 t.done();
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.worker.js
index a44868f585c..61f10308801 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.blur.exceptions.tentative.worker.js
@@ -16,12 +16,12 @@ t.step(function() {
 var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur"}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: undefined}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: "foo"}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: [1,2]}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: NaN}); });
-assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: {}}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur'}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: undefined}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 'foo'}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: [1,2]}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: NaN}); });
+assert_throws_js(TypeError, function() { ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: {}}); });
 t.done();
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html
index 3eda41776c0..f3dd3037bb7 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.html
@@ -21,44 +21,44 @@ var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
 await (function(canvas, ctx) {
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: undefined}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: "foo"}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: null}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, "a"]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
-ctx.fillStyle = "#f00";
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 0});
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: undefined}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: 'foo'}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 'a']}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
+ctx.fillStyle = '#f00';
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 0});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 255,0,0,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 90});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 90});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,91,0,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 180});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 180});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,109,109,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 270});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 270});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 109,18,255,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "saturate", values: 0.5});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'saturate', values: 0.5});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 155,27,27,255, 2);
 ctx.clearRect(0, 0, 100, 50);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "luminanceToAlpha"});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'luminanceToAlpha'});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,0,0,54, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", values: [
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', values: [
         0, 0, 0, 0, 0,
         1, 1, 1, 1, 0,
         0, 0, 0, 0, 0,
         0, 0, 0, 1, 0
 ]});
 ctx.fillRect(0, 0, 50, 25);
-ctx.fillStyle = "#0f0";
+ctx.fillStyle = '#0f0';
 ctx.fillRect(50, 0, 50, 25);
-ctx.fillStyle = "#00f";
+ctx.fillStyle = '#00f';
 ctx.fillRect(0, 25, 50, 25);
-ctx.fillStyle = "#fff";
+ctx.fillStyle = '#fff';
 ctx.fillRect(50, 25, 50, 25);
 _assertPixelApprox(canvas, 10,10, 0,255,0,255, 2);
 _assertPixelApprox(canvas, 60,10, 0,255,0,255, 2);
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.worker.js
index 105f312b9ce..19d57b61e53 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.colorMatrix.tentative.worker.js
@@ -16,44 +16,44 @@ t.step(function() {
 var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: undefined}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: "foo"}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: null}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, "a"]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
-ctx.fillStyle = "#f00";
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 0});
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: undefined}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: 'foo'}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 'a']}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]}); });
+ctx.fillStyle = '#f00';
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 0});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 255,0,0,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 90});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 90});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,91,0,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 180});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 180});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,109,109,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 270});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 270});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 109,18,255,255, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "saturate", values: 0.5});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'saturate', values: 0.5});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 155,27,27,255, 2);
 ctx.clearRect(0, 0, 100, 50);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "luminanceToAlpha"});
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'luminanceToAlpha'});
 ctx.fillRect(0, 0, 100, 50);
 _assertPixelApprox(canvas, 10,10, 0,0,0,54, 2);
-ctx.filter = new CanvasFilter({filter: "colorMatrix", values: [
+ctx.filter = new CanvasFilter({filter: 'colorMatrix', values: [
         0, 0, 0, 0, 0,
         1, 1, 1, 1, 0,
         0, 0, 0, 0, 0,
         0, 0, 0, 1, 0
 ]});
 ctx.fillRect(0, 0, 50, 25);
-ctx.fillStyle = "#0f0";
+ctx.fillStyle = '#0f0';
 ctx.fillRect(50, 0, 50, 25);
-ctx.fillStyle = "#00f";
+ctx.fillStyle = '#00f';
 ctx.fillRect(0, 25, 50, 25);
-ctx.fillStyle = "#fff";
+ctx.fillStyle = '#fff';
 ctx.fillRect(50, 25, 50, 25);
 _assertPixelApprox(canvas, 10,10, 0,255,0,255, 2);
 _assertPixelApprox(canvas, 60,10, 0,255,0,255, 2);
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html
index 7cb8b0dd143..dd6fc9ee5ff 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.html
@@ -42,10 +42,10 @@ function getColor(inputColor, tableValues) {
 tableValuesR = [0, 0, 1, 1];
 tableValuesG = [2, 0, 0.5, 3];
 tableValuesB = [1, -1, 5, 0];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "discrete", tableValues: tableValuesR},
-    funcG: {type: "discrete", tableValues: tableValuesG},
-    funcB: {type: "discrete", tableValues: tableValuesB},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'discrete', tableValues: tableValuesR},
+    funcG: {type: 'discrete', tableValues: tableValuesG},
+    funcB: {type: 'discrete', tableValues: tableValuesB},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.worker.js
index f1274f14253..79a5cd2475c 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.discrete.tentative.worker.js
@@ -37,10 +37,10 @@ function getColor(inputColor, tableValues) {
 tableValuesR = [0, 0, 1, 1];
 tableValuesG = [2, 0, 0.5, 3];
 tableValuesB = [1, -1, 5, 0];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "discrete", tableValues: tableValuesR},
-    funcG: {type: "discrete", tableValues: tableValuesG},
-    funcB: {type: "discrete", tableValues: tableValuesB},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'discrete', tableValues: tableValuesR},
+    funcG: {type: 'discrete', tableValues: tableValuesG},
+    funcB: {type: 'discrete', tableValues: tableValuesB},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
index 388fdca6f9d..f2a9fcfd49a 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.html
@@ -33,10 +33,10 @@ function getColor(inputColor, amplitude, exponent, offset) {
 const amplitudes = [2, 1.1, 0.5];
 const exponents = [5, 3, 1];
 const offsets = [0.25, 0, 0.5];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "gamma", amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
-    funcG: {type: "gamma", amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
-    funcB: {type: "gamma", amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'gamma', amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
+    funcG: {type: 'gamma', amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
+    funcB: {type: 'gamma', amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.worker.js
index 14bf50f89dd..a36fa19a5ef 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.gamma.tentative.worker.js
@@ -28,10 +28,10 @@ function getColor(inputColor, amplitude, exponent, offset) {
 const amplitudes = [2, 1.1, 0.5];
 const exponents = [5, 3, 1];
 const offsets = [0.25, 0, 0.5];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "gamma", amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
-    funcG: {type: "gamma", amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
-    funcB: {type: "gamma", amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'gamma', amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
+    funcG: {type: 'gamma', amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
+    funcB: {type: 'gamma', amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html
index 44eb7184956..33aae01eb05 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.html
@@ -21,10 +21,10 @@ var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
 await (function(canvas, ctx) {
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "identity"},
-    funcG: {type: "identity"},
-    funcB: {type: "identity"},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'identity'},
+    funcG: {type: 'identity'},
+    funcB: {type: 'identity'},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.worker.js
index ae749673f43..7236c7087a1 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.identity.tentative.worker.js
@@ -16,10 +16,10 @@ t.step(function() {
 var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "identity"},
-    funcG: {type: "identity"},
-    funcB: {type: "identity"},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'identity'},
+    funcG: {type: 'identity'},
+    funcB: {type: 'identity'},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
index d24a9e8608d..23731a1286c 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.html
@@ -32,10 +32,10 @@ function getColor(inputColor, slopes, intercepts) {
 
 const slopes = [0.5, 1.2, -0.2];
 const intercepts = [0.25, 0, 0.5];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "linear", slope: slopes[0], intercept: intercepts[0]},
-    funcG: {type: "linear", slope: slopes[1], intercept: intercepts[1]},
-    funcB: {type: "linear", slope: slopes[2], intercept: intercepts[2]},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'linear', slope: slopes[0], intercept: intercepts[0]},
+    funcG: {type: 'linear', slope: slopes[1], intercept: intercepts[1]},
+    funcB: {type: 'linear', slope: slopes[2], intercept: intercepts[2]},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js
index 5117d4a1b3b..9a4499d4d6b 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.linear.tentative.worker.js
@@ -27,10 +27,10 @@ function getColor(inputColor, slopes, intercepts) {
 
 const slopes = [0.5, 1.2, -0.2];
 const intercepts = [0.25, 0, 0.5];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "linear", slope: slopes[0], intercept: intercepts[0]},
-    funcG: {type: "linear", slope: slopes[1], intercept: intercepts[1]},
-    funcB: {type: "linear", slope: slopes[2], intercept: intercepts[2]},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'linear', slope: slopes[0], intercept: intercepts[0]},
+    funcG: {type: 'linear', slope: slopes[1], intercept: intercepts[1]},
+    funcB: {type: 'linear', slope: slopes[2], intercept: intercepts[2]},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html
index a704557cc54..c11e6adb910 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.html
@@ -42,10 +42,10 @@ function getColor(inputColor, tableValues) {
 tableValuesR = [0, 0, 1, 1];
 tableValuesG = [2, 0, 0.5, 3];
 tableValuesB = [1, -1, 5, 0];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "table", tableValues: tableValuesR},
-    funcG: {type: "table", tableValues: tableValuesG},
-    funcB: {type: "table", tableValues: tableValuesB},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'table', tableValues: tableValuesR},
+    funcG: {type: 'table', tableValues: tableValuesG},
+    funcB: {type: 'table', tableValues: tableValuesB},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.worker.js
index e2463eb9e76..8ff791d3bb9 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.componentTransfer.table.tentative.worker.js
@@ -37,10 +37,10 @@ function getColor(inputColor, tableValues) {
 tableValuesR = [0, 0, 1, 1];
 tableValuesG = [2, 0, 0.5, 3];
 tableValuesB = [1, -1, 5, 0];
-ctx.filter = new CanvasFilter({filter: "componentTransfer",
-    funcR: {type: "table", tableValues: tableValuesR},
-    funcG: {type: "table", tableValues: tableValuesG},
-    funcB: {type: "table", tableValues: tableValuesB},
+ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+    funcR: {type: 'table', tableValues: tableValuesR},
+    funcG: {type: 'table', tableValues: tableValuesG},
+    funcB: {type: 'table', tableValues: tableValuesB},
 });
 
 const inputColors = [
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html
index 0a6bddc56d7..c4b6df8e0db 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.html
@@ -21,23 +21,23 @@ var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
 await (function(canvas, ctx) {
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix"}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", divisor: 2}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: null}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: 1}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, "a"], [0]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], 0]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0, Infinity]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: []}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [1]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [1, 2, 3, 4]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[], []]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 2], []]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[], [1, 2]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix'}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', divisor: 2}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: 1}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 'a'], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], 0]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], [0, Infinity]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: []}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [1]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [1, 2, 3, 4]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[], []]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 2], []]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[], [1, 2]]}); });
 // This should not throw an error
-ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[]]});
-ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1]]});
+ctx.filter = new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[]]});
+ctx.filter = new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1]]});
 })(canvas, ctx);
 t.done();
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.worker.js
index bce4c0be158..f7e616e7a63 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative.worker.js
@@ -16,23 +16,23 @@ t.step(function() {
 var canvas = new OffscreenCanvas(100, 50);
 var ctx = canvas.getContext('2d');
 
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix"}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", divisor: 2}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: null}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: 1}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, "a"], [0]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], 0]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0, Infinity]]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: []}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [1]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [1, 2, 3, 4]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[], []]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 2], []]}); });
-assert_throws_js(TypeError, function() { new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[], [1, 2]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix'}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', divisor: 2}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: null}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: 1}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 'a'], [0]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], 0]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], [0, Infinity]]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: []}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [1]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [1, 2, 3, 4]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[], []]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 2], []]}); });
+assert_throws_js(TypeError, function() { new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[], [1, 2]]}); });
 // This should not throw an error
-ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[]]});
-ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1]]});
+ctx.filter = new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[]]});
+ctx.filter = new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1]]});
 t.done();
 
 });
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative-expected.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative-expected.html
index 90f406fed9f..8327b5cad48 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative-expected.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative-expected.html
@@ -4,71 +4,33 @@
 <h1>2d.filter.canvasFilterObject.dropShadow.tentative</h1>
 <p class="desc">Test CanvasFilter() dropShadow object.</p>
 
-<style>
-  .background {
-    background-color: teal;
-    position: absolute;
-    left: 0px;
-    width: 620px;
-    height: 50px;
-  }
+<svg width=620 height=320 xmlns="http://www.w3.org/2000/svg">
+  <rect x=0 y=0 width=100% height=50 fill="teal" />
+  <rect x=0 y=100 width=100% height=50 fill="teal" />
+  <rect x=0 y=200 width=100% height=50 fill="teal" />
 
-  .testcase {
-    position: absolute;
-    background-color: crimson;
-    width: 80px;
-    height: 80px;
-  }
-</style>
+  <rect x=10 y=10 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(2px 2px 2px black)"/>
+  <rect x=110 y=10 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(15px 10px 5px rgba(128, 0, 128, 0.7))"/>
 
-<div style="position: relative">
-  <div class='background' style="top: 0px;"></div>
-  <div class='background' style="top: 100px;"></div>
-  <div class='background' style="top: 200px;"></div>
+  <rect x=10 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(10px 10px 3px purple)"/>
+  <rect x=110 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(15px 10px 3px LinkText)"/>
+  <rect x=210 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(10px 15px 0px purple)"/>
+  <rect x=310 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(9px 12px 3px rgba(20, 50, 130, 1))"/>
+  <rect x=410 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.7))"/>
+  <rect x=510 y=110 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.49))"/>
 
-  <div class='testcase'
-       style="left: 10px; top: 10px;
-              filter: drop-shadow(2px 2px 2px black);">
-  </div>
-  <div class='testcase'
-       style="left: 110px; top: 10px;
-              filter: drop-shadow(15px 10px 5px rgba(128, 0, 128, 0.7));">
-  </div>
-  <div class='testcase'
-       style="left: 10px; top: 110px;
-              filter: drop-shadow(10px 10px 3px purple)">
-  </div>
-  <div class='testcase'
-       style="left: 110px; top: 110px;
-              filter: drop-shadow(15px 10px 3px LinkText)">
-  </div>
-  <div class='testcase'
-       style="left: 210px; top: 110px;
-              filter: drop-shadow(10px 15px 0px purple)">
-  </div>
-  <div class='testcase'
-       style="left: 310px; top: 110px;
-              filter: drop-shadow(9px 12px 3px rgba(20, 50, 130, 1))">
-  </div>
-  <div class='testcase'
-       style="left: 410px; top: 110px;
-              filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.7))">
-  </div>
-  <div class='testcase'
-       style="left: 510px; top: 110px;
-              filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.49))">
-  </div>
-
-  <div class='testcase'
-       style="left: 10px; top: 210px;
-              filter: drop-shadow(-5px 0px 0px purple);">
-  </div>
-  <div class='testcase'
-       style="left: 110px; top: 210px;
-              filter: drop-shadow(0px 5px 0px rgba(128, 0, 128, 0.8));">
-  </div>
-  <div class='testcase'
-       style="left: 210px; top: 210px;
-              filter: drop-shadow(1px 10px 0px rgba(128, 0, 128, 0.4));">
-  </div>
-</div>
+  <rect x=10 y=210 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(-5px 0px 0px purple)"/>
+  <rect x=110 y=210 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(0px 5px 0px rgba(128, 0, 128, 0.8))"/>
+  <rect x=210 y=210 width=80 height=80 fill="crimson"
+        style="filter: drop-shadow(1px 10px 0px rgba(128, 0, 128, 0.4))"/>
+</svg>
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html
index 04cf86d204c..04326527905 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.html
@@ -19,65 +19,65 @@
   ctx.fillStyle = 'crimson';
 
   // Parameter defaults.
-  ctx.filter = new CanvasFilter({filter: "dropShadow"});
+  ctx.filter = new CanvasFilter({filter: 'dropShadow'});
   ctx.fillRect(10, 10, 80, 80);
 
   // All parameters specified.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 5,
-     floodColor: "purple", floodOpacity: 0.7});
+    {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 5,
+     floodColor: 'purple', floodOpacity: 0.7});
   ctx.fillRect(110, 10, 80, 80);
 
   // Named color.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 10, dy: 10, stdDeviation: 3,
-     floodColor: "purple"});
+    {filter: 'dropShadow', dx: 10, dy: 10, stdDeviation: 3,
+     floodColor: 'purple'});
   ctx.fillRect(10, 110, 80, 80);
 
   // System color.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-     floodColor: "LinkText"});
+    {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+     floodColor: 'LinkText'});
   ctx.fillRect(110, 110, 80, 80);
 
   // No blur.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 10, dy: 15, stdDeviation: 0,
-     floodColor: "purple"});
+    {filter: 'dropShadow', dx: 10, dy: 15, stdDeviation: 0,
+     floodColor: 'purple'});
   ctx.fillRect(210, 110, 80, 80);
 
   // Numerical color.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 9, dy: 12, stdDeviation: 3,
-     floodColor: "rgba(20, 50, 130, 1)"});
+    {filter: 'dropShadow', dx: 9, dy: 12, stdDeviation: 3,
+     floodColor: 'rgba(20, 50, 130, 1)'});
   ctx.fillRect(310, 110, 80, 80);
 
   // Transparent floodColor.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-     floodColor: "rgba(20, 50, 130, 0.7)"});
+    {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+     floodColor: 'rgba(20, 50, 130, 0.7)'});
   ctx.fillRect(410, 110, 80, 80);
 
   // Transparent floodColor and floodOpacity.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-     floodColor: "rgba(20, 50, 130, 0.7)", floodOpacity: 0.7});
+    {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+     floodColor: 'rgba(20, 50, 130, 0.7)', floodOpacity: 0.7});
   ctx.fillRect(510, 110, 80, 80);
 
   // Degenerate parameter values.
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: [-5], dy: [], stdDeviation: null,
-     floodColor: "purple", floodOpacity: [2]});
+    {filter: 'dropShadow', dx: [-5], dy: [], stdDeviation: null,
+     floodColor: 'purple', floodOpacity: [2]});
   ctx.fillRect(10, 210, 80, 80);
 
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: null, dy: '5', stdDeviation: -5,
-     floodColor: "purple", floodOpacity: '0.8'});
+    {filter: 'dropShadow', dx: null, dy: '5', stdDeviation: -5,
+     floodColor: 'purple', floodOpacity: '0.8'});
   ctx.fillRect(110, 210, 80, 80);
 
   ctx.filter = new CanvasFilter(
-    {filter: "dropShadow", dx: true, dy: ['10'], stdDeviation: false,
-     floodColor: "purple", floodOpacity: ['0.4']});
+    {filter: 'dropShadow', dx: true, dy: ['10'], stdDeviation: false,
+     floodColor: 'purple', floodOpacity: ['0.4']});
   ctx.fillRect(210, 210, 80, 80);
 
   const canvas = document.getElementById("canvas");
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.w.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.w.html
index 8d5e2da1586..de72f5fe3d9 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.w.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.dropShadow.tentative.w.html
@@ -21,65 +21,65 @@
     ctx.fillStyle = 'crimson';
 
     // Parameter defaults.
-    ctx.filter = new CanvasFilter({filter: "dropShadow"});
+    ctx.filter = new CanvasFilter({filter: 'dropShadow'});
     ctx.fillRect(10, 10, 80, 80);
 
     // All parameters specified.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 5,
-       floodColor: "purple", floodOpacity: 0.7});
+      {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 5,
+       floodColor: 'purple', floodOpacity: 0.7});
     ctx.fillRect(110, 10, 80, 80);
 
     // Named color.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 10, dy: 10, stdDeviation: 3,
-       floodColor: "purple"});
+      {filter: 'dropShadow', dx: 10, dy: 10, stdDeviation: 3,
+       floodColor: 'purple'});
     ctx.fillRect(10, 110, 80, 80);
 
     // System color.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-       floodColor: "LinkText"});
+      {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+       floodColor: 'LinkText'});
     ctx.fillRect(110, 110, 80, 80);
 
     // No blur.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 10, dy: 15, stdDeviation: 0,
-       floodColor: "purple"});
+      {filter: 'dropShadow', dx: 10, dy: 15, stdDeviation: 0,
+       floodColor: 'purple'});
     ctx.fillRect(210, 110, 80, 80);
 
     // Numerical color.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 9, dy: 12, stdDeviation: 3,
-       floodColor: "rgba(20, 50, 130, 1)"});
+      {filter: 'dropShadow', dx: 9, dy: 12, stdDeviation: 3,
+       floodColor: 'rgba(20, 50, 130, 1)'});
     ctx.fillRect(310, 110, 80, 80);
 
     // Transparent floodColor.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-       floodColor: "rgba(20, 50, 130, 0.7)"});
+      {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+       floodColor: 'rgba(20, 50, 130, 0.7)'});
     ctx.fillRect(410, 110, 80, 80);
 
     // Transparent floodColor and floodOpacity.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-       floodColor: "rgba(20, 50, 130, 0.7)", floodOpacity: 0.7});
+      {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+       floodColor: 'rgba(20, 50, 130, 0.7)', floodOpacity: 0.7});
     ctx.fillRect(510, 110, 80, 80);
 
     // Degenerate parameter values.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: [-5], dy: [], stdDeviation: null,
-       floodColor: "purple", floodOpacity: [2]});
+      {filter: 'dropShadow', dx: [-5], dy: [], stdDeviation: null,
+       floodColor: 'purple', floodOpacity: [2]});
     ctx.fillRect(10, 210, 80, 80);
 
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: null, dy: '5', stdDeviation: -5,
-       floodColor: "purple", floodOpacity: '0.8'});
+      {filter: 'dropShadow', dx: null, dy: '5', stdDeviation: -5,
+       floodColor: 'purple', floodOpacity: '0.8'});
     ctx.fillRect(110, 210, 80, 80);
 
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: true, dy: ['10'], stdDeviation: false,
-       floodColor: "purple", floodOpacity: ['0.4']});
+      {filter: 'dropShadow', dx: true, dy: ['10'], stdDeviation: false,
+       floodColor: 'purple', floodOpacity: ['0.4']});
     ctx.fillRect(210, 210, 80, 80);
 
     const bitmap = oc.transferToImageBitmap();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.html
index 75d369cad2f..4d80dddf007 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.html
@@ -24,11 +24,11 @@ await (function(canvas, ctx) {
 _assert(ctx.filter == 'none', "ctx.filter == 'none'");
 ctx.filter = 'blur(5px)';
 _assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
-ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 ctx.filter = new CanvasFilter([
-    {filter: "gaussianBlur", stdDeviation: 5},
-    {filter: "gaussianBlur", stdDeviation: 10}
+    {filter: 'gaussianBlur', stdDeviation: 5},
+    {filter: 'gaussianBlur', stdDeviation: 10}
 ]);
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 var canvas2 = new OffscreenCanvas(100, 50);
@@ -39,8 +39,8 @@ ctx.filter = 'blur(5px)';
 _assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
 ctx.filter = 'none';
 _assert(ctx.filter == 'none', "ctx.filter == 'none'");
-ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
-ctx.filter = "this string is not a filter and should do nothing";
+ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
+ctx.filter = 'this string is not a filter and should do nothing';
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 })(canvas, ctx);
 t.done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.worker.js
index 30772a39d10..48c4a0448d9 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.tentative.worker.js
@@ -19,11 +19,11 @@ var ctx = canvas.getContext('2d');
 _assert(ctx.filter == 'none', "ctx.filter == 'none'");
 ctx.filter = 'blur(5px)';
 _assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
-ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 ctx.filter = new CanvasFilter([
-    {filter: "gaussianBlur", stdDeviation: 5},
-    {filter: "gaussianBlur", stdDeviation: 10}
+    {filter: 'gaussianBlur', stdDeviation: 5},
+    {filter: 'gaussianBlur', stdDeviation: 10}
 ]);
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 var canvas2 = new OffscreenCanvas(100, 50);
@@ -34,8 +34,8 @@ ctx.filter = 'blur(5px)';
 _assert(ctx.filter == 'blur(5px)', "ctx.filter == 'blur(5px)'");
 ctx.filter = 'none';
 _assert(ctx.filter == 'none', "ctx.filter == 'none'");
-ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
-ctx.filter = "this string is not a filter and should do nothing";
+ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
+ctx.filter = 'this string is not a filter and should do nothing';
 _assert(ctx.filter.toString() == '[object CanvasFilter]', "ctx.filter.toString() == '[object CanvasFilter]'");
 t.done();
 
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html
index 610dca9feaf..2ed61e66d03 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.html
@@ -29,7 +29,7 @@ const errorTestCases = [
   {baseFrequency: Infinity},
   {baseFrequency: undefined},
   {baseFrequency: -Infinity},
-  {baseFrequency: "test"},
+  {baseFrequency: 'test'},
 
   {numOctaves: {}},
   {numOctaves: -1},
@@ -38,7 +38,7 @@ const errorTestCases = [
   {numOctaves: undefined},
   {numOctaves: -Infinity},
   {numOctaves: [1, 1]},
-  {numOctaves: "test"},
+  {numOctaves: 'test'},
 
   {seed: {}},
   {seed: NaN},
@@ -46,7 +46,7 @@ const errorTestCases = [
   {seed: undefined},
   {seed: -Infinity},
   {seed: [1, 1]},
-  {seed: "test"},
+  {seed: 'test'},
 
   {stitchTiles: {}},
   {stitchTiles: NaN},
@@ -54,14 +54,14 @@ const errorTestCases = [
   {stitchTiles: undefined},
   {stitchTiles: -Infinity},
   {stitchTiles: [1, 1]},
-  {stitchTiles: "test"},
+  {stitchTiles: 'test'},
   {stitchTiles: null},
   {stitchTiles: []},
   {stitchTiles: [10]},
   {stitchTiles: 30},
   {stitchTiles: false},
   {stitchTiles: true},
-  {stitchTiles: "10"},
+  {stitchTiles: '10'},
   {stitchTiles: -1},
 
   {type: {}},
@@ -70,14 +70,14 @@ const errorTestCases = [
   {type: undefined},
   {type: -Infinity},
   {type: [1, 1]},
-  {type: "test"},
+  {type: 'test'},
   {type: null},
   {type: []},
   {type: [10]},
   {type: 30},
   {type: false},
   {type: true},
-  {type: "10"},
+  {type: '10'},
   {type: -1},
 ]
 
@@ -90,7 +90,7 @@ const workingTestCases = [
   {baseFrequency: 30},
   {baseFrequency: false},
   {baseFrequency: true},
-  {baseFrequency: "10"},
+  {baseFrequency: '10'},
 
   {numOctaves: null},
   {numOctaves: []},
@@ -98,7 +98,7 @@ const workingTestCases = [
   {numOctaves: 30},
   {numOctaves: false},
   {numOctaves: true},
-  {numOctaves: "10"},
+  {numOctaves: '10'},
 
   {seed: null},
   {seed: []},
@@ -106,23 +106,23 @@ const workingTestCases = [
   {seed: 30},
   {seed: false},
   {seed: true},
-  {seed: "10"},
+  {seed: '10'},
   {seed: -1},
 
-  {stitchTiles: "stitch"},
-  {stitchTiles: "noStitch"},
+  {stitchTiles: 'stitch'},
+  {stitchTiles: 'noStitch'},
 
-  {type: "fractalNoise"},
-  {type: "turbulence"},
+  {type: 'fractalNoise'},
+  {type: 'turbulence'},
 ]
 
 for (testCase of errorTestCases) {
-  const filterOptions = {...{filter: "turbulence"}, ...testCase};
+  const filterOptions = {...{filter: 'turbulence'}, ...testCase};
   assert_throws_js(TypeError, function() { new CanvasFilter(filterOptions); });
 }
 
 for (testCase of workingTestCases) {
-  const filterOptions = {...{filter: "turbulence"}, ...testCase};
+  const filterOptions = {...{filter: 'turbulence'}, ...testCase};
   _assert(new CanvasFilter(filterOptions) != null, "new CanvasFilter(filterOptions) != null");
 }
 })(canvas, ctx);
diff --git a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.worker.js b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.worker.js
index 76673fab9a7..1bed65ad156 100644
--- a/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.worker.js
+++ b/tests/wpt/web-platform-tests/html/canvas/offscreen/filters/2d.filter.canvasFilterObject.turbulence.inputTypes.tentative.worker.js
@@ -24,7 +24,7 @@ const errorTestCases = [
   {baseFrequency: Infinity},
   {baseFrequency: undefined},
   {baseFrequency: -Infinity},
-  {baseFrequency: "test"},
+  {baseFrequency: 'test'},
 
   {numOctaves: {}},
   {numOctaves: -1},
@@ -33,7 +33,7 @@ const errorTestCases = [
   {numOctaves: undefined},
   {numOctaves: -Infinity},
   {numOctaves: [1, 1]},
-  {numOctaves: "test"},
+  {numOctaves: 'test'},
 
   {seed: {}},
   {seed: NaN},
@@ -41,7 +41,7 @@ const errorTestCases = [
   {seed: undefined},
   {seed: -Infinity},
   {seed: [1, 1]},
-  {seed: "test"},
+  {seed: 'test'},
 
   {stitchTiles: {}},
   {stitchTiles: NaN},
@@ -49,14 +49,14 @@ const errorTestCases = [
   {stitchTiles: undefined},
   {stitchTiles: -Infinity},
   {stitchTiles: [1, 1]},
-  {stitchTiles: "test"},
+  {stitchTiles: 'test'},
   {stitchTiles: null},
   {stitchTiles: []},
   {stitchTiles: [10]},
   {stitchTiles: 30},
   {stitchTiles: false},
   {stitchTiles: true},
-  {stitchTiles: "10"},
+  {stitchTiles: '10'},
   {stitchTiles: -1},
 
   {type: {}},
@@ -65,14 +65,14 @@ const errorTestCases = [
   {type: undefined},
   {type: -Infinity},
   {type: [1, 1]},
-  {type: "test"},
+  {type: 'test'},
   {type: null},
   {type: []},
   {type: [10]},
   {type: 30},
   {type: false},
   {type: true},
-  {type: "10"},
+  {type: '10'},
   {type: -1},
 ]
 
@@ -85,7 +85,7 @@ const workingTestCases = [
   {baseFrequency: 30},
   {baseFrequency: false},
   {baseFrequency: true},
-  {baseFrequency: "10"},
+  {baseFrequency: '10'},
 
   {numOctaves: null},
   {numOctaves: []},
@@ -93,7 +93,7 @@ const workingTestCases = [
   {numOctaves: 30},
   {numOctaves: false},
   {numOctaves: true},
-  {numOctaves: "10"},
+  {numOctaves: '10'},
 
   {seed: null},
   {seed: []},
@@ -101,23 +101,23 @@ const workingTestCases = [
   {seed: 30},
   {seed: false},
   {seed: true},
-  {seed: "10"},
+  {seed: '10'},
   {seed: -1},
 
-  {stitchTiles: "stitch"},
-  {stitchTiles: "noStitch"},
+  {stitchTiles: 'stitch'},
+  {stitchTiles: 'noStitch'},
 
-  {type: "fractalNoise"},
-  {type: "turbulence"},
+  {type: 'fractalNoise'},
+  {type: 'turbulence'},
 ]
 
 for (testCase of errorTestCases) {
-  const filterOptions = {...{filter: "turbulence"}, ...testCase};
+  const filterOptions = {...{filter: 'turbulence'}, ...testCase};
   assert_throws_js(TypeError, function() { new CanvasFilter(filterOptions); });
 }
 
 for (testCase of workingTestCases) {
-  const filterOptions = {...{filter: "turbulence"}, ...testCase};
+  const filterOptions = {...{filter: 'turbulence'}, ...testCase};
   _assert(new CanvasFilter(filterOptions) != null, "new CanvasFilter(filterOptions) != null");
 }
 t.done();
diff --git a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/filters.yaml b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/filters.yaml
index bdf3dcfe9fc..246b73e7f1a 100644
--- a/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/filters.yaml
+++ b/tests/wpt/web-platform-tests/html/canvas/tools/yaml-new/filters.yaml
@@ -40,11 +40,11 @@
     @assert ctx.filter == 'none';
     ctx.filter = 'blur(5px)';
     @assert ctx.filter == 'blur(5px)';
-    ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+    ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
     @assert ctx.filter.toString() == '[object CanvasFilter]';
     ctx.filter = new CanvasFilter([
-        {filter: "gaussianBlur", stdDeviation: 5},
-        {filter: "gaussianBlur", stdDeviation: 10}
+        {filter: 'gaussianBlur', stdDeviation: 5},
+        {filter: 'gaussianBlur', stdDeviation: 10}
     ]);
     @assert ctx.filter.toString() == '[object CanvasFilter]';
     var canvas2 = document.createElement('canvas');
@@ -55,8 +55,8 @@
     @assert ctx.filter == 'blur(5px)';
     ctx.filter = 'none';
     @assert ctx.filter == 'none';
-    ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
-    ctx.filter = "this string is not a filter and should do nothing";
+    ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
+    ctx.filter = 'this string is not a filter and should do nothing';
     @assert ctx.filter.toString() == '[object CanvasFilter]';
 
 - name: 2d.filter.canvasFilterObject.tentative
@@ -66,11 +66,11 @@
     @assert ctx.filter == 'none';
     ctx.filter = 'blur(5px)';
     @assert ctx.filter == 'blur(5px)';
-    ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
+    ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
     @assert ctx.filter.toString() == '[object CanvasFilter]';
     ctx.filter = new CanvasFilter([
-        {filter: "gaussianBlur", stdDeviation: 5},
-        {filter: "gaussianBlur", stdDeviation: 10}
+        {filter: 'gaussianBlur', stdDeviation: 5},
+        {filter: 'gaussianBlur', stdDeviation: 10}
     ]);
     @assert ctx.filter.toString() == '[object CanvasFilter]';
     var canvas2 = new OffscreenCanvas(100, 50);
@@ -81,61 +81,61 @@
     @assert ctx.filter == 'blur(5px)';
     ctx.filter = 'none';
     @assert ctx.filter == 'none';
-    ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: 5});
-    ctx.filter = "this string is not a filter and should do nothing";
+    ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 5});
+    ctx.filter = 'this string is not a filter and should do nothing';
     @assert ctx.filter.toString() == '[object CanvasFilter]';
 
 - name: 2d.filter.canvasFilterObject.blur.exceptions.tentative
   desc: Test exceptions on CanvasFilter() blur.object
   code: |
-    @assert throws TypeError ctx.filter = new CanvasFilter({filter: "gaussianBlur"});
-    @assert throws TypeError ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: undefined});
-    @assert throws TypeError ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: "foo"});
-    @assert throws TypeError ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: [1,2]});
-    @assert throws TypeError ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: NaN});
-    @assert throws TypeError ctx.filter = new CanvasFilter({filter: "gaussianBlur", stdDeviation: {}});
+    @assert throws TypeError ctx.filter = new CanvasFilter({filter: 'gaussianBlur'});
+    @assert throws TypeError ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: undefined});
+    @assert throws TypeError ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: 'foo'});
+    @assert throws TypeError ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: [1,2]});
+    @assert throws TypeError ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: NaN});
+    @assert throws TypeError ctx.filter = new CanvasFilter({filter: 'gaussianBlur', stdDeviation: {}});
 
 - name: 2d.filter.canvasFilterObject.colorMatrix.tentative
   desc: Test the functionality of ColorMatrix filters in CanvasFilter objects
   code: |
-    @assert throws TypeError new CanvasFilter({filter: "colorMatrix", values: undefined});
-    @assert throws TypeError new CanvasFilter({filter: "colorMatrix", values: "foo"});
-    @assert throws TypeError new CanvasFilter({filter: "colorMatrix", values: null});
-    @assert throws TypeError new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3]});
-    @assert throws TypeError new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, "a"]});
-    @assert throws TypeError new CanvasFilter({filter: "colorMatrix", values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]});
-    ctx.fillStyle = "#f00";
-    ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 0});
+    @assert throws TypeError new CanvasFilter({filter: 'colorMatrix', values: undefined});
+    @assert throws TypeError new CanvasFilter({filter: 'colorMatrix', values: 'foo'});
+    @assert throws TypeError new CanvasFilter({filter: 'colorMatrix', values: null});
+    @assert throws TypeError new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3]});
+    @assert throws TypeError new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 'a']});
+    @assert throws TypeError new CanvasFilter({filter: 'colorMatrix', values: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, Infinity]});
+    ctx.fillStyle = '#f00';
+    ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 0});
     ctx.fillRect(0, 0, 100, 50);
     @assert pixel 10,10 ==~ 255,0,0,255;
-    ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 90});
+    ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 90});
     ctx.fillRect(0, 0, 100, 50);
     @assert pixel 10,10 ==~ 0,91,0,255;
-    ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 180});
+    ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 180});
     ctx.fillRect(0, 0, 100, 50);
     @assert pixel 10,10 ==~ 0,109,109,255;
-    ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "hueRotate", values: 270});
+    ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'hueRotate', values: 270});
     ctx.fillRect(0, 0, 100, 50);
     @assert pixel 10,10 ==~ 109,18,255,255;
-    ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "saturate", values: 0.5});
+    ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'saturate', values: 0.5});
     ctx.fillRect(0, 0, 100, 50);
     @assert pixel 10,10 ==~ 155,27,27,255;
     ctx.clearRect(0, 0, 100, 50);
-    ctx.filter = new CanvasFilter({filter: "colorMatrix", type: "luminanceToAlpha"});
+    ctx.filter = new CanvasFilter({filter: 'colorMatrix', type: 'luminanceToAlpha'});
     ctx.fillRect(0, 0, 100, 50);
     @assert pixel 10,10 ==~ 0,0,0,54;
-    ctx.filter = new CanvasFilter({filter: "colorMatrix", values: [
+    ctx.filter = new CanvasFilter({filter: 'colorMatrix', values: [
             0, 0, 0, 0, 0,
             1, 1, 1, 1, 0,
             0, 0, 0, 0, 0,
             0, 0, 0, 1, 0
     ]});
     ctx.fillRect(0, 0, 50, 25);
-    ctx.fillStyle = "#0f0";
+    ctx.fillStyle = '#0f0';
     ctx.fillRect(50, 0, 50, 25);
-    ctx.fillStyle = "#00f";
+    ctx.fillStyle = '#00f';
     ctx.fillRect(0, 25, 50, 25);
-    ctx.fillStyle = "#fff";
+    ctx.fillStyle = '#fff';
     ctx.fillRect(50, 25, 50, 25);
     @assert pixel 10,10 ==~ 0,255,0,255;
     @assert pixel 60,10 ==~ 0,255,0,255;
@@ -145,23 +145,23 @@
 - name: 2d.filter.canvasFilterObject.convolveMatrix.exceptions.tentative
   desc: Test exceptions on CanvasFilter() convolveMatrix
   code: |
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix"});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", divisor: 2});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: null});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: 1});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0]]});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, "a"], [0]]});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], 0]});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 0], [0, Infinity]]});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: []});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [1]});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [1, 2, 3, 4]});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[], []]});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1, 2], []]});
-    @assert throws TypeError new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[], [1, 2]]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix'});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', divisor: 2});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: null});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: 1});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], [0]]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 'a'], [0]]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], 0]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 0], [0, Infinity]]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: []});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [1]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [1, 2, 3, 4]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[], []]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1, 2], []]});
+    @assert throws TypeError new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[], [1, 2]]});
     // This should not throw an error
-    ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[]]});
-    ctx.filter = new CanvasFilter({filter: "convolveMatrix", kernelMatrix: [[1]]});
+    ctx.filter = new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[]]});
+    ctx.filter = new CanvasFilter({filter: 'convolveMatrix', kernelMatrix: [[1]]});
 
 - name: 2d.filter.canvasFilterObject.componentTransfer.linear.tentative
   desc: Test pixels on CanvasFilter() componentTransfer with linear type
@@ -177,10 +177,10 @@
 
     const slopes = [0.5, 1.2, -0.2];
     const intercepts = [0.25, 0, 0.5];
-    ctx.filter = new CanvasFilter({filter: "componentTransfer",
-        funcR: {type: "linear", slope: slopes[0], intercept: intercepts[0]},
-        funcG: {type: "linear", slope: slopes[1], intercept: intercepts[1]},
-        funcB: {type: "linear", slope: slopes[2], intercept: intercepts[2]},
+    ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+        funcR: {type: 'linear', slope: slopes[0], intercept: intercepts[0]},
+        funcG: {type: 'linear', slope: slopes[1], intercept: intercepts[1]},
+        funcB: {type: 'linear', slope: slopes[2], intercept: intercepts[2]},
     });
 
     const inputColors = [
@@ -201,10 +201,10 @@
 - name: 2d.filter.canvasFilterObject.componentTransfer.identity.tentative
   desc: Test pixels on CanvasFilter() componentTransfer with identity type
   code: |
-    ctx.filter = new CanvasFilter({filter: "componentTransfer",
-        funcR: {type: "identity"},
-        funcG: {type: "identity"},
-        funcB: {type: "identity"},
+    ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+        funcR: {type: 'identity'},
+        funcG: {type: 'identity'},
+        funcB: {type: 'identity'},
     });
 
     const inputColors = [
@@ -236,10 +236,10 @@
     const amplitudes = [2, 1.1, 0.5];
     const exponents = [5, 3, 1];
     const offsets = [0.25, 0, 0.5];
-    ctx.filter = new CanvasFilter({filter: "componentTransfer",
-        funcR: {type: "gamma", amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
-        funcG: {type: "gamma", amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
-        funcB: {type: "gamma", amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
+    ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+        funcR: {type: 'gamma', amplitude: amplitudes[0], exponent: exponents[0], offset: offsets[0]},
+        funcG: {type: 'gamma', amplitude: amplitudes[1], exponent: exponents[1], offset: offsets[1]},
+        funcB: {type: 'gamma', amplitude: amplitudes[2], exponent: exponents[2], offset: offsets[2]},
     });
 
     const inputColors = [
@@ -281,10 +281,10 @@
     tableValuesR = [0, 0, 1, 1];
     tableValuesG = [2, 0, 0.5, 3];
     tableValuesB = [1, -1, 5, 0];
-    ctx.filter = new CanvasFilter({filter: "componentTransfer",
-        funcR: {type: "table", tableValues: tableValuesR},
-        funcG: {type: "table", tableValues: tableValuesG},
-        funcB: {type: "table", tableValues: tableValuesB},
+    ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+        funcR: {type: 'table', tableValues: tableValuesR},
+        funcG: {type: 'table', tableValues: tableValuesG},
+        funcB: {type: 'table', tableValues: tableValuesB},
     });
 
     const inputColors = [
@@ -326,10 +326,10 @@
     tableValuesR = [0, 0, 1, 1];
     tableValuesG = [2, 0, 0.5, 3];
     tableValuesB = [1, -1, 5, 0];
-    ctx.filter = new CanvasFilter({filter: "componentTransfer",
-        funcR: {type: "discrete", tableValues: tableValuesR},
-        funcG: {type: "discrete", tableValues: tableValuesG},
-        funcB: {type: "discrete", tableValues: tableValuesB},
+    ctx.filter = new CanvasFilter({filter: 'componentTransfer',
+        funcR: {type: 'discrete', tableValues: tableValuesR},
+        funcG: {type: 'discrete', tableValues: tableValuesG},
+        funcB: {type: 'discrete', tableValues: tableValuesB},
     });
 
     const inputColors = [
@@ -359,135 +359,97 @@
     ctx.fillStyle = 'crimson';
 
     // Parameter defaults.
-    ctx.filter = new CanvasFilter({filter: "dropShadow"});
+    ctx.filter = new CanvasFilter({filter: 'dropShadow'});
     ctx.fillRect(10, 10, 80, 80);
 
     // All parameters specified.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 5,
-       floodColor: "purple", floodOpacity: 0.7});
+      {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 5,
+       floodColor: 'purple', floodOpacity: 0.7});
     ctx.fillRect(110, 10, 80, 80);
 
     // Named color.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 10, dy: 10, stdDeviation: 3,
-       floodColor: "purple"});
+      {filter: 'dropShadow', dx: 10, dy: 10, stdDeviation: 3,
+       floodColor: 'purple'});
     ctx.fillRect(10, 110, 80, 80);
 
     // System color.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-       floodColor: "LinkText"});
+      {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+       floodColor: 'LinkText'});
     ctx.fillRect(110, 110, 80, 80);
 
     // No blur.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 10, dy: 15, stdDeviation: 0,
-       floodColor: "purple"});
+      {filter: 'dropShadow', dx: 10, dy: 15, stdDeviation: 0,
+       floodColor: 'purple'});
     ctx.fillRect(210, 110, 80, 80);
 
     // Numerical color.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 9, dy: 12, stdDeviation: 3,
-       floodColor: "rgba(20, 50, 130, 1)"});
+      {filter: 'dropShadow', dx: 9, dy: 12, stdDeviation: 3,
+       floodColor: 'rgba(20, 50, 130, 1)'});
     ctx.fillRect(310, 110, 80, 80);
 
     // Transparent floodColor.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-       floodColor: "rgba(20, 50, 130, 0.7)"});
+      {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+       floodColor: 'rgba(20, 50, 130, 0.7)'});
     ctx.fillRect(410, 110, 80, 80);
 
     // Transparent floodColor and floodOpacity.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: 15, dy: 10, stdDeviation: 3,
-       floodColor: "rgba(20, 50, 130, 0.7)", floodOpacity: 0.7});
+      {filter: 'dropShadow', dx: 15, dy: 10, stdDeviation: 3,
+       floodColor: 'rgba(20, 50, 130, 0.7)', floodOpacity: 0.7});
     ctx.fillRect(510, 110, 80, 80);
 
     // Degenerate parameter values.
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: [-5], dy: [], stdDeviation: null,
-       floodColor: "purple", floodOpacity: [2]});
+      {filter: 'dropShadow', dx: [-5], dy: [], stdDeviation: null,
+       floodColor: 'purple', floodOpacity: [2]});
     ctx.fillRect(10, 210, 80, 80);
 
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: null, dy: '5', stdDeviation: -5,
-       floodColor: "purple", floodOpacity: '0.8'});
+      {filter: 'dropShadow', dx: null, dy: '5', stdDeviation: -5,
+       floodColor: 'purple', floodOpacity: '0.8'});
     ctx.fillRect(110, 210, 80, 80);
 
     ctx.filter = new CanvasFilter(
-      {filter: "dropShadow", dx: true, dy: ['10'], stdDeviation: false,
-       floodColor: "purple", floodOpacity: ['0.4']});
+      {filter: 'dropShadow', dx: true, dy: ['10'], stdDeviation: false,
+       floodColor: 'purple', floodOpacity: ['0.4']});
     ctx.fillRect(210, 210, 80, 80);
   html_reference: |
-    <style>
-      .background {
-        background-color: teal;
-        position: absolute;
-        left: 0px;
-        width: 620px;
-        height: 50px;
-      }
+    <svg width=620 height=320 xmlns="http://www.w3.org/2000/svg">
+      <rect x=0 y=0 width=100% height=50 fill="teal" />
+      <rect x=0 y=100 width=100% height=50 fill="teal" />
+      <rect x=0 y=200 width=100% height=50 fill="teal" />
 
-      .testcase {
-        position: absolute;
-        background-color: crimson;
-        width: 80px;
-        height: 80px;
-      }
-    </style>
+      <rect x=10 y=10 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(2px 2px 2px black)"/>
+      <rect x=110 y=10 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(15px 10px 5px rgba(128, 0, 128, 0.7))"/>
 
-    <div style="position: relative">
-      <div class='background' style="top: 0px;"></div>
-      <div class='background' style="top: 100px;"></div>
-      <div class='background' style="top: 200px;"></div>
+      <rect x=10 y=110 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(10px 10px 3px purple)"/>
+      <rect x=110 y=110 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(15px 10px 3px LinkText)"/>
+      <rect x=210 y=110 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(10px 15px 0px purple)"/>
+      <rect x=310 y=110 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(9px 12px 3px rgba(20, 50, 130, 1))"/>
+      <rect x=410 y=110 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.7))"/>
+      <rect x=510 y=110 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.49))"/>
 
-      <div class='testcase'
-           style="left: 10px; top: 10px;
-                  filter: drop-shadow(2px 2px 2px black);">
-      </div>
-      <div class='testcase'
-           style="left: 110px; top: 10px;
-                  filter: drop-shadow(15px 10px 5px rgba(128, 0, 128, 0.7));">
-      </div>
-      <div class='testcase'
-           style="left: 10px; top: 110px;
-                  filter: drop-shadow(10px 10px 3px purple)">
-      </div>
-      <div class='testcase'
-           style="left: 110px; top: 110px;
-                  filter: drop-shadow(15px 10px 3px LinkText)">
-      </div>
-      <div class='testcase'
-           style="left: 210px; top: 110px;
-                  filter: drop-shadow(10px 15px 0px purple)">
-      </div>
-      <div class='testcase'
-           style="left: 310px; top: 110px;
-                  filter: drop-shadow(9px 12px 3px rgba(20, 50, 130, 1))">
-      </div>
-      <div class='testcase'
-           style="left: 410px; top: 110px;
-                  filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.7))">
-      </div>
-      <div class='testcase'
-           style="left: 510px; top: 110px;
-                  filter: drop-shadow(15px 10px 3px rgba(20, 50, 130, 0.49))">
-      </div>
-
-      <div class='testcase'
-           style="left: 10px; top: 210px;
-                  filter: drop-shadow(-5px 0px 0px purple);">
-      </div>
-      <div class='testcase'
-           style="left: 110px; top: 210px;
-                  filter: drop-shadow(0px 5px 0px rgba(128, 0, 128, 0.8));">
-      </div>
-      <div class='testcase'
-           style="left: 210px; top: 210px;
-                  filter: drop-shadow(1px 10px 0px rgba(128, 0, 128, 0.4));">
-      </div>
-    </div>
+      <rect x=10 y=210 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(-5px 0px 0px purple)"/>
+      <rect x=110 y=210 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(0px 5px 0px rgba(128, 0, 128, 0.8))"/>
+      <rect x=210 y=210 width=80 height=80 fill="crimson"
+            style="filter: drop-shadow(1px 10px 0px rgba(128, 0, 128, 0.4))"/>
+    </svg>
 
 - name: 2d.filter.canvasFilterObject.dropShadow.exceptions.tentative
   desc: Test exceptions on CanvasFilter() dropShadow object
@@ -521,7 +483,7 @@
       {baseFrequency: Infinity},
       {baseFrequency: undefined},
       {baseFrequency: -Infinity},
-      {baseFrequency: "test"},
+      {baseFrequency: 'test'},
 
       {numOctaves: {}},
       {numOctaves: -1},
@@ -530,7 +492,7 @@
       {numOctaves: undefined},
       {numOctaves: -Infinity},
       {numOctaves: [1, 1]},
-      {numOctaves: "test"},
+      {numOctaves: 'test'},
 
       {seed: {}},
       {seed: NaN},
@@ -538,7 +500,7 @@
       {seed: undefined},
       {seed: -Infinity},
       {seed: [1, 1]},
-      {seed: "test"},
+      {seed: 'test'},
 
       {stitchTiles: {}},
       {stitchTiles: NaN},
@@ -546,14 +508,14 @@
       {stitchTiles: undefined},
       {stitchTiles: -Infinity},
       {stitchTiles: [1, 1]},
-      {stitchTiles: "test"},
+      {stitchTiles: 'test'},
       {stitchTiles: null},
       {stitchTiles: []},
       {stitchTiles: [10]},
       {stitchTiles: 30},
       {stitchTiles: false},
       {stitchTiles: true},
-      {stitchTiles: "10"},
+      {stitchTiles: '10'},
       {stitchTiles: -1},
 
       {type: {}},
@@ -562,14 +524,14 @@
       {type: undefined},
       {type: -Infinity},
       {type: [1, 1]},
-      {type: "test"},
+      {type: 'test'},
       {type: null},
       {type: []},
       {type: [10]},
       {type: 30},
       {type: false},
       {type: true},
-      {type: "10"},
+      {type: '10'},
       {type: -1},
     ]
 
@@ -582,7 +544,7 @@
       {baseFrequency: 30},
       {baseFrequency: false},
       {baseFrequency: true},
-      {baseFrequency: "10"},
+      {baseFrequency: '10'},
 
       {numOctaves: null},
       {numOctaves: []},
@@ -590,7 +552,7 @@
       {numOctaves: 30},
       {numOctaves: false},
       {numOctaves: true},
-      {numOctaves: "10"},
+      {numOctaves: '10'},
 
       {seed: null},
       {seed: []},
@@ -598,22 +560,22 @@
       {seed: 30},
       {seed: false},
       {seed: true},
-      {seed: "10"},
+      {seed: '10'},
       {seed: -1},
 
-      {stitchTiles: "stitch"},
-      {stitchTiles: "noStitch"},
+      {stitchTiles: 'stitch'},
+      {stitchTiles: 'noStitch'},
 
-      {type: "fractalNoise"},
-      {type: "turbulence"},
+      {type: 'fractalNoise'},
+      {type: 'turbulence'},
     ]
 
     for (testCase of errorTestCases) {
-      const filterOptions = {...{filter: "turbulence"}, ...testCase};
+      const filterOptions = {...{filter: 'turbulence'}, ...testCase};
       @assert throws TypeError new CanvasFilter(filterOptions);
     }
 
     for (testCase of workingTestCases) {
-      const filterOptions = {...{filter: "turbulence"}, ...testCase};
+      const filterOptions = {...{filter: 'turbulence'}, ...testCase};
       @assert new CanvasFilter(filterOptions) != null;
     }
diff --git a/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name.html b/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html
similarity index 53%
rename from tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name.html
rename to tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html
index 144217df384..ac82e3396d6 100644
--- a/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name.html
+++ b/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-1.html
@@ -12,7 +12,12 @@
   // This creates a test()
   assert_root_color_scheme("dark", "<meta> set the color-scheme to dark");
 
-  test(() => {
-    assert_equals(document.querySelector(":root:lang(dark)"), document.documentElement);
-  }, "<meta> set the content-language to dark");
+  // We can't test content-language against :lang(), because CSS Selectors 4
+  // references BCP 47 syntax and RFC4647 "Matching of Language Tags", but
+  // "dark" is not a well-formed BCP 47 tag and therefore cannot be matched.
+  // Therefore, the test that content-language gets set is split off to a
+  // separate testcase using a well-formed lang tag as the content.
+  // test(() => {
+  //   assert_equals(document.querySelector(":root:lang(dark)"), document.documentElement);
+  // }, "<meta> set the content-language to dark");
 </script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html b/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html
new file mode 100644
index 00000000000..b73013a341b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/document-metadata/the-meta-element/http-equiv-and-name-2.html
@@ -0,0 +1,13 @@
+<!doctype html>
+<title>Setting both http-equiv and name attributes on a meta element</title>
+<meta http-equiv=content-language name=color-scheme content=de-DE>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+  // We don't attempt to test the color-scheme here because "de-DE" is not a valid
+  // value for it.
+
+  test(() => {
+    assert_equals(document.querySelector(":root:lang(de-DE)"), document.documentElement);
+  }, "<meta> set the content-language to de-DE");
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed-ref.tentative.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed-ref.tentative.html
index 3933b93894b..171829d90f3 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed-ref.tentative.html
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed-ref.tentative.html
@@ -4,12 +4,7 @@
 <link rel="stylesheet" href="/fonts/ahem.css">
 
 <selectmenu id="selectMenu0">
-  <div popover slot="listbox" behavior="listbox">
-    <option>
-      option with image displayed
-      <img src="/images/green-256x256.png">
-    </option>
-  </div>
+  <option>option with image displayed</option>
 </selectmenu>
 <div id=fakelistbox>
   option with image displayed
@@ -17,15 +12,16 @@
 </div>
 
 <style>
-  html {
+  html,selectmenu {
     font-family: Ahem;
   }
   #fakelistbox {
     /* Per spec: */
     display: block;
     position: fixed;
-    top: 20px;
+    top: 30px;
     left: 0;
+    font-size: 0.765625em /* 0.875 * 0.875 */;
     /* Per settings in test file: */
     width: fit-content;
     height: fit-content;
@@ -43,6 +39,6 @@
     position: absolute;
     top: 0px;
     left: 0px;
-    height: 20px;
+    height: 30px;
   }
 </style>
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed.tentative.html b/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed.tentative.html
index 0fad1a1918f..05bc651cb7c 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed.tentative.html
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/selectmenu-option-arbitrary-content-displayed.tentative.html
@@ -9,14 +9,14 @@
 <script src="/resources/testdriver-vendor.js"></script>
 
 <style>
-  html {
+  html,selectmenu {
     font-family: Ahem;
   }
   selectmenu {
     position: absolute;
     top: 0px;
     left: 0px;
-    height: 20px;
+    height: 30px;
   }
 
   [popover] {
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/support/fake-selectmenu.js b/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/support/fake-selectmenu.js
index cf3864a2940..84fe5285617 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/support/fake-selectmenu.js
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/the-selectmenu-element/support/fake-selectmenu.js
@@ -10,17 +10,21 @@ function createFakeSelectmenu(selectedValueText) {
     <style>
     .fake-selectmenu {
       display: inline-block;
+      user-select: none;
+      font-family: sans-serif;
+      font-size: .875em;
     }
 
     .fake-selectmenu-internal-selectmenu-button {
       display: inline-flex;
       align-items: center;
-      background-color: #ffffff;
-      padding: 0 0 0 3px;
-      border: 1px solid #767676;
-      border-radius: 2px;
       cursor: default;
       appearance: none;
+      background-color: Field;
+      color: ButtonText;
+      border: 1px solid ButtonBorder;
+      border-radius: 0.25em;
+      padding: 0.25em;
     }
 
     .fake-selectmenu-internal-selectmenu-button-icon {
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/server/webtransport-h3.https.sub.any.js.ini b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/server/webtransport-h3.https.sub.any.js.ini
index f0041b0aa29..60d2e38ecad 100644
--- a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/server/webtransport-h3.https.sub.any.js.ini
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/server/webtransport-h3.https.sub.any.js.ini
@@ -1,31 +1,29 @@
 [webtransport-h3.https.sub.any.html]
-  disabled:
-    if product == "firefox": times out
   [WebTransport server should be running and should handle a bidirectional stream]
     expected:
-      if product == "chrome": PASS
+      if product == "chrome" or product == "firefox": PASS
+      FAIL
+
+[webtransport-h3.https.sub.any.window.html]
+  [WebTransport server should be running and should handle a bidirectional stream]
+    expected:
+      if product == "chrome" or product == "firefox": PASS
       FAIL
 
 [webtransport-h3.https.sub.any.worker.html]
-  disabled:
-    if product == "firefox": times out
   [WebTransport server should be running and should handle a bidirectional stream]
     expected:
-      if product == "chrome": PASS
+      if product == "chrome" or product == "firefox": PASS
       FAIL
 
 [webtransport-h3.https.sub.any.sharedworker.html]
-  disabled:
-    if product == "firefox": times out
   [WebTransport server should be running and should handle a bidirectional stream]
     expected:
-      if product == "chrome": PASS
+      if product == "chrome" or product == "firefox": PASS
       FAIL
 
 [webtransport-h3.https.sub.any.serviceworker.html]
-  disabled:
-    if product == "firefox": times out
   [WebTransport server should be running and should handle a bidirectional stream]
     expected:
-      if product == "chrome": PASS
+      if product == "chrome" or product == "firefox": PASS
       FAIL
diff --git a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/wheelScroll.html.ini b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/wheelScroll.html.ini
index 647b875e5b0..5632dcf1129 100644
--- a/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/wheelScroll.html.ini
+++ b/tests/wpt/web-platform-tests/infrastructure/metadata/infrastructure/testdriver/actions/wheelScroll.html.ini
@@ -1,3 +1,3 @@
 [wheelScroll.html]
   expected:
-    if product == "firefox" or product == "epiphany": ERROR
+    if product == "epiphany": ERROR
diff --git a/tests/wpt/web-platform-tests/interfaces/EXT_clip_cull_distance.idl b/tests/wpt/web-platform-tests/interfaces/EXT_clip_cull_distance.idl
deleted file mode 100644
index 18d1c02a11a..00000000000
--- a/tests/wpt/web-platform-tests/interfaces/EXT_clip_cull_distance.idl
+++ /dev/null
@@ -1,20 +0,0 @@
-// GENERATED CONTENT - DO NOT EDIT
-// Content was automatically extracted by Reffy into webref
-// (https://github.com/w3c/webref)
-// Source: WebGL EXT_clip_cull_distance Extension Draft Specification (https://registry.khronos.org/webgl/extensions/EXT_clip_cull_distance/)
-
-[Exposed=(Window,Worker), LegacyNoInterfaceObject]
-interface EXT_clip_cull_distance {
-  const GLenum MAX_CLIP_DISTANCES_EXT                       = 0x0D32;
-  const GLenum MAX_CULL_DISTANCES_EXT                       = 0x82F9;
-  const GLenum MAX_COMBINED_CLIP_AND_CULL_DISTANCES_EXT     = 0x82FA;
-
-  const GLenum CLIP_DISTANCE0_EXT                           = 0x3000;
-  const GLenum CLIP_DISTANCE1_EXT                           = 0x3001;
-  const GLenum CLIP_DISTANCE2_EXT                           = 0x3002;
-  const GLenum CLIP_DISTANCE3_EXT                           = 0x3003;
-  const GLenum CLIP_DISTANCE4_EXT                           = 0x3004;
-  const GLenum CLIP_DISTANCE5_EXT                           = 0x3005;
-  const GLenum CLIP_DISTANCE6_EXT                           = 0x3006;
-  const GLenum CLIP_DISTANCE7_EXT                           = 0x3007;
-};
diff --git a/tests/wpt/web-platform-tests/interfaces/FedCM.idl b/tests/wpt/web-platform-tests/interfaces/FedCM.idl
index b3ddb54e0c6..8de87e88b05 100644
--- a/tests/wpt/web-platform-tests/interfaces/FedCM.idl
+++ b/tests/wpt/web-platform-tests/interfaces/FedCM.idl
@@ -3,48 +3,6 @@
 // (https://github.com/w3c/webref)
 // Source: Federated Credential Management API (https://fedidcg.github.io/FedCM/)
 
-dictionary IdentityProviderWellKnown {
-  required sequence<USVString> provider_urls;
-};
-
-dictionary IdentityProviderIcon {
-  required USVString url;
-  unsigned long size;
-};
-
-dictionary IdentityProviderBranding {
-  USVString background_color;
-  USVString color;
-  sequence<IdentityProviderIcon> icons;
-};
-
-dictionary IdentityProviderAPIConfig {
-  required USVString accounts_endpoint;
-  required USVString client_metadata_endpoint;
-  required USVString id_assertion_endpoint;
-  IdentityProviderBranding branding;
-};
-
-dictionary IdentityProviderAccount {
-  required USVString id;
-  required USVString name;
-  required USVString email;
-  USVString given_name;
-  sequence<USVString> approved_clients;
-};
-dictionary IdentityProviderAccountList {
-  sequence<IdentityProviderAccount> accounts;
-};
-
-dictionary IdentityProviderClientMetadata {
-  USVString privacy_policy_url;
-  USVString terms_of_service_url;
-};
-
-dictionary IdentityProviderToken {
-  required USVString token;
-};
-
 [Exposed=Window, SecureContext]
 interface IdentityCredential : Credential {
   readonly attribute USVString? token;
@@ -64,18 +22,46 @@ dictionary IdentityProviderConfig {
   USVString nonce;
 };
 
-dictionary IdentityCredentialLogoutRPsRequest {
+dictionary IdentityProviderWellKnown {
+  required sequence<USVString> provider_urls;
+};
+
+dictionary IdentityProviderIcon {
   required USVString url;
-  required USVString accountId;
+  unsigned long size;
 };
 
-[Exposed=Window, SecureContext]
-partial interface IdentityCredential {
-  static Promise<undefined> logoutRPs(sequence<IdentityCredentialLogoutRPsRequest> logoutRequests);
+dictionary IdentityProviderBranding {
+  USVString background_color;
+  USVString color;
+  sequence<IdentityProviderIcon> icons;
+  USVString name;
 };
 
-[Exposed=Window, SecureContext]
-interface IdentityProvider {
-  static undefined login();
-  static undefined logout();
+dictionary IdentityProviderAPIConfig {
+  required USVString accounts_endpoint;
+  required USVString client_metadata_endpoint;
+  required USVString id_assertion_endpoint;
+  IdentityProviderBranding branding;
+};
+
+dictionary IdentityProviderAccount {
+  required USVString id;
+  required USVString name;
+  required USVString email;
+  USVString given_name;
+  USVString picture;
+  sequence<USVString> approved_clients;
+};
+dictionary IdentityProviderAccountList {
+  sequence<IdentityProviderAccount> accounts;
+};
+
+dictionary IdentityProviderToken {
+  required USVString token;
+};
+
+dictionary IdentityProviderClientMetadata {
+  USVString privacy_policy_url;
+  USVString terms_of_service_url;
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/WEBGL_clip_cull_distance.idl b/tests/wpt/web-platform-tests/interfaces/WEBGL_clip_cull_distance.idl
new file mode 100644
index 00000000000..46fa921fd53
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/WEBGL_clip_cull_distance.idl
@@ -0,0 +1,20 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: WebGL WEBGL_clip_cull_distance Extension Draft Specification (https://registry.khronos.org/webgl/extensions/WEBGL_clip_cull_distance/)
+
+[Exposed=(Window,Worker), LegacyNoInterfaceObject]
+interface WEBGL_clip_cull_distance {
+  const GLenum MAX_CLIP_DISTANCES_WEBGL                   = 0x0D32;
+  const GLenum MAX_CULL_DISTANCES_WEBGL                   = 0x82F9;
+  const GLenum MAX_COMBINED_CLIP_AND_CULL_DISTANCES_WEBGL = 0x82FA;
+
+  const GLenum CLIP_DISTANCE0_WEBGL                       = 0x3000;
+  const GLenum CLIP_DISTANCE1_WEBGL                       = 0x3001;
+  const GLenum CLIP_DISTANCE2_WEBGL                       = 0x3002;
+  const GLenum CLIP_DISTANCE3_WEBGL                       = 0x3003;
+  const GLenum CLIP_DISTANCE4_WEBGL                       = 0x3004;
+  const GLenum CLIP_DISTANCE5_WEBGL                       = 0x3005;
+  const GLenum CLIP_DISTANCE6_WEBGL                       = 0x3006;
+  const GLenum CLIP_DISTANCE7_WEBGL                       = 0x3007;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/WEBGL_provoking_vertex.idl b/tests/wpt/web-platform-tests/interfaces/WEBGL_provoking_vertex.idl
new file mode 100644
index 00000000000..035e1d233d6
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/WEBGL_provoking_vertex.idl
@@ -0,0 +1,13 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: WebGL WEBGL_provoking_vertex Extension Specification (https://registry.khronos.org/webgl/extensions/WEBGL_provoking_vertex/)
+
+[Exposed=(Window,Worker), LegacyNoInterfaceObject]
+interface WEBGL_provoking_vertex {
+    const GLenum FIRST_VERTEX_CONVENTION_WEBGL = 0x8E4D;
+    const GLenum LAST_VERTEX_CONVENTION_WEBGL  = 0x8E4E; // default
+    const GLenum PROVOKING_VERTEX_WEBGL        = 0x8E4F;
+
+    undefined provokingVertexWEBGL(GLenum provokeMode);
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/anchors.idl b/tests/wpt/web-platform-tests/interfaces/anchors.idl
index 5aa9395f09f..d8c5aa69a87 100644
--- a/tests/wpt/web-platform-tests/interfaces/anchors.idl
+++ b/tests/wpt/web-platform-tests/interfaces/anchors.idl
@@ -17,6 +17,8 @@ partial interface XRFrame {
 };
 
 partial interface XRSession {
+  readonly attribute FrozenArray<DOMString> persistentAnchors;
+
   Promise<XRAnchor> restorePersistentAnchor(DOMString uuid);
   Promise<undefined> deletePersistentAnchor(DOMString uuid);
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/badging.idl b/tests/wpt/web-platform-tests/interfaces/badging.idl
index f34dfa7e04a..8b401e057ad 100644
--- a/tests/wpt/web-platform-tests/interfaces/badging.idl
+++ b/tests/wpt/web-platform-tests/interfaces/badging.idl
@@ -3,15 +3,11 @@
 // (https://github.com/w3c/webref)
 // Source: Badging API (https://w3c.github.io/badging/)
 
-[SecureContext]
-partial interface Navigator {
-  Promise<undefined> setClientBadge(optional [EnforceRange] unsigned long long contents);
-  Promise<undefined> clearClientBadge();
-};
-
 [SecureContext]
 interface mixin NavigatorBadge {
-  Promise<undefined> setAppBadge(optional [EnforceRange] unsigned long long contents);
+  Promise<undefined> setAppBadge(
+    optional [EnforceRange] unsigned long long contents
+  );
   Promise<undefined> clearAppBadge();
 };
 
diff --git a/tests/wpt/web-platform-tests/interfaces/compression.idl b/tests/wpt/web-platform-tests/interfaces/compression.idl
index 88be302a4a6..7525d7c9847 100644
--- a/tests/wpt/web-platform-tests/interfaces/compression.idl
+++ b/tests/wpt/web-platform-tests/interfaces/compression.idl
@@ -3,14 +3,20 @@
 // (https://github.com/w3c/webref)
 // Source: Compression Streams (https://wicg.github.io/compression/)
 
+enum CompressionFormat {
+  "deflate",
+  "deflate-raw",
+  "gzip",
+};
+
 [Exposed=*]
 interface CompressionStream {
-  constructor(DOMString format);
+  constructor(CompressionFormat format);
 };
 CompressionStream includes GenericTransformStream;
 
 [Exposed=*]
 interface DecompressionStream {
-  constructor(DOMString format);
+  constructor(CompressionFormat format);
 };
 DecompressionStream includes GenericTransformStream;
diff --git a/tests/wpt/web-platform-tests/interfaces/compute-pressure.idl b/tests/wpt/web-platform-tests/interfaces/compute-pressure.idl
index 42ff4f207ab..3e35dc4ee2d 100644
--- a/tests/wpt/web-platform-tests/interfaces/compute-pressure.idl
+++ b/tests/wpt/web-platform-tests/interfaces/compute-pressure.idl
@@ -3,17 +3,15 @@
 // (https://github.com/w3c/webref)
 // Source: Compute Pressure Level 1 (https://w3c.github.io/compute-pressure/)
 
-enum PressureState { "nominal", "fair", "serious", "critical" };
+enum PressureSource { "thermals", "cpu" };
 
-enum PressureFactor { "thermal", "power-supply" };
+enum PressureState { "nominal", "fair", "serious", "critical" };
 
 callback PressureUpdateCallback = undefined (
   sequence<PressureRecord> changes,
   PressureObserver observer
 );
 
-enum PressureSource { "cpu" };
-
 [Exposed=(DedicatedWorker,SharedWorker,Window), SecureContext]
 interface PressureObserver {
   constructor(PressureUpdateCallback callback, optional PressureObserverOptions options = {});
@@ -30,7 +28,6 @@ interface PressureObserver {
 interface PressureRecord {
   readonly attribute PressureSource source;
   readonly attribute PressureState state;
-  readonly attribute FrozenArray<PressureFactor> factors;
   readonly attribute DOMHighResTimeStamp time;
   [Default] object toJSON();
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/contact-picker.idl b/tests/wpt/web-platform-tests/interfaces/contact-picker.idl
index aece81664e4..0119d0e2ce6 100644
--- a/tests/wpt/web-platform-tests/interfaces/contact-picker.idl
+++ b/tests/wpt/web-platform-tests/interfaces/contact-picker.idl
@@ -1,7 +1,7 @@
 // GENERATED CONTENT - DO NOT EDIT
 // Content was automatically extracted by Reffy into webref
 // (https://github.com/w3c/webref)
-// Source: Contact Picker API (https://w3c.github.io/contact-picker/spec/)
+// Source: Contact Picker API (https://w3c.github.io/contact-picker/)
 
 [Exposed=Window]
 partial interface Navigator {
diff --git a/tests/wpt/web-platform-tests/interfaces/cookie-store.idl b/tests/wpt/web-platform-tests/interfaces/cookie-store.idl
index 72ef3f8c824..f44b4c63546 100644
--- a/tests/wpt/web-platform-tests/interfaces/cookie-store.idl
+++ b/tests/wpt/web-platform-tests/interfaces/cookie-store.idl
@@ -36,7 +36,7 @@ enum CookieSameSite {
 dictionary CookieInit {
   required USVString name;
   required USVString value;
-  EpochTimeStamp? expires = null;
+  DOMHighResTimeStamp? expires = null;
   USVString? domain = null;
   USVString path = "/";
   CookieSameSite sameSite = "strict";
@@ -53,7 +53,7 @@ dictionary CookieListItem {
   USVString value;
   USVString? domain;
   USVString path;
-  EpochTimeStamp? expires;
+  DOMHighResTimeStamp? expires;
   boolean secure;
   CookieSameSite sameSite;
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/css-cascade-6.idl b/tests/wpt/web-platform-tests/interfaces/css-cascade-6.idl
new file mode 100644
index 00000000000..37cdfb82930
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/css-cascade-6.idl
@@ -0,0 +1,10 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: CSS Cascading and Inheritance Level 6 (https://drafts.csswg.org/css-cascade-6/)
+
+[Exposed=Window]
+interface CSSScopeRule : CSSGroupingRule {
+  readonly attribute CSSOMString start;
+  readonly attribute CSSOMString end;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/css-contain.idl b/tests/wpt/web-platform-tests/interfaces/css-contain.idl
index 6b29119617a..be2137a4a6a 100644
--- a/tests/wpt/web-platform-tests/interfaces/css-contain.idl
+++ b/tests/wpt/web-platform-tests/interfaces/css-contain.idl
@@ -4,10 +4,10 @@
 // Source: CSS Containment Module Level 2 (https://drafts.csswg.org/css-contain-2/)
 
 [Exposed=Window]
-interface ContentVisibilityAutoStateChangedEvent : Event {
-  constructor(DOMString type, optional ContentVisibilityAutoStateChangedEventInit eventInitDict = {});
+interface ContentVisibilityAutoStateChangeEvent : Event {
+  constructor(DOMString type, optional ContentVisibilityAutoStateChangeEventInit eventInitDict = {});
   readonly attribute boolean skipped;
 };
-dictionary ContentVisibilityAutoStateChangedEventInit : EventInit {
+dictionary ContentVisibilityAutoStateChangeEventInit : EventInit {
   boolean skipped = false;
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/css-typed-om.idl b/tests/wpt/web-platform-tests/interfaces/css-typed-om.idl
index 595a424e014..0df6a0327a2 100644
--- a/tests/wpt/web-platform-tests/interfaces/css-typed-om.idl
+++ b/tests/wpt/web-platform-tests/interfaces/css-typed-om.idl
@@ -13,9 +13,7 @@ interface CSSStyleValue {
 [Exposed=(Window, Worker, PaintWorklet, LayoutWorklet)]
 interface StylePropertyMapReadOnly {
     iterable<USVString, sequence<CSSStyleValue>>;
-    any get(USVString property);
-    /* 'any' means (undefined or CSSStyleValue) here,
-       see https://github.com/heycam/webidl/issues/60 */
+    (undefined or CSSStyleValue) get(USVString property);
     sequence<CSSStyleValue> getAll(USVString property);
     boolean has(USVString property);
     readonly attribute unsigned long size;
diff --git a/tests/wpt/web-platform-tests/interfaces/css-view-transitions.idl b/tests/wpt/web-platform-tests/interfaces/css-view-transitions.idl
index cf9cb8927e4..745eb1d9691 100644
--- a/tests/wpt/web-platform-tests/interfaces/css-view-transitions.idl
+++ b/tests/wpt/web-platform-tests/interfaces/css-view-transitions.idl
@@ -4,15 +4,15 @@
 // Source: CSS View Transitions Module Level 1 (https://drafts.csswg.org/css-view-transitions-1/)
 
 partial interface Document {
-  ViewTransition startViewTransition(optional UpdateCallback? callback = null);
+  ViewTransition startViewTransition(optional UpdateCallback? updateCallback = null);
 };
 
 callback UpdateCallback = Promise<any> ();
 
 [Exposed=Window]
 interface ViewTransition {
-  undefined skipTransition();
-  readonly attribute Promise<undefined> finished;
-  readonly attribute Promise<undefined> ready;
   readonly attribute Promise<undefined> updateCallbackDone;
+  readonly attribute Promise<undefined> ready;
+  readonly attribute Promise<undefined> finished;
+  undefined skipTransition();
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/device-posture.idl b/tests/wpt/web-platform-tests/interfaces/device-posture.idl
index ba8f9f51f02..0f1dded6313 100644
--- a/tests/wpt/web-platform-tests/interfaces/device-posture.idl
+++ b/tests/wpt/web-platform-tests/interfaces/device-posture.idl
@@ -16,6 +16,5 @@ interface DevicePosture : EventTarget {
 
 enum DevicePostureType {
   "continuous",
-  "folded",
-  "folded-over"
+  "folded"
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/dom.idl b/tests/wpt/web-platform-tests/interfaces/dom.idl
index 96acfc6a717..c5b5c94dbcc 100644
--- a/tests/wpt/web-platform-tests/interfaces/dom.idl
+++ b/tests/wpt/web-platform-tests/interfaces/dom.idl
@@ -618,7 +618,7 @@ callback interface XPathNSResolver {
 
 interface mixin XPathEvaluatorBase {
   [NewObject] XPathExpression createExpression(DOMString expression, optional XPathNSResolver? resolver = null);
-  XPathNSResolver createNSResolver(Node nodeResolver);
+  Node createNSResolver(Node nodeResolver); // legacy
   // XPathResult.ANY_TYPE = 0
   XPathResult evaluate(DOMString expression, Node contextNode, optional XPathNSResolver? resolver = null, optional unsigned short type = 0, optional XPathResult? result = null);
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/edit-context.idl b/tests/wpt/web-platform-tests/interfaces/edit-context.idl
index f5e60bd0d02..91d8af2ea68 100644
--- a/tests/wpt/web-platform-tests/interfaces/edit-context.idl
+++ b/tests/wpt/web-platform-tests/interfaces/edit-context.idl
@@ -3,7 +3,7 @@
 // (https://github.com/w3c/webref)
 // Source: EditContext API (https://w3c.github.io/edit-context/)
 
-partial interface Element {
+partial interface HTMLElement {
      attribute EditContext? editContext;
 };
 
@@ -20,8 +20,8 @@ interface EditContext : EventTarget {
     undefined updateText(unsigned long rangeStart, unsigned long rangeEnd,
         DOMString text);
     undefined updateSelection(unsigned long start, unsigned long end);
-    undefined updateControlBound(DOMRect controlBound);
-    undefined updateSelectionBound(DOMRect selectionBound);
+    undefined updateControlBounds(DOMRect controlBounds);
+    undefined updateSelectionBounds(DOMRect selectionBounds);
     undefined updateCharacterBounds(unsigned long rangeStart, sequence<DOMRect> characterBounds);
 
     sequence<Element> attachedElements();
@@ -31,9 +31,9 @@ interface EditContext : EventTarget {
     readonly attribute unsigned long selectionEnd;
     readonly attribute unsigned long compositionRangeStart;
     readonly attribute unsigned long compositionRangeEnd;
-    readonly attribute boolean isInComposition;
-    readonly attribute DOMRect controlBound;
-    readonly attribute DOMRect selectionBound;
+    readonly attribute boolean isComposing;
+    readonly attribute DOMRect controlBounds;
+    readonly attribute DOMRect selectionBounds;
     readonly attribute unsigned long characterBoundsRangeStart;
     sequence<DOMRect> characterBounds();
 
@@ -44,7 +44,7 @@ interface EditContext : EventTarget {
     attribute EventHandler oncompositionend;
 };
 
-dictionary TextUpdateEventInit {
+dictionary TextUpdateEventInit : EventInit {
     unsigned long updateRangeStart;
     unsigned long updateRangeEnd;
     DOMString text;
@@ -56,7 +56,7 @@ dictionary TextUpdateEventInit {
 
 [Exposed=Window]
 interface TextUpdateEvent : Event {
-    constructor(optional TextUpdateEventInit options = {});
+    constructor(DOMString type, optional TextUpdateEventInit options = {});
     readonly attribute unsigned long updateRangeStart;
     readonly attribute unsigned long updateRangeEnd;
     readonly attribute DOMString text;
@@ -79,35 +79,33 @@ dictionary TextFormatInit {
 [Exposed=Window]
 interface TextFormat {
     constructor(optional TextFormatInit options = {});
-    attribute unsigned long rangeStart;
-    attribute unsigned long rangeEnd;
-    attribute DOMString textColor;
-    attribute DOMString backgroundColor;
-    attribute DOMString underlineStyle;
-    attribute DOMString underlineThickness;
-    attribute DOMString underlineColor;
+    readonly attribute unsigned long rangeStart;
+    readonly attribute unsigned long rangeEnd;
+    readonly attribute DOMString textColor;
+    readonly attribute DOMString backgroundColor;
+    readonly attribute DOMString underlineStyle;
+    readonly attribute DOMString underlineThickness;
+    readonly attribute DOMString underlineColor;
 };
 
-dictionary TextFormatUpdateEventInit {
+dictionary TextFormatUpdateEventInit : EventInit {
     sequence<TextFormat> textFormats;
 };
 
 [Exposed=Window]
 interface TextFormatUpdateEvent : Event {
-    constructor(optional TextFormatUpdateEventInit options = {});
-
+    constructor(DOMString type, optional TextFormatUpdateEventInit options = {});
     sequence<TextFormat> getTextFormats();
 };
 
-dictionary CharacterBoundsUpdateEventInit {
+dictionary CharacterBoundsUpdateEventInit : EventInit {
     unsigned long rangeStart;
     unsigned long rangeEnd;
 };
 
 [Exposed=Window]
 interface CharacterBoundsUpdateEvent : Event {
-    constructor(optional CharacterBoundsUpdateEventInit options = {});
-
+    constructor(DOMString type, optional CharacterBoundsUpdateEventInit options = {});
     readonly attribute unsigned long rangeStart;
     readonly attribute unsigned long rangeEnd;
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/fenced-frame.idl b/tests/wpt/web-platform-tests/interfaces/fenced-frame.idl
new file mode 100644
index 00000000000..2869b95e6bb
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/fenced-frame.idl
@@ -0,0 +1,54 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: Fenced frame (https://wicg.github.io/fenced-frame/)
+
+[Exposed=Window]
+interface HTMLFencedFrameElement : HTMLElement {
+  [HTMLConstructor] constructor();
+
+  [CEReactions] attribute FencedFrameConfig? config;
+  [CEReactions] attribute DOMString width;
+  [CEReactions] attribute DOMString height;
+};
+
+enum OpaqueProperty {"opaque"};
+
+typedef (unsigned long or OpaqueProperty) FencedFrameConfigSize;
+typedef (USVString or OpaqueProperty) FencedFrameConfigURL;
+
+[Exposed=Window]
+interface FencedFrameConfig {
+  constructor(USVString url);
+  readonly attribute FencedFrameConfigURL? url;
+  readonly attribute FencedFrameConfigSize? width;
+  readonly attribute FencedFrameConfigSize? height;
+};
+
+enum FenceReportingDestination {
+  "buyer",
+  "seller",
+  "component-seller",
+  "direct-seller",
+  "shared-storage-select-url",
+};
+
+dictionary FenceEvent {
+  required DOMString eventType;
+  required DOMString eventData;
+  required sequence<FenceReportingDestination> destination;
+};
+
+typedef (FenceEvent or DOMString) ReportEventType;
+
+[Exposed=Window]
+interface Fence {
+    undefined reportEvent(ReportEventType event);
+    undefined setReportEventDataForAutomaticBeacons(FenceEvent event);
+    sequence<FencedFrameConfig> getNestedConfigs();
+};
+
+partial interface Window {
+  // Collection of fenced frame APIs
+  readonly attribute Fence? fence;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/fetch.idl b/tests/wpt/web-platform-tests/interfaces/fetch.idl
index 866d09d31bd..81a5e69aee5 100644
--- a/tests/wpt/web-platform-tests/interfaces/fetch.idl
+++ b/tests/wpt/web-platform-tests/interfaces/fetch.idl
@@ -12,6 +12,7 @@ interface Headers {
   undefined append(ByteString name, ByteString value);
   undefined delete(ByteString name);
   ByteString? get(ByteString name);
+  sequence<ByteString> getSetCookie();
   boolean has(ByteString name);
   undefined set(ByteString name, ByteString value);
   iterable<ByteString, ByteString>;
diff --git a/tests/wpt/web-platform-tests/interfaces/fs.idl b/tests/wpt/web-platform-tests/interfaces/fs.idl
index e341ab387d9..e2474132abf 100644
--- a/tests/wpt/web-platform-tests/interfaces/fs.idl
+++ b/tests/wpt/web-platform-tests/interfaces/fs.idl
@@ -15,7 +15,6 @@ interface FileSystemHandle {
 
   Promise<boolean> isSameEntry(FileSystemHandle other);
 };
-
 dictionary FileSystemCreateWritableOptions {
   boolean keepExistingData = false;
 };
@@ -27,7 +26,6 @@ interface FileSystemFileHandle : FileSystemHandle {
   [Exposed=DedicatedWorker]
   Promise<FileSystemSyncAccessHandle> createSyncAccessHandle();
 };
-
 dictionary FileSystemGetFileOptions {
   boolean create = false;
 };
@@ -51,7 +49,6 @@ interface FileSystemDirectoryHandle : FileSystemHandle {
 
   Promise<sequence<USVString>?> resolve(FileSystemHandle possibleDescendant);
 };
-
 enum WriteCommandType {
   "write",
   "seek",
@@ -73,7 +70,6 @@ interface FileSystemWritableFileStream : WritableStream {
   Promise<undefined> seek(unsigned long long position);
   Promise<undefined> truncate(unsigned long long size);
 };
-
 dictionary FileSystemReadWriteOptions {
   [EnforceRange] unsigned long long at;
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/gamepad-extensions.idl b/tests/wpt/web-platform-tests/interfaces/gamepad-extensions.idl
index ddfc0d9c06a..d7d750654fd 100644
--- a/tests/wpt/web-platform-tests/interfaces/gamepad-extensions.idl
+++ b/tests/wpt/web-platform-tests/interfaces/gamepad-extensions.idl
@@ -67,5 +67,5 @@ partial interface Gamepad {
   readonly attribute FrozenArray<GamepadHapticActuator> hapticActuators;
   readonly attribute GamepadPose? pose;
   readonly attribute FrozenArray<GamepadTouch>? touchEvents;
-  [SameObject] readonly attribute GamepadHapticActuator vibrationActuator;
+  [SameObject] readonly attribute GamepadHapticActuator? vibrationActuator;
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/gpc-spec.idl b/tests/wpt/web-platform-tests/interfaces/gpc-spec.idl
new file mode 100644
index 00000000000..0e9a063c54c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/gpc-spec.idl
@@ -0,0 +1,10 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: Global Privacy Control (GPC) (https://privacycg.github.io/gpc-spec/)
+
+interface mixin GlobalPrivacyControl {
+  readonly attribute boolean globalPrivacyControl;
+};
+Navigator includes GlobalPrivacyControl;
+WorkerNavigator includes GlobalPrivacyControl;
diff --git a/tests/wpt/web-platform-tests/interfaces/html.idl b/tests/wpt/web-platform-tests/interfaces/html.idl
index e4752f079ce..33d4de0db97 100644
--- a/tests/wpt/web-platform-tests/interfaces/html.idl
+++ b/tests/wpt/web-platform-tests/interfaces/html.idl
@@ -127,6 +127,12 @@ interface HTMLElement : Element {
   [CEReactions] attribute [LegacyNullToEmptyString] DOMString outerText;
 
   ElementInternals attachInternals();
+
+  // The popover API
+  undefined showPopover();
+  undefined hidePopover();
+  undefined togglePopover(optional boolean force);
+  [CEReactions] attribute DOMString? popover;
 };
 
 HTMLElement includes GlobalEventHandlers;
@@ -202,6 +208,7 @@ interface HTMLLinkElement : HTMLElement {
   [CEReactions] attribute DOMString referrerPolicy;
   [SameObject, PutForwards=value] readonly attribute DOMTokenList blocking;
   [CEReactions] attribute boolean disabled;
+  [CEReactions] attribute DOMString fetchPriority;
 
   // also has obsolete members
 };
@@ -430,6 +437,7 @@ interface HTMLImageElement : HTMLElement {
   [CEReactions] attribute DOMString referrerPolicy;
   [CEReactions] attribute DOMString decoding;
   [CEReactions] attribute DOMString loading;
+  [CEReactions] attribute DOMString fetchPriority;
 
   Promise<undefined> decode();
 
@@ -929,6 +937,7 @@ interface HTMLInputElement : HTMLElement {
 
   // also has obsolete members
 };
+HTMLInputElement includes PopoverInvokerElement;
 
 [Exposed=Window]
 interface HTMLButtonElement : HTMLElement {
@@ -954,6 +963,7 @@ interface HTMLButtonElement : HTMLElement {
 
   readonly attribute NodeList labels;
 };
+HTMLButtonElement includes PopoverInvokerElement;
 
 [Exposed=Window]
 interface HTMLSelectElement : HTMLElement {
@@ -1214,6 +1224,7 @@ interface HTMLScriptElement : HTMLElement {
   [CEReactions] attribute DOMString integrity;
   [CEReactions] attribute DOMString referrerPolicy;
   [SameObject, PutForwards=value] readonly attribute DOMTokenList blocking;
+  [CEReactions] attribute DOMString fetchPriority;
 
   static boolean supports(DOMString type);
 
@@ -1704,6 +1715,23 @@ dictionary DragEventInit : MouseEventInit {
   DataTransfer? dataTransfer = null;
 };
 
+interface mixin PopoverInvokerElement {
+  [CEReactions] attribute Element? popoverTargetElement;
+  [CEReactions] attribute DOMString popoverTargetAction;
+};
+
+[Exposed=Window]
+interface ToggleEvent : Event {
+  constructor(DOMString type, optional ToggleEventInit eventInitDict = {});
+  readonly attribute DOMString oldState;
+  readonly attribute DOMString newState;
+};
+
+dictionary ToggleEventInit : EventInit {
+  DOMString oldState = "";
+  DOMString newState = "";
+};
+
 [Global=Window,
  Exposed=Window,
  LegacyUnenumerableNamedProperties]
@@ -1737,10 +1765,11 @@ interface Window : EventTarget {
   [Replaceable] readonly attribute WindowProxy? parent;
   readonly attribute Element? frameElement;
   WindowProxy? open(optional USVString url = "", optional DOMString target = "_blank", optional [LegacyNullToEmptyString] DOMString features = "");
-  getter object (DOMString name);
+
   // Since this is the global object, the IDL named getter adds a NamedPropertiesObject exotic
   // object on the prototype chain. Indeed, this does not make the global object an exotic object.
   // Indexed access is taken care of by the WindowProxy exotic object.
+  getter object (DOMString name);
 
   // the user agent
   readonly attribute Navigator navigator;
@@ -1893,6 +1922,7 @@ interface mixin GlobalEventHandlers {
   attribute EventHandler onauxclick;
   attribute EventHandler onbeforeinput;
   attribute EventHandler onbeforematch;
+  attribute EventHandler onbeforetoggle;
   attribute EventHandler onblur;
   attribute EventHandler oncancel;
   attribute EventHandler oncanplay;
diff --git a/tests/wpt/web-platform-tests/interfaces/mediacapture-streams.idl b/tests/wpt/web-platform-tests/interfaces/mediacapture-streams.idl
index 5b41f3fa653..3197ff73689 100644
--- a/tests/wpt/web-platform-tests/interfaces/mediacapture-streams.idl
+++ b/tests/wpt/web-platform-tests/interfaces/mediacapture-streams.idl
@@ -104,19 +104,19 @@ dictionary MediaTrackConstraintSet {
 };
 
 dictionary MediaTrackSettings {
-  long width;
-  long height;
+  unsigned long width;
+  unsigned long height;
   double aspectRatio;
   double frameRate;
   DOMString facingMode;
   DOMString resizeMode;
-  long sampleRate;
-  long sampleSize;
+  unsigned long sampleRate;
+  unsigned long sampleSize;
   boolean echoCancellation;
   boolean autoGainControl;
   boolean noiseSuppression;
   double latency;
-  long channelCount;
+  unsigned long channelCount;
   DOMString deviceId;
   DOMString groupId;
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/navigation-api.idl b/tests/wpt/web-platform-tests/interfaces/navigation-api.idl
deleted file mode 100644
index 11178518292..00000000000
--- a/tests/wpt/web-platform-tests/interfaces/navigation-api.idl
+++ /dev/null
@@ -1,158 +0,0 @@
-// GENERATED CONTENT - DO NOT EDIT
-// Content was automatically extracted by Reffy into webref
-// (https://github.com/w3c/webref)
-// Source: Navigation API (https://wicg.github.io/navigation-api/)
-
-partial interface Window {
-  [Replaceable] readonly attribute Navigation navigation;
-};
-
-[Exposed=Window]
-interface Navigation : EventTarget {
-  sequence<NavigationHistoryEntry> entries();
-  readonly attribute NavigationHistoryEntry? currentEntry;
-  undefined updateCurrentEntry(NavigationUpdateCurrentEntryOptions options);
-  readonly attribute NavigationTransition? transition;
-
-  readonly attribute boolean canGoBack;
-  readonly attribute boolean canGoForward;
-
-  NavigationResult navigate(USVString url, optional NavigationNavigateOptions options = {});
-  NavigationResult reload(optional NavigationReloadOptions options = {});
-
-  NavigationResult traverseTo(DOMString key, optional NavigationOptions options = {});
-  NavigationResult back(optional NavigationOptions options = {});
-  NavigationResult forward(optional NavigationOptions options = {});
-
-  attribute EventHandler onnavigate;
-  attribute EventHandler onnavigatesuccess;
-  attribute EventHandler onnavigateerror;
-  attribute EventHandler oncurrententrychange;
-};
-
-dictionary NavigationUpdateCurrentEntryOptions {
-  required any state;
-};
-
-dictionary NavigationOptions {
-  any info;
-};
-
-dictionary NavigationNavigateOptions : NavigationOptions {
-  any state;
-  NavigationHistoryBehavior history = "auto";
-};
-
-dictionary NavigationReloadOptions : NavigationOptions {
-  any state;
-};
-
-dictionary NavigationResult {
-  Promise<NavigationHistoryEntry> committed;
-  Promise<NavigationHistoryEntry> finished;
-};
-
-enum NavigationHistoryBehavior {
-  "auto",
-  "push",
-  "replace"
-};
-
-[Exposed=Window]
-interface NavigationCurrentEntryChangeEvent : Event {
-  constructor(DOMString type, NavigationCurrentEntryChangeEventInit eventInit);
-
-  readonly attribute NavigationType? navigationType;
-  readonly attribute NavigationHistoryEntry from;
-};
-
-dictionary NavigationCurrentEntryChangeEventInit : EventInit {
-  NavigationType? navigationType = null;
-  required NavigationHistoryEntry destination;
-};
-
-[Exposed=Window]
-interface NavigationTransition {
-  readonly attribute NavigationType navigationType;
-  readonly attribute NavigationHistoryEntry from;
-  readonly attribute Promise<undefined> finished;
-};
-
-[Exposed=Window]
-interface NavigateEvent : Event {
-  constructor(DOMString type, NavigateEventInit eventInit);
-
-  readonly attribute NavigationType navigationType;
-  readonly attribute NavigationDestination destination;
-  readonly attribute boolean canIntercept;
-  readonly attribute boolean userInitiated;
-  readonly attribute boolean hashChange;
-  readonly attribute AbortSignal signal;
-  readonly attribute FormData? formData;
-  readonly attribute DOMString? downloadRequest;
-  readonly attribute any info;
-
-  undefined intercept(optional NavigationInterceptOptions options = {});
-  undefined scroll();
-};
-
-dictionary NavigateEventInit : EventInit {
-  NavigationType navigationType = "push";
-  required NavigationDestination destination;
-  boolean canIntercept = false;
-  boolean userInitiated = false;
-  boolean hashChange = false;
-  required AbortSignal signal;
-  FormData? formData = null;
-  DOMString? downloadRequest = null;
-  any info;
-};
-
-dictionary NavigationInterceptOptions {
-  NavigationInterceptHandler handler;
-  NavigationFocusReset focusReset;
-  NavigationScrollBehavior scroll;
-};
-
-enum NavigationFocusReset {
-  "after-transition",
-  "manual"
-};
-
-enum NavigationScrollBehavior {
-  "after-transition",
-  "manual"
-};
-
-callback NavigationInterceptHandler = Promise<undefined> ();
-
-enum NavigationType {
-  "reload",
-  "push",
-  "replace",
-  "traverse"
-};
-
-[Exposed=Window]
-interface NavigationDestination {
-  readonly attribute USVString url;
-  readonly attribute DOMString? key;
-  readonly attribute DOMString? id;
-  readonly attribute long long index;
-  readonly attribute boolean sameDocument;
-
-  any getState();
-};
-
-[Exposed=Window]
-interface NavigationHistoryEntry : EventTarget {
-  readonly attribute USVString? url;
-  readonly attribute DOMString key;
-  readonly attribute DOMString id;
-  readonly attribute long long index;
-  readonly attribute boolean sameDocument;
-
-  any getState();
-
-  attribute EventHandler ondispose;
-};
diff --git a/tests/wpt/web-platform-tests/interfaces/notifications.idl b/tests/wpt/web-platform-tests/interfaces/notifications.idl
index 2be22213d78..bfcfa2e66af 100644
--- a/tests/wpt/web-platform-tests/interfaces/notifications.idl
+++ b/tests/wpt/web-platform-tests/interfaces/notifications.idl
@@ -72,7 +72,6 @@ dictionary NotificationAction {
 };
 
 callback NotificationPermissionCallback = undefined (NotificationPermission permission);
-
 dictionary GetNotificationOptions {
   DOMString tag = "";
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/orientation-event.idl b/tests/wpt/web-platform-tests/interfaces/orientation-event.idl
index f6ff96f0e01..a93d4658830 100644
--- a/tests/wpt/web-platform-tests/interfaces/orientation-event.idl
+++ b/tests/wpt/web-platform-tests/interfaces/orientation-event.idl
@@ -29,10 +29,6 @@ partial interface Window {
     [SecureContext] attribute EventHandler ondeviceorientationabsolute;
 };
 
-partial interface Window {
-    attribute EventHandler oncompassneedscalibration;
-};
-
 partial interface Window {
     [SecureContext] attribute EventHandler ondevicemotion;
 };
diff --git a/tests/wpt/web-platform-tests/interfaces/permissions-policy.idl b/tests/wpt/web-platform-tests/interfaces/permissions-policy.idl
index 16945e3a9b7..a789d41738c 100644
--- a/tests/wpt/web-platform-tests/interfaces/permissions-policy.idl
+++ b/tests/wpt/web-platform-tests/interfaces/permissions-policy.idl
@@ -18,7 +18,6 @@ partial interface Document {
 partial interface HTMLIFrameElement {
     [SameObject] readonly attribute PermissionsPolicy permissionsPolicy;
 };
-
 [Exposed=Window]
 interface PermissionsPolicyViolationReportBody : ReportBody {
   readonly attribute DOMString featureId;
diff --git a/tests/wpt/web-platform-tests/interfaces/priority-hints.idl b/tests/wpt/web-platform-tests/interfaces/priority-hints.idl
deleted file mode 100644
index cbff6a5222d..00000000000
--- a/tests/wpt/web-platform-tests/interfaces/priority-hints.idl
+++ /dev/null
@@ -1,20 +0,0 @@
-// GENERATED CONTENT - DO NOT EDIT
-// Content was automatically extracted by Reffy into webref
-// (https://github.com/w3c/webref)
-// Source: Priority Hints (https://wicg.github.io/priority-hints/)
-
-partial interface HTMLImageElement {
-    [CEReactions] attribute DOMString fetchPriority;
-};
-
-partial interface HTMLLinkElement {
-    [CEReactions] attribute DOMString fetchPriority;
-};
-
-partial interface HTMLScriptElement {
-    [CEReactions] attribute DOMString fetchPriority;
-};
-
-partial interface HTMLIFrameElement {
-    [CEReactions] attribute DOMString fetchPriority;
-};
diff --git a/tests/wpt/web-platform-tests/interfaces/requestStorageAccessFor.idl b/tests/wpt/web-platform-tests/interfaces/requestStorageAccessFor.idl
new file mode 100644
index 00000000000..adca77a2b03
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/requestStorageAccessFor.idl
@@ -0,0 +1,12 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: requestStorageAccessFor API (https://privacycg.github.io/requestStorageAccessFor/)
+
+partial interface Document {
+  Promise<undefined> requestStorageAccessFor(USVString requestedOrigin);
+};
+
+dictionary TopLevelStorageAccessPermissionDescriptor : PermissionDescriptor {
+    USVString requestedOrigin = "";
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/resource-timing.idl b/tests/wpt/web-platform-tests/interfaces/resource-timing.idl
index 242df0bd804..151e5d46d84 100644
--- a/tests/wpt/web-platform-tests/interfaces/resource-timing.idl
+++ b/tests/wpt/web-platform-tests/interfaces/resource-timing.idl
@@ -6,6 +6,7 @@
 [Exposed=(Window,Worker)]
 interface PerformanceResourceTiming : PerformanceEntry {
     readonly attribute DOMString initiatorType;
+    readonly attribute DOMString deliveryType;
     readonly attribute ByteString nextHopProtocol;
     readonly attribute DOMHighResTimeStamp workerStart;
     readonly attribute DOMHighResTimeStamp redirectStart;
diff --git a/tests/wpt/web-platform-tests/interfaces/scroll-animations.idl b/tests/wpt/web-platform-tests/interfaces/scroll-animations.idl
index 1fd52dece19..14215509c9f 100644
--- a/tests/wpt/web-platform-tests/interfaces/scroll-animations.idl
+++ b/tests/wpt/web-platform-tests/interfaces/scroll-animations.idl
@@ -25,6 +25,7 @@ interface ScrollTimeline : AnimationTimeline {
 dictionary ViewTimelineOptions {
   Element subject;
   ScrollAxis axis = "block";
+  (DOMString or sequence<(CSSNumericValue or CSSKeywordValue)>) inset = "auto";
 };
 
 [Exposed=Window]
diff --git a/tests/wpt/web-platform-tests/interfaces/scroll-to-text-fragment.idl b/tests/wpt/web-platform-tests/interfaces/scroll-to-text-fragment.idl
index ce571ddd694..be7bf73968e 100644
--- a/tests/wpt/web-platform-tests/interfaces/scroll-to-text-fragment.idl
+++ b/tests/wpt/web-platform-tests/interfaces/scroll-to-text-fragment.idl
@@ -1,7 +1,7 @@
 // GENERATED CONTENT - DO NOT EDIT
 // Content was automatically extracted by Reffy into webref
 // (https://github.com/w3c/webref)
-// Source: Text Fragments (https://wicg.github.io/scroll-to-text-fragment/)
+// Source: URL Fragment Text Directives (https://wicg.github.io/scroll-to-text-fragment/)
 
 [Exposed=Window]
 interface FragmentDirective {
diff --git a/tests/wpt/web-platform-tests/interfaces/secure-payment-confirmation.idl b/tests/wpt/web-platform-tests/interfaces/secure-payment-confirmation.idl
index 6b6083b165e..9061b243477 100644
--- a/tests/wpt/web-platform-tests/interfaces/secure-payment-confirmation.idl
+++ b/tests/wpt/web-platform-tests/interfaces/secure-payment-confirmation.idl
@@ -15,7 +15,6 @@ dictionary SecurePaymentConfirmationRequest {
     sequence<USVString> locale;
     boolean showOptOut;
 };
-
 partial dictionary AuthenticationExtensionsClientInputs {
   AuthenticationExtensionsPaymentInputs payment;
 };
@@ -31,11 +30,9 @@ dictionary AuthenticationExtensionsPaymentInputs {
   PaymentCurrencyAmount total;
   PaymentCredentialInstrument instrument;
 };
-
 dictionary CollectedClientPaymentData : CollectedClientData {
     required CollectedClientAdditionalPaymentData payment;
 };
-
 dictionary CollectedClientAdditionalPaymentData {
     required USVString rpId;
     required USVString topOrigin;
@@ -44,16 +41,8 @@ dictionary CollectedClientAdditionalPaymentData {
     required PaymentCurrencyAmount total;
     required PaymentCredentialInstrument instrument;
 };
-
 dictionary PaymentCredentialInstrument {
     required USVString displayName;
     required USVString icon;
     boolean iconMustBeShown = true;
 };
-
-enum TransactionAutomationMode {
-  "none",
-  "autoAccept",
-  "autoReject",
-  "autoOptOut"
-};
diff --git a/tests/wpt/web-platform-tests/interfaces/selection-api.idl b/tests/wpt/web-platform-tests/interfaces/selection-api.idl
index c1eed2a9cf2..a84536ab0f5 100644
--- a/tests/wpt/web-platform-tests/interfaces/selection-api.idl
+++ b/tests/wpt/web-platform-tests/interfaces/selection-api.idl
@@ -12,12 +12,13 @@ interface Selection {
   readonly attribute boolean isCollapsed;
   readonly attribute unsigned long rangeCount;
   readonly attribute DOMString type;
+  readonly attribute DOMString direction;
   Range getRangeAt(unsigned long index);
   undefined addRange(Range range);
   undefined removeRange(Range range);
   undefined removeAllRanges();
   undefined empty();
-  StaticRange getComposedRange(ShadowRoot... shadowRoots);
+  sequence<StaticRange> getComposedRanges(ShadowRoot... shadowRoots);
   undefined collapse(Node? node, optional unsigned long offset = 0);
   undefined setPosition(Node? node, optional unsigned long offset = 0);
   undefined collapseToStart();
diff --git a/tests/wpt/web-platform-tests/interfaces/trust-token-api.idl b/tests/wpt/web-platform-tests/interfaces/trust-token-api.idl
new file mode 100644
index 00000000000..ee339590827
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/trust-token-api.idl
@@ -0,0 +1,29 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: Private State Token API (https://wicg.github.io/trust-token-api/)
+
+enum RefreshPolicy { "none", "refresh" };
+
+enum TokenType { "private-state-token" };
+
+enum TokenVersion { "1" };
+
+enum OperationType { "token-request", "send-redemption-record", "token-redemption" };
+
+dictionary PrivateToken {
+  required TokenType type;
+  required TokenVersion version;
+  required OperationType operation;
+  RefreshPolicy refreshPolicy = "none";
+  sequence<USVString> issuers;
+};
+
+partial dictionary RequestInit {
+  PrivateToken privateToken;
+};
+
+partial interface Document {
+  Promise<boolean> hasPrivateTokens(USVString issuer, USVString type);
+  Promise<boolean> hasRedemptionRecord(USVString issuer, USVString type);
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/turtledove.idl b/tests/wpt/web-platform-tests/interfaces/turtledove.idl
new file mode 100644
index 00000000000..cd81a3d87ef
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/turtledove.idl
@@ -0,0 +1,109 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: FLEDGE (https://wicg.github.io/turtledove/)
+
+[SecureContext]
+partial interface Navigator {
+  Promise<undefined> joinAdInterestGroup(AuctionAdInterestGroup group, double durationSeconds);
+};
+
+dictionary AuctionAd {
+  required USVString renderURL;
+  any metadata;
+};
+
+dictionary AuctionAdInterestGroup {
+  required USVString owner;
+  required USVString name;
+
+  double priority = 0.0;
+  boolean enableBiddingSignalsPrioritization = false;
+  record<DOMString, double> priorityVector;
+  record<DOMString, double> prioritySignalsOverrides;
+
+  DOMString executionMode = "compatibility";
+  USVString biddingLogicURL;
+  USVString biddingWasmHelperURL;
+  USVString dailyUpdateURL;
+  USVString trustedBiddingSignalsURL;
+  sequence<USVString> trustedBiddingSignalsKeys;
+  any userBiddingSignals;
+  sequence<AuctionAd> ads;
+  sequence<AuctionAd> adComponents;
+};
+
+[SecureContext]
+partial interface Navigator {
+  Promise<undefined> leaveAdInterestGroup(AuctionAdInterestGroupKey group);
+};
+
+dictionary AuctionAdInterestGroupKey {
+  required USVString owner;
+  required USVString name;
+};
+
+[SecureContext]
+partial interface Navigator {
+  Promise<USVString?> runAdAuction(AuctionAdConfig config);
+};
+
+dictionary AuctionAdConfig {
+  required USVString seller;
+  required USVString decisionLogicURL;
+  USVString trustedScoringSignalsURL;
+  sequence<USVString> interestGroupBuyers;
+  any auctionSignals;
+  any sellerSignals;
+  USVString directFromSellerSignals;
+  unsigned long long sellerTimeout;
+  unsigned short sellerExperimentGroupId;
+  record<USVString, any> perBuyerSignals;
+  record<USVString, unsigned long long> perBuyerTimeouts;
+  record<USVString, unsigned short> perBuyerGroupLimits;
+  record<USVString, unsigned short> perBuyerExperimentGroupIds;
+  record<USVString, record<USVString, double>> perBuyerPrioritySignals;
+  sequence<AuctionAdConfig> componentAuctions = [];
+  AbortSignal? signal;
+};
+
+[Exposed=InterestGroupBiddingScriptRunnerGlobalScope,
+Global=InterestGroupBiddingScriptRunnerGlobalScope]
+interface InterestGroupBiddingScriptRunnerGlobalScope {
+  boolean setBid();
+  boolean setBid(GenerateBidOutput generateBidOutput);
+  undefined setPriority(double priority);
+  undefined setPrioritySignalsOverride(DOMString key, double priority);
+};
+
+[Exposed=InterestGroupScoringScriptRunnerGlobalScope,
+Global=InterestGroupScoringScriptRunnerGlobalScope]
+interface InterestGroupScoringScriptRunnerGlobalScope {
+};
+
+[Exposed=InterestGroupReportingScriptRunnerGlobalScope,
+Global=InterestGroupReportingScriptRunnerGlobalScope]
+interface InterestGroupReportingScriptRunnerGlobalScope {
+  undefined sendReportTo(DOMString url);
+};
+
+dictionary AdRender {
+  required DOMString url;
+  required DOMString width;
+  required DOMString height;
+};
+
+dictionary GenerateBidOutput {
+  required double bid;
+  required (DOMString or AdRender) adRender;
+  DOMString ad;
+  sequence<(DOMString or AdRender)> adComponents;
+  double adCost;
+  double modelingSignals;
+  boolean allowComponentAuction = false;
+};
+
+[SecureContext]
+partial interface Navigator {
+  undefined updateAdInterestGroups();
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/ua-client-hints.idl b/tests/wpt/web-platform-tests/interfaces/ua-client-hints.idl
index f5070a0e090..c69714b9734 100644
--- a/tests/wpt/web-platform-tests/interfaces/ua-client-hints.idl
+++ b/tests/wpt/web-platform-tests/interfaces/ua-client-hints.idl
@@ -9,16 +9,17 @@ dictionary NavigatorUABrandVersion {
 };
 
 dictionary UADataValues {
-  sequence<NavigatorUABrandVersion> brands;
-  boolean mobile;
   DOMString architecture;
   DOMString bitness;
+  sequence<NavigatorUABrandVersion> brands;
+  DOMString formFactor;
+  sequence<NavigatorUABrandVersion> fullVersionList;
   DOMString model;
+  boolean mobile;
   DOMString platform;
   DOMString platformVersion;
   DOMString uaFullVersion; // deprecated in favor of fullVersionList
   boolean wow64;
-  sequence<NavigatorUABrandVersion> fullVersionList;
 };
 
 dictionary UALowEntropyJSON {
diff --git a/tests/wpt/web-platform-tests/interfaces/url.idl b/tests/wpt/web-platform-tests/interfaces/url.idl
index 360c9adcfa1..6549e45f419 100644
--- a/tests/wpt/web-platform-tests/interfaces/url.idl
+++ b/tests/wpt/web-platform-tests/interfaces/url.idl
@@ -8,6 +8,8 @@
 interface URL {
   constructor(USVString url, optional USVString base);
 
+  static boolean canParse(USVString url, optional USVString base);
+
   stringifier attribute USVString href;
   readonly attribute USVString origin;
            attribute USVString protocol;
@@ -28,6 +30,8 @@ interface URL {
 interface URLSearchParams {
   constructor(optional (sequence<sequence<USVString>> or record<USVString, USVString> or USVString) init = "");
 
+  readonly attribute unsigned long size;
+
   undefined append(USVString name, USVString value);
   undefined delete(USVString name);
   USVString? get(USVString name);
diff --git a/tests/wpt/web-platform-tests/interfaces/wasm-js-api.idl b/tests/wpt/web-platform-tests/interfaces/wasm-js-api.idl
index 141af90fd2d..0d4384251df 100644
--- a/tests/wpt/web-platform-tests/interfaces/wasm-js-api.idl
+++ b/tests/wpt/web-platform-tests/interfaces/wasm-js-api.idl
@@ -8,7 +8,7 @@ dictionary WebAssemblyInstantiatedSource {
     required Instance instance;
 };
 
-[Exposed=(Window,Worker,Worklet)]
+[Exposed=*]
 namespace WebAssembly {
     boolean validate(BufferSource bytes);
     Promise<Module> compile(BufferSource bytes);
@@ -39,7 +39,7 @@ dictionary ModuleImportDescriptor {
   required ImportExportKind kind;
 };
 
-[LegacyNamespace=WebAssembly, Exposed=(Window,Worker,Worklet)]
+[LegacyNamespace=WebAssembly, Exposed=*]
 interface Module {
   constructor(BufferSource bytes);
   static sequence<ModuleExportDescriptor> exports(Module moduleObject);
@@ -47,7 +47,7 @@ interface Module {
   static sequence<ArrayBuffer> customSections(Module moduleObject, DOMString sectionName);
 };
 
-[LegacyNamespace=WebAssembly, Exposed=(Window,Worker,Worklet)]
+[LegacyNamespace=WebAssembly, Exposed=*]
 interface Instance {
   constructor(Module module, optional object importObject);
   readonly attribute object exports;
@@ -58,7 +58,7 @@ dictionary MemoryDescriptor {
   [EnforceRange] unsigned long maximum;
 };
 
-[LegacyNamespace=WebAssembly, Exposed=(Window,Worker,Worklet)]
+[LegacyNamespace=WebAssembly, Exposed=*]
 interface Memory {
   constructor(MemoryDescriptor descriptor);
   unsigned long grow([EnforceRange] unsigned long delta);
@@ -78,7 +78,7 @@ dictionary TableDescriptor {
   [EnforceRange] unsigned long maximum;
 };
 
-[LegacyNamespace=WebAssembly, Exposed=(Window,Worker,Worklet)]
+[LegacyNamespace=WebAssembly, Exposed=*]
 interface Table {
   constructor(TableDescriptor descriptor, optional any value);
   unsigned long grow([EnforceRange] unsigned long delta, optional any value);
@@ -102,7 +102,7 @@ dictionary GlobalDescriptor {
   boolean mutable = false;
 };
 
-[LegacyNamespace=WebAssembly, Exposed=(Window,Worker,Worklet)]
+[LegacyNamespace=WebAssembly, Exposed=*]
 interface Global {
   constructor(GlobalDescriptor descriptor, optional any v);
   any valueOf();
diff --git a/tests/wpt/web-platform-tests/interfaces/web-animations-2.idl b/tests/wpt/web-platform-tests/interfaces/web-animations-2.idl
index 61df2cd1518..f9f68a0d49a 100644
--- a/tests/wpt/web-platform-tests/interfaces/web-animations-2.idl
+++ b/tests/wpt/web-platform-tests/interfaces/web-animations-2.idl
@@ -5,6 +5,7 @@
 
 [Exposed=Window]
 partial interface AnimationTimeline {
+    readonly attribute CSSNumberish? currentTime;
     readonly attribute CSSNumberish? duration;
     Animation play (optional AnimationEffect? effect = null);
 };
@@ -88,6 +89,16 @@ callback EffectCallback = undefined (double? progress,
                                 (Element or CSSPseudoElement) currentTarget,
                                 Animation animation);
 
+dictionary TimelineRangeOffset {
+  CSSOMString? rangeName;
+  CSSNumericValue offset;
+};
+
+partial dictionary KeyframeAnimationOptions {
+    (TimelineRangeOffset or CSSNumericValue or CSSKeywordValue or DOMString) rangeStart = "normal";
+    (TimelineRangeOffset or CSSNumericValue or CSSKeywordValue or DOMString) rangeEnd = "normal";
+};
+
 [Exposed=Window]
 interface AnimationPlaybackEvent : Event {
     constructor(DOMString type, optional AnimationPlaybackEventInit
diff --git a/tests/wpt/web-platform-tests/interfaces/web-animations.idl b/tests/wpt/web-platform-tests/interfaces/web-animations.idl
index ed612302a47..956d700f49b 100644
--- a/tests/wpt/web-platform-tests/interfaces/web-animations.idl
+++ b/tests/wpt/web-platform-tests/interfaces/web-animations.idl
@@ -5,7 +5,6 @@
 
 [Exposed=Window]
 interface AnimationTimeline {
-    readonly attribute double? currentTime;
 };
 
 dictionary DocumentTimelineOptions {
diff --git a/tests/wpt/web-platform-tests/interfaces/web-bluetooth.idl b/tests/wpt/web-platform-tests/interfaces/web-bluetooth.idl
index 21c237040eb..5d461194a83 100644
--- a/tests/wpt/web-platform-tests/interfaces/web-bluetooth.idl
+++ b/tests/wpt/web-platform-tests/interfaces/web-bluetooth.idl
@@ -26,6 +26,7 @@ dictionary BluetoothLEScanFilterInit {
 
 dictionary RequestDeviceOptions {
   sequence<BluetoothLEScanFilterInit> filters;
+  sequence<BluetoothLEScanFilterInit> exclusionFilters;
   sequence<BluetoothServiceUUID> optionalServices = [];
   sequence<unsigned short> optionalManufacturerData = [];
   boolean acceptAllDevices = false;
diff --git a/tests/wpt/web-platform-tests/interfaces/webauthn.idl b/tests/wpt/web-platform-tests/interfaces/webauthn.idl
index ef27322312f..58a9e285232 100644
--- a/tests/wpt/web-platform-tests/interfaces/webauthn.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webauthn.idl
@@ -12,7 +12,6 @@ interface PublicKeyCredential : Credential {
     static Promise<boolean> isConditionalMediationAvailable();
     PublicKeyCredentialJSON toJSON();
 };
-
 typedef DOMString Base64URLString;
 typedef (RegistrationResponseJSON or AuthenticationResponseJSON) PublicKeyCredentialJSON;
 
@@ -49,19 +48,15 @@ dictionary AuthenticatorAssertionResponseJSON {
 
 dictionary AuthenticationExtensionsClientOutputsJSON {
 };
-
 partial dictionary CredentialCreationOptions {
     PublicKeyCredentialCreationOptions      publicKey;
 };
-
 partial dictionary CredentialRequestOptions {
     PublicKeyCredentialRequestOptions      publicKey;
 };
-
 partial interface PublicKeyCredential {
     static Promise<boolean> isUserVerifyingPlatformAuthenticatorAvailable();
 };
-
 partial interface PublicKeyCredential {
     static PublicKeyCredentialCreationOptions parseCreationOptionsFromJSON(PublicKeyCredentialCreationOptionsJSON options);
 };
@@ -92,7 +87,6 @@ dictionary PublicKeyCredentialDescriptorJSON {
 
 dictionary AuthenticationExtensionsClientInputsJSON {
 };
-
 partial interface PublicKeyCredential {
     static PublicKeyCredentialRequestOptions parseRequestOptionsFromJSON(PublicKeyCredentialRequestOptionsJSON options);
 };
@@ -105,12 +99,10 @@ dictionary PublicKeyCredentialRequestOptionsJSON {
     DOMString                                               userVerification = "preferred";
     AuthenticationExtensionsClientInputsJSON                extensions;
 };
-
 [SecureContext, Exposed=Window]
 interface AuthenticatorResponse {
     [SameObject] readonly attribute ArrayBuffer      clientDataJSON;
 };
-
 [SecureContext, Exposed=Window]
 interface AuthenticatorAttestationResponse : AuthenticatorResponse {
     [SameObject] readonly attribute ArrayBuffer      attestationObject;
@@ -119,7 +111,6 @@ interface AuthenticatorAttestationResponse : AuthenticatorResponse {
     ArrayBuffer?                                     getPublicKey();
     COSEAlgorithmIdentifier                          getPublicKeyAlgorithm();
 };
-
 [SecureContext, Exposed=Window]
 interface AuthenticatorAssertionResponse : AuthenticatorResponse {
     [SameObject] readonly attribute ArrayBuffer      authenticatorData;
@@ -127,12 +118,10 @@ interface AuthenticatorAssertionResponse : AuthenticatorResponse {
     [SameObject] readonly attribute ArrayBuffer?     userHandle;
     [SameObject] readonly attribute ArrayBuffer?     attestationObject;
 };
-
 dictionary PublicKeyCredentialParameters {
     required DOMString                    type;
     required COSEAlgorithmIdentifier      alg;
 };
-
 dictionary PublicKeyCredentialCreationOptions {
     required PublicKeyCredentialRpEntity         rp;
     required PublicKeyCredentialUserEntity       user;
@@ -147,45 +136,37 @@ dictionary PublicKeyCredentialCreationOptions {
     sequence<DOMString>                          attestationFormats = [];
     AuthenticationExtensionsClientInputs         extensions;
 };
-
 dictionary PublicKeyCredentialEntity {
     required DOMString    name;
 };
-
 dictionary PublicKeyCredentialRpEntity : PublicKeyCredentialEntity {
     DOMString      id;
 };
-
 dictionary PublicKeyCredentialUserEntity : PublicKeyCredentialEntity {
     required BufferSource   id;
     required DOMString      displayName;
 };
-
 dictionary AuthenticatorSelectionCriteria {
     DOMString                    authenticatorAttachment;
     DOMString                    residentKey;
     boolean                      requireResidentKey = false;
     DOMString                    userVerification = "preferred";
 };
-
 enum AuthenticatorAttachment {
     "platform",
     "cross-platform"
 };
-
 enum ResidentKeyRequirement {
     "discouraged",
     "preferred",
     "required"
 };
-
 enum AttestationConveyancePreference {
     "none",
     "indirect",
     "direct",
     "enterprise"
 };
-
 dictionary PublicKeyCredentialRequestOptions {
     required BufferSource                challenge;
     unsigned long                        timeout;
@@ -196,17 +177,15 @@ dictionary PublicKeyCredentialRequestOptions {
     sequence<DOMString>                  attestationFormats = [];
     AuthenticationExtensionsClientInputs extensions;
 };
-
 dictionary AuthenticationExtensionsClientInputs {
 };
-
 dictionary AuthenticationExtensionsClientOutputs {
 };
-
 dictionary CollectedClientData {
     required DOMString           type;
     required DOMString           challenge;
     required DOMString           origin;
+    DOMString                    topOrigin;
     boolean                      crossOrigin;
 };
 
@@ -216,17 +195,14 @@ dictionary TokenBinding {
 };
 
 enum TokenBindingStatus { "present", "supported" };
-
 enum PublicKeyCredentialType {
     "public-key"
 };
-
 dictionary PublicKeyCredentialDescriptor {
     required DOMString                    type;
     required BufferSource                 id;
     sequence<DOMString>                   transports;
 };
-
 enum AuthenticatorTransport {
     "usb",
     "nfc",
@@ -234,35 +210,27 @@ enum AuthenticatorTransport {
     "hybrid",
     "internal"
 };
-
 typedef long COSEAlgorithmIdentifier;
-
 enum UserVerificationRequirement {
     "required",
     "preferred",
     "discouraged"
 };
-
 partial dictionary AuthenticationExtensionsClientInputs {
   USVString appid;
 };
-
 partial dictionary AuthenticationExtensionsClientOutputs {
   boolean appid;
 };
-
 partial dictionary AuthenticationExtensionsClientInputs {
   USVString appidExclude;
 };
-
 partial dictionary AuthenticationExtensionsClientOutputs {
   boolean appidExclude;
 };
-
 partial dictionary AuthenticationExtensionsClientInputs {
     boolean credProps;
 };
-
 dictionary CredentialPropertiesOutput {
     boolean rk;
 };
@@ -270,10 +238,9 @@ dictionary CredentialPropertiesOutput {
 partial dictionary AuthenticationExtensionsClientOutputs {
     CredentialPropertiesOutput credProps;
 };
-
 dictionary AuthenticationExtensionsPRFValues {
-    required ArrayBuffer first;
-    ArrayBuffer second;
+    required BufferSource first;
+    BufferSource second;
 };
 
 dictionary AuthenticationExtensionsPRFInputs {
@@ -322,14 +289,12 @@ dictionary AuthenticationExtensionsLargeBlobOutputs {
 partial dictionary AuthenticationExtensionsClientInputs {
   boolean uvm;
 };
-
 typedef sequence<unsigned long> UvmEntry;
 typedef sequence<UvmEntry> UvmEntries;
 
 partial dictionary AuthenticationExtensionsClientOutputs {
   UvmEntries uvm;
 };
-
 dictionary AuthenticationExtensionsDevicePublicKeyInputs {
     DOMString attestation = "none";
     sequence<DOMString> attestationFormats = [];
@@ -340,7 +305,6 @@ partial dictionary AuthenticationExtensionsClientInputs {
 };
 
 dictionary AuthenticationExtensionsDevicePublicKeyOutputs {
-    ArrayBuffer authenticatorOutput;
     ArrayBuffer signature;
 };
 
diff --git a/tests/wpt/web-platform-tests/interfaces/webcodecs-av1-codec-registration.idl b/tests/wpt/web-platform-tests/interfaces/webcodecs-av1-codec-registration.idl
new file mode 100644
index 00000000000..00e4493d3c0
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/webcodecs-av1-codec-registration.idl
@@ -0,0 +1,12 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: AV1 WebCodecs Registration (https://w3c.github.io/webcodecs/av1_codec_registration.html)
+
+partial dictionary VideoEncoderEncodeOptions {
+  VideoEncoderEncodeOptionsForAv1 av1;
+};
+
+dictionary VideoEncoderEncodeOptionsForAv1 {
+  unsigned short? quantizer;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/webcodecs-vp9-codec-registration.idl b/tests/wpt/web-platform-tests/interfaces/webcodecs-vp9-codec-registration.idl
new file mode 100644
index 00000000000..aca64a78961
--- /dev/null
+++ b/tests/wpt/web-platform-tests/interfaces/webcodecs-vp9-codec-registration.idl
@@ -0,0 +1,12 @@
+// GENERATED CONTENT - DO NOT EDIT
+// Content was automatically extracted by Reffy into webref
+// (https://github.com/w3c/webref)
+// Source: VP9 WebCodecs Registration (https://w3c.github.io/webcodecs/vp9_codec_registration.html)
+
+partial dictionary VideoEncoderEncodeOptions {
+  VideoEncoderEncodeOptionsForVp9 vp9;
+};
+
+dictionary VideoEncoderEncodeOptionsForVp9 {
+  unsigned short? quantizer;
+};
diff --git a/tests/wpt/web-platform-tests/interfaces/webcodecs.idl b/tests/wpt/web-platform-tests/interfaces/webcodecs.idl
index 68df48584bd..77649029db6 100644
--- a/tests/wpt/web-platform-tests/interfaces/webcodecs.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webcodecs.idl
@@ -4,7 +4,7 @@
 // Source: WebCodecs (https://w3c.github.io/webcodecs/)
 
 [Exposed=(Window,DedicatedWorker), SecureContext]
-interface AudioDecoder {
+interface AudioDecoder : EventTarget {
   constructor(AudioDecoderInit init);
 
   readonly attribute CodecState state;
@@ -28,7 +28,7 @@ dictionary AudioDecoderInit {
 callback AudioDataOutputCallback = undefined(AudioData output);
 
 [Exposed=(Window,DedicatedWorker), SecureContext]
-interface VideoDecoder {
+interface VideoDecoder : EventTarget {
   constructor(VideoDecoderInit init);
 
   readonly attribute CodecState state;
@@ -52,7 +52,7 @@ dictionary VideoDecoderInit {
 callback VideoFrameOutputCallback = undefined(VideoFrame output);
 
 [Exposed=(Window,DedicatedWorker), SecureContext]
-interface AudioEncoder {
+interface AudioEncoder : EventTarget {
   constructor(AudioEncoderInit init);
 
   readonly attribute CodecState state;
@@ -82,7 +82,7 @@ dictionary EncodedAudioChunkMetadata {
 };
 
 [Exposed=(Window,DedicatedWorker), SecureContext]
-interface VideoEncoder {
+interface VideoEncoder : EventTarget {
   constructor(VideoEncoderInit init);
 
   readonly attribute CodecState state;
@@ -174,7 +174,7 @@ dictionary VideoEncoderConfig {
   HardwareAcceleration hardwareAcceleration = "no-preference";
   AlphaOption alpha = "discard";
   DOMString scalabilityMode;
-  BitrateMode bitrateMode = "variable";
+  VideoEncoderBitrateMode bitrateMode = "variable";
   LatencyMode latencyMode = "quality";
 };
 
@@ -198,6 +198,12 @@ dictionary VideoEncoderEncodeOptions {
   boolean keyFrame = false;
 };
 
+enum VideoEncoderBitrateMode {
+  "constant",
+  "variable",
+  "quantizer"
+};
+
 enum CodecState {
   "unconfigured",
   "configured",
diff --git a/tests/wpt/web-platform-tests/interfaces/webgpu.idl b/tests/wpt/web-platform-tests/interfaces/webgpu.idl
index b00e2374e58..284327a5789 100644
--- a/tests/wpt/web-platform-tests/interfaces/webgpu.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webgpu.idl
@@ -26,6 +26,7 @@ interface GPUSupportedLimits {
     readonly attribute unsigned long maxStorageBuffersPerShaderStage;
     readonly attribute unsigned long maxStorageTexturesPerShaderStage;
     readonly attribute unsigned long maxUniformBuffersPerShaderStage;
+    readonly attribute unsigned long maxFragmentCombinedOutputResources;
     readonly attribute unsigned long long maxUniformBufferBindingSize;
     readonly attribute unsigned long long maxStorageBufferBindingSize;
     readonly attribute unsigned long minUniformBufferOffsetAlignment;
@@ -51,6 +52,11 @@ interface GPUSupportedFeatures {
     readonly setlike<DOMString>;
 };
 
+[Exposed=(Window, DedicatedWorker), SecureContext]
+interface WGSLLanguageFeatures {
+    readonly setlike<DOMString>;
+};
+
 [Exposed=(Window, DedicatedWorker), SecureContext]
 interface GPUAdapterInfo {
     readonly attribute DOMString vendor;
@@ -69,6 +75,7 @@ WorkerNavigator includes NavigatorGPU;
 interface GPU {
     Promise<GPUAdapter?> requestAdapter(optional GPURequestAdapterOptions options = {});
     GPUTextureFormat getPreferredCanvasFormat();
+    [SameObject] readonly attribute WGSLLanguageFeatures wgslLanguageFeatures;
 };
 
 dictionary GPURequestAdapterOptions {
@@ -106,7 +113,9 @@ enum GPUFeatureName {
     "timestamp-query",
     "indirect-first-instance",
     "shader-f16",
-    "rg11b10ufloat-renderable"
+    "rg11b10ufloat-renderable",
+    "bgra8unorm-storage",
+    "float32-filterable"
 };
 
 [Exposed=(Window, DedicatedWorker), SecureContext]
@@ -168,7 +177,7 @@ dictionary GPUBufferDescriptor : GPUObjectDescriptorBase {
 };
 
 typedef [EnforceRange] unsigned long GPUBufferUsageFlags;
-[Exposed=(Window, DedicatedWorker)]
+[Exposed=(Window, DedicatedWorker), SecureContext]
 namespace GPUBufferUsage {
     const GPUFlagsConstant MAP_READ      = 0x0001;
     const GPUFlagsConstant MAP_WRITE     = 0x0002;
@@ -183,7 +192,7 @@ namespace GPUBufferUsage {
 };
 
 typedef [EnforceRange] unsigned long GPUMapModeFlags;
-[Exposed=(Window, DedicatedWorker)]
+[Exposed=(Window, DedicatedWorker), SecureContext]
 namespace GPUMapMode {
     const GPUFlagsConstant READ  = 0x0001;
     const GPUFlagsConstant WRITE = 0x0002;
@@ -223,7 +232,7 @@ enum GPUTextureDimension {
 };
 
 typedef [EnforceRange] unsigned long GPUTextureUsageFlags;
-[Exposed=(Window, DedicatedWorker)]
+[Exposed=(Window, DedicatedWorker), SecureContext]
 namespace GPUTextureUsage {
     const GPUFlagsConstant COPY_SRC          = 0x01;
     const GPUFlagsConstant COPY_DST          = 0x02;
@@ -384,7 +393,6 @@ enum GPUTextureFormat {
 
 [Exposed=(Window, DedicatedWorker), SecureContext]
 interface GPUExternalTexture {
-    readonly attribute boolean expired;
 };
 GPUExternalTexture includes GPUObjectBase;
 
@@ -459,7 +467,7 @@ dictionary GPUBindGroupLayoutEntry {
 };
 
 typedef [EnforceRange] unsigned long GPUShaderStageFlags;
-[Exposed=(Window, DedicatedWorker)]
+[Exposed=(Window, DedicatedWorker), SecureContext]
 namespace GPUShaderStage {
     const GPUFlagsConstant VERTEX   = 0x1;
     const GPUFlagsConstant FRAGMENT = 0x2;
@@ -549,7 +557,7 @@ dictionary GPUPipelineLayoutDescriptor : GPUObjectDescriptorBase {
 
 [Exposed=(Window, DedicatedWorker), SecureContext]
 interface GPUShaderModule {
-    Promise<GPUCompilationInfo> compilationInfo();
+    Promise<GPUCompilationInfo> getCompilationInfo();
 };
 GPUShaderModule includes GPUObjectBase;
 
@@ -586,7 +594,7 @@ interface GPUCompilationInfo {
 
 [Exposed=(Window, DedicatedWorker), SecureContext, Serializable]
 interface GPUPipelineError : DOMException {
-    constructor(DOMString message, GPUPipelineErrorInit options);
+    constructor((DOMString or undefined) message, GPUPipelineErrorInit options);
     readonly attribute GPUPipelineErrorReason reason;
 };
 
@@ -695,7 +703,7 @@ dictionary GPUBlendState {
 };
 
 typedef [EnforceRange] unsigned long GPUColorWriteFlags;
-[Exposed=(Window, DedicatedWorker)]
+[Exposed=(Window, DedicatedWorker), SecureContext]
 namespace GPUColorWrite {
     const GPUFlagsConstant RED   = 0x1;
     const GPUFlagsConstant GREEN = 0x2;
@@ -737,8 +745,8 @@ enum GPUBlendOperation {
 dictionary GPUDepthStencilState {
     required GPUTextureFormat format;
 
-    boolean depthWriteEnabled = false;
-    GPUCompareFunction depthCompare = "always";
+    required boolean depthWriteEnabled;
+    required GPUCompareFunction depthCompare;
 
     GPUStencilFaceState stencilFront = {};
     GPUStencilFaceState stencilBack = {};
@@ -829,34 +837,11 @@ dictionary GPUVertexAttribute {
     required GPUIndex32 shaderLocation;
 };
 
-dictionary GPUImageDataLayout {
-    GPUSize64 offset = 0;
-    GPUSize32 bytesPerRow;
-    GPUSize32 rowsPerImage;
-};
-
-dictionary GPUImageCopyBuffer : GPUImageDataLayout {
-    required GPUBuffer buffer;
-};
-
-dictionary GPUImageCopyTexture {
-    required GPUTexture texture;
-    GPUIntegerCoordinate mipLevel = 0;
-    GPUOrigin3D origin = {};
-    GPUTextureAspect aspect = "all";
-};
-
-dictionary GPUImageCopyTextureTagged : GPUImageCopyTexture {
-    PredefinedColorSpace colorSpace = "srgb";
-    boolean premultipliedAlpha = false;
-};
-
-dictionary GPUImageCopyExternalImage {
-    required (ImageBitmap or HTMLVideoElement or HTMLCanvasElement or OffscreenCanvas) source;
-    GPUOrigin2D origin = {};
-    boolean flipY = false;
-};
-
+dictionary GPUImageDataLayout {    GPUSize64 offset = 0;    GPUSize32 bytesPerRow;    GPUSize32 rowsPerImage;};
+dictionary GPUImageCopyBuffer : GPUImageDataLayout {    required GPUBuffer buffer;};
+dictionary GPUImageCopyTexture {    required GPUTexture texture;    GPUIntegerCoordinate mipLevel = 0;    GPUOrigin3D origin = {};    GPUTextureAspect aspect = "all";};
+dictionary GPUImageCopyTextureTagged : GPUImageCopyTexture {    PredefinedColorSpace colorSpace = "srgb";    boolean premultipliedAlpha = false;};
+dictionary GPUImageCopyExternalImage {    required (ImageBitmap or HTMLVideoElement or HTMLCanvasElement or OffscreenCanvas) source;    GPUOrigin2D origin = {};    boolean flipY = false;};
 [Exposed=(Window, DedicatedWorker), SecureContext]
 interface GPUCommandBuffer {
 };
@@ -1021,7 +1006,7 @@ dictionary GPURenderPassColorAttachment {
 dictionary GPURenderPassDepthStencilAttachment {
     required GPUTextureView view;
 
-    float depthClearValue = 0;
+    float depthClearValue;
     GPULoadOp depthLoadOp;
     GPUStoreOp depthStoreOp;
     boolean depthReadOnly = false;
@@ -1161,12 +1146,13 @@ dictionary GPUCanvasConfiguration {
 };
 
 enum GPUDeviceLostReason {
+    "unknown",
     "destroyed"
 };
 
 [Exposed=(Window, DedicatedWorker), SecureContext]
 interface GPUDeviceLostInfo {
-    readonly attribute (GPUDeviceLostReason or undefined) reason;
+    readonly attribute GPUDeviceLostReason reason;
     readonly attribute DOMString message;
 };
 
diff --git a/tests/wpt/web-platform-tests/interfaces/webidl.idl b/tests/wpt/web-platform-tests/interfaces/webidl.idl
index 9993673361a..7271f19dfa6 100644
--- a/tests/wpt/web-platform-tests/interfaces/webidl.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webidl.idl
@@ -46,5 +46,3 @@ interface DOMException { // but see below note about ECMAScript binding
 
 callback Function = any (any... arguments);
 callback VoidFunction = undefined ();
-
-typedef unsigned long long DOMTimeStamp;
diff --git a/tests/wpt/web-platform-tests/interfaces/webnn.idl b/tests/wpt/web-platform-tests/interfaces/webnn.idl
index 820c79e9666..2c2ab35e909 100644
--- a/tests/wpt/web-platform-tests/interfaces/webnn.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webnn.idl
@@ -146,7 +146,7 @@ interface MLGraphBuilder {
 dictionary MLBatchNormalizationOptions {
   MLOperand scale;
   MLOperand bias;
-  long axis = 1;
+  unsigned long axis = 1;
   float epsilon = 1e-5;
   MLActivation activation;
 };
@@ -167,7 +167,7 @@ partial interface MLGraphBuilder {
 };
 
 partial interface MLGraphBuilder {
-  MLOperand concat(sequence<MLOperand> inputs, long axis);
+  MLOperand concat(sequence<MLOperand> inputs, unsigned long axis);
 };
 
 enum MLConv2dFilterOperandLayout {
@@ -409,7 +409,10 @@ dictionary MLPadOptions {
 };
 
 partial interface MLGraphBuilder {
-  MLOperand pad(MLOperand input, MLOperand padding, optional MLPadOptions options = {});
+  MLOperand pad(MLOperand input,
+                sequence<unsigned long> beginningPadding,
+                sequence<unsigned long> endingPadding,
+                optional MLPadOptions options = {});
 };
 
 enum MLRoundingType {
@@ -434,8 +437,12 @@ partial interface MLGraphBuilder {
   MLOperand maxPool2d(MLOperand input, optional MLPool2dOptions options = {});
 };
 
+partial interface MLGraphBuilder {
+  MLOperand prelu(MLOperand x, MLOperand slope);
+};
+
 dictionary MLReduceOptions {
-  sequence<long> axes = null;
+  sequence<unsigned long> axes = null;
   boolean keepDimensions = false;
 };
 
@@ -466,7 +473,7 @@ dictionary MLResample2dOptions {
   MLInterpolationMode mode = "nearest-neighbor";
   sequence<float> scales;
   sequence<unsigned long> sizes;
-  sequence<long> axes;
+  sequence<unsigned long> axes;
 };
 
 partial interface MLGraphBuilder {
@@ -483,7 +490,7 @@ partial interface MLGraphBuilder {
 };
 
 dictionary MLSliceOptions {
-  sequence<long> axes;
+  sequence<unsigned long> axes;
 };
 
 partial interface MLGraphBuilder {
@@ -511,7 +518,7 @@ partial interface MLGraphBuilder {
 };
 
 dictionary MLSplitOptions {
-  long axis = 0;
+  unsigned long axis = 0;
 };
 
 partial interface MLGraphBuilder {
@@ -521,7 +528,7 @@ partial interface MLGraphBuilder {
 };
 
 dictionary MLSqueezeOptions {
-  sequence<long> axes;
+  sequence<unsigned long> axes;
 };
 
 partial interface MLGraphBuilder {
@@ -534,7 +541,7 @@ partial interface MLGraphBuilder {
 };
 
 dictionary MLTransposeOptions {
-  sequence<long> permutation;
+  sequence<unsigned long> permutation;
 };
 
 partial interface MLGraphBuilder {
diff --git a/tests/wpt/web-platform-tests/interfaces/webrtc-encoded-transform.idl b/tests/wpt/web-platform-tests/interfaces/webrtc-encoded-transform.idl
index 13f3999db12..e48f1080c41 100644
--- a/tests/wpt/web-platform-tests/interfaces/webrtc-encoded-transform.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webrtc-encoded-transform.idl
@@ -89,6 +89,7 @@ dictionary RTCEncodedAudioFrameMetadata {
     unsigned long synchronizationSource;
     octet payloadType;
     sequence<unsigned long> contributingSources;
+    short sequenceNumber;
 };
 
 [Exposed=(Window,DedicatedWorker)]
diff --git a/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl b/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
index f1dca4a923d..7e820a26df4 100644
--- a/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webrtc-stats.idl
@@ -105,7 +105,7 @@ dictionary RTCRemoteInboundRtpStreamStats : RTCReceivedRtpStreamStats {
 };
 
 dictionary RTCSentRtpStreamStats : RTCRtpStreamStats {
-             unsigned long      packetsSent;
+             unsigned long long packetsSent;
              unsigned long long bytesSent;
 };
 
diff --git a/tests/wpt/web-platform-tests/interfaces/webrtc.idl b/tests/wpt/web-platform-tests/interfaces/webrtc.idl
index d631169f46f..578cbe92974 100644
--- a/tests/wpt/web-platform-tests/interfaces/webrtc.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webrtc.idl
@@ -1,7 +1,7 @@
 // GENERATED CONTENT - DO NOT EDIT
 // Content was automatically extracted by Reffy into webref
 // (https://github.com/w3c/webref)
-// Source: WebRTC 1.0: Real-Time Communication Between Browsers (https://w3c.github.io/webrtc-pc/)
+// Source: WebRTC: Real-Time Communication in Browsers (https://w3c.github.io/webrtc-pc/)
 
 dictionary RTCConfiguration {
   sequence<RTCIceServer> iceServers = [];
@@ -51,29 +51,29 @@ enum RTCSignalingState {
 };
 
 enum RTCIceGatheringState {
-"new",
-"gathering",
-"complete"
-     };
+  "new",
+  "gathering",
+  "complete"
+};
 
 enum RTCPeerConnectionState {
-"closed",
-"failed",
-"disconnected",
-"new",
-"connecting",
-"connected"
-     };
+  "closed",
+  "failed",
+  "disconnected",
+  "new",
+  "connecting",
+  "connected"
+};
 
 enum RTCIceConnectionState {
-"closed",
-"failed",
-"disconnected",
-"new",
-"checking",
-"completed",
-"connected"
-     };
+  "closed",
+  "failed",
+  "disconnected",
+  "new",
+  "checking",
+  "completed",
+  "connected"
+};
 
 [Exposed=Window]
 interface RTCPeerConnection : EventTarget  {
@@ -332,28 +332,27 @@ dictionary RTCRtpHeaderExtensionParameters {
   boolean encrypted = false;
 };
 
-dictionary RTCRtpCodecParameters {
-  required octet payloadType;
+dictionary RTCRtpCodec {
   required DOMString mimeType;
   required unsigned long clockRate;
   unsigned short channels;
   DOMString sdpFmtpLine;
 };
 
+dictionary RTCRtpCodecParameters : RTCRtpCodec {
+  required octet payloadType;
+};
+
 dictionary RTCRtpCapabilities {
   required sequence<RTCRtpCodecCapability> codecs;
   required sequence<RTCRtpHeaderExtensionCapability> headerExtensions;
 };
 
-dictionary RTCRtpCodecCapability {
-  required DOMString mimeType;
-  required unsigned long clockRate;
-  unsigned short channels;
-  DOMString sdpFmtpLine;
+dictionary RTCRtpCodecCapability : RTCRtpCodec {
 };
 
 dictionary RTCRtpHeaderExtensionCapability {
-  DOMString uri;
+  required DOMString uri;
 };
 
 [Exposed=Window]
diff --git a/tests/wpt/web-platform-tests/interfaces/webtransport.idl b/tests/wpt/web-platform-tests/interfaces/webtransport.idl
index ba705807f12..2bea483e1b9 100644
--- a/tests/wpt/web-platform-tests/interfaces/webtransport.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webtransport.idl
@@ -9,10 +9,10 @@ interface WebTransportDatagramDuplexStream {
   readonly attribute WritableStream writable;
 
   readonly attribute unsigned long maxDatagramSize;
-  attribute double? incomingMaxAge;
-  attribute double? outgoingMaxAge;
-  attribute long incomingHighWaterMark;
-  attribute long outgoingHighWaterMark;
+  attribute unrestricted double incomingMaxAge;
+  attribute unrestricted double outgoingMaxAge;
+  attribute unrestricted double incomingHighWaterMark;
+  attribute unrestricted double outgoingHighWaterMark;
 };
 
 [Exposed=(Window,Worker), SecureContext]
@@ -24,6 +24,7 @@ interface WebTransport {
   readonly attribute WebTransportReliabilityMode reliability;
   readonly attribute WebTransportCongestionControl congestionControl;
   readonly attribute Promise<WebTransportCloseInfo> closed;
+  readonly attribute Promise<undefined> draining;
   undefined close(optional WebTransportCloseInfo closeInfo = {});
 
   readonly attribute WebTransportDatagramDuplexStream datagrams;
@@ -85,6 +86,7 @@ dictionary WebTransportStats {
   DOMHighResTimeStamp rttVariation;
   DOMHighResTimeStamp minRtt;
   WebTransportDatagramStats datagrams;
+  unsigned long long? estimatedSendRate;
 };
 
 dictionary WebTransportDatagramStats {
@@ -123,17 +125,17 @@ interface WebTransportBidirectionalStream {
   readonly attribute WebTransportSendStream writable;
 };
 
-[Exposed=(Window,Worker), SecureContext]
+[Exposed=(Window,Worker), Serializable, SecureContext]
 interface WebTransportError : DOMException {
-  constructor(optional WebTransportErrorInit init = {});
+  constructor(optional DOMString message = "", optional WebTransportErrorOptions options = {});
 
   readonly attribute WebTransportErrorSource source;
   readonly attribute octet? streamErrorCode;
 };
 
-dictionary WebTransportErrorInit {
-  [Clamp] octet streamErrorCode;
-  DOMString message;
+dictionary WebTransportErrorOptions {
+  WebTransportErrorSource source = "stream";
+  [Clamp] octet? streamErrorCode = null;
 };
 
 enum WebTransportErrorSource {
diff --git a/tests/wpt/web-platform-tests/interfaces/webxr.idl b/tests/wpt/web-platform-tests/interfaces/webxr.idl
index 939da53364d..de2b04691b3 100644
--- a/tests/wpt/web-platform-tests/interfaces/webxr.idl
+++ b/tests/wpt/web-platform-tests/interfaces/webxr.idl
@@ -41,6 +41,7 @@ enum XRVisibilityState {
   [SameObject] readonly attribute XRRenderState renderState;
   [SameObject] readonly attribute XRInputSourceArray inputSources;
   readonly attribute FrozenArray<DOMString> enabledFeatures;
+  readonly attribute boolean isSystemKeyboardSupported;
 
   // Methods
   undefined updateRenderState(optional XRRenderStateInit state = {});
diff --git a/tests/wpt/web-platform-tests/interfaces/window-placement.idl b/tests/wpt/web-platform-tests/interfaces/window-management.idl
similarity index 93%
rename from tests/wpt/web-platform-tests/interfaces/window-placement.idl
rename to tests/wpt/web-platform-tests/interfaces/window-management.idl
index ac86c1d502a..527c41deb6c 100644
--- a/tests/wpt/web-platform-tests/interfaces/window-placement.idl
+++ b/tests/wpt/web-platform-tests/interfaces/window-management.idl
@@ -1,7 +1,7 @@
 // GENERATED CONTENT - DO NOT EDIT
 // Content was automatically extracted by Reffy into webref
 // (https://github.com/w3c/webref)
-// Source: Multi-Screen Window Placement (https://w3c.github.io/window-placement/)
+// Source: Window Management (https://w3c.github.io/window-management/)
 
 partial interface Screen /* : EventTarget */ {
   [SecureContext]
diff --git a/tests/wpt/web-platform-tests/interfaces/xhr.idl b/tests/wpt/web-platform-tests/interfaces/xhr.idl
index 3abd09ce5ed..b4c27c8aca9 100644
--- a/tests/wpt/web-platform-tests/interfaces/xhr.idl
+++ b/tests/wpt/web-platform-tests/interfaces/xhr.idl
@@ -70,7 +70,7 @@ typedef (File or USVString) FormDataEntryValue;
 
 [Exposed=(Window,Worker)]
 interface FormData {
-  constructor(optional HTMLFormElement form);
+  constructor(optional HTMLFormElement form, optional HTMLElement? submitter = null);
 
   undefined append(USVString name, USVString value);
   undefined append(USVString name, Blob blobValue, optional USVString filename);
diff --git a/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-blocking-duration.html b/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-blocking-duration.html
new file mode 100644
index 00000000000..3514d413e9e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-blocking-duration.html
@@ -0,0 +1,57 @@
+<!DOCTYPE HTML>
+<meta charset=utf-8>
+<title>Long Animation Frame Timing: basic</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/utils.js"></script>
+
+<body>
+<h1>Long Animation Frame: blocking duration</h1>
+<div id="log"></div>
+<script>
+
+function loaf_blocking_duration_test(run, label) {
+  const OVERHEAD_EPSILON = 5;
+  const BLOCKING_THRESHOLD = 50;
+  promise_test(async t => {
+    const longtask_promise = new Promise(resolve => new PerformanceObserver(
+      (entries, observer) => {
+        resolve(entries.getEntries());
+        observer.disconnect();
+    }).observe({entryTypes: ["longtask"]}));
+    const [longtask_entries, loaf_entry] = await Promise.all(
+      [longtask_promise, expect_long_frame(run, t)]);
+    const overlapping = longtask_entries.filter(longtask =>
+      (longtask.startTime >= loaf_entry.startTime &&
+        longtask.startTime < (loaf_entry.startTime + loaf_entry.duration) &&
+        (!loaf_entry.renderStart ||
+        (longtask.startTime < loaf_entry.renderStart - OVERHEAD_EPSILON))));
+
+    const longest_index = overlapping.reduce(
+      (max, cur, i) => cur > overlapping[max] ? i : max, 0);
+    let expected_blocking_duration = 0;
+    overlapping.forEach(({duration}, i) => {
+      if (i === longest_index && loaf_entry.renderStart)
+        duration += loaf_entry.startTime + loaf_entry.duration -
+        loaf_entry.renderStart;
+      expected_blocking_duration += Math.max(0, duration - BLOCKING_THRESHOLD);
+    });
+
+    if (!overlapping.length && loaf_entry.renderStart)
+      expected_blocking_duration =
+         Math.max(0,
+          loaf_entry.startTime + loaf_entry.duration - loaf_entry.renderStart -
+          BLOCKING_THRESHOLD);
+    assert_approx_equals(loaf_entry.blockingDuration,
+      expected_blocking_duration,
+      OVERHEAD_EPSILON);
+  }, `LoAF blockingDuration should be equivalent to long tasks: ${label}`);
+}
+
+loaf_blocking_duration_test(t => t.step_timeout(busy_wait), "Non-rendering");
+loaf_blocking_duration_test(t => t.step_timeout(() => {
+  busy_wait();
+  requestAnimationFrame(busy_wait);
+}), "Rendering");
+</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-toJSON.html b/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-toJSON.html
index f78e95da6d1..5b249e69724 100644
--- a/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-toJSON.html
+++ b/tests/wpt/web-platform-tests/long-animation-frame/tentative/loaf-toJSON.html
@@ -31,7 +31,9 @@
         'startTime',
         'duration',
         'renderStart',
-        'styleAndLayoutStart'
+        'styleAndLayoutStart',
+        'blockingTime',
+        'firstUIEventTimestamp'
     ];
     for (const key of performanceEntryKeys) {
         assert_equals(entryJSON[key], entry[key],
diff --git a/tests/wpt/web-platform-tests/mediacapture-record/utils/peerconnection.js b/tests/wpt/web-platform-tests/mediacapture-record/utils/peerconnection.js
index 26a925abf07..8b0f266faca 100644
--- a/tests/wpt/web-platform-tests/mediacapture-record/utils/peerconnection.js
+++ b/tests/wpt/web-platform-tests/mediacapture-record/utils/peerconnection.js
@@ -13,9 +13,9 @@
  * @param {!RTCPeerConnection} pc2 The second peer connection.
  */
 async function exchangeOfferAnswer(pc1, pc2) {
-  await pc1.setLocalDescription(await pc1.createOffer());
+  await pc1.setLocalDescription();
   await pc2.setRemoteDescription(pc1.localDescription);
-  await pc2.setLocalDescription(await pc2.createAnswer());
+  await pc2.setLocalDescription();
   await pc1.setRemoteDescription(pc2.localDescription);
 }
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-crossdocument-crossorigin-sameorigindomain.sub.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-crossdocument-crossorigin-sameorigindomain.sub.html
index 676672a230f..004e1a75e3d 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-crossdocument-crossorigin-sameorigindomain.sub.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-crossdocument-crossorigin-sameorigindomain.sub.html
@@ -30,8 +30,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, link.href, "destination.url");
       assert_false(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-crossdocument-sameorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-crossdocument-sameorigin.html
index 41c3ca71eef..683875d0062 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-crossdocument-sameorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-crossdocument-sameorigin.html
@@ -18,8 +18,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, link.href, "destination.url");
       assert_false(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-crossorigin-sameorigindomain.sub.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-crossorigin-sameorigindomain.sub.html
index a467ecf9d73..60d1653a3ab 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-crossorigin-sameorigindomain.sub.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-crossorigin-sameorigindomain.sub.html
@@ -30,8 +30,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, link.href, "destination.url");
       assert_true(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-crossorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-crossorigin.html
index b9fa97f6d52..ee01e7f1f2d 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-crossorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-crossorigin.html
@@ -28,8 +28,8 @@ async_test(t => {
     assert_equals(e.data.formData, null, "formData");
     assert_equals(e.data.destination.url, link.href, "destination.url");
     assert_true(e.data.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.data.destination.key, null, "destination.key");
-    assert_equals(e.data.destination.id, null, "destination.id");
+    assert_equals(e.data.destination.key, "", "destination.key");
+    assert_equals(e.data.destination.id, "", "destination.id");
     assert_equals(e.data.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-sameorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-sameorigin.html
index 566bea3dc7e..eaa7b523457 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-sameorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/click-samedocument-sameorigin.html
@@ -16,8 +16,8 @@ async_test(t => {
     assert_equals(e.formData, null, "formData");
     assert_equals(e.destination.url, link.href, "destination.url");
     assert_true(e.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.destination.key, null, "destination.key");
-    assert_equals(e.destination.id, null, "destination.id");
+    assert_equals(e.destination.key, "", "destination.key");
+    assert_equals(e.destination.id, "", "destination.id");
     assert_equals(e.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-crossdocument-crossorigin-sameorigindomain.sub.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-crossdocument-crossorigin-sameorigindomain.sub.html
index 77a5873c083..cee7d95b9ec 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-crossdocument-crossorigin-sameorigindomain.sub.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-crossdocument-crossorigin-sameorigindomain.sub.html
@@ -23,8 +23,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, iframe.src + "?foo", "destination.url");
       assert_false(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-crossdocument-sameorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-crossdocument-sameorigin.html
index 41ac1b03750..d0dad46b72a 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-crossdocument-sameorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-crossdocument-sameorigin.html
@@ -15,8 +15,8 @@ async_test(t => {
     assert_equals(e.formData, null, "formData");
     assert_equals(e.destination.url, i.src + "?foo", "destination.url");
     assert_false(e.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.destination.key, null, "destination.key");
-    assert_equals(e.destination.id, null, "destination.id");
+    assert_equals(e.destination.key, "", "destination.key");
+    assert_equals(e.destination.id, "", "destination.id");
     assert_equals(e.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-crossorigin-sameorigindomain.sub.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-crossorigin-sameorigindomain.sub.html
index 1eda74e9828..156d1cb3cfd 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-crossorigin-sameorigindomain.sub.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-crossorigin-sameorigindomain.sub.html
@@ -23,8 +23,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, iframe.src + "#foo", "destination.url");
       assert_true(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-crossorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-crossorigin.html
index 5679236a7dd..6d73262dea0 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-crossorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-crossorigin.html
@@ -21,8 +21,8 @@ async_test(t => {
     assert_equals(e.data.formData, null, "formData");
     assert_equals(e.data.destination.url, iframe.src + "#foo", "destination.url");
     assert_true(e.data.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.data.destination.key, null, "destination.key");
-    assert_equals(e.data.destination.id, null, "destination.id");
+    assert_equals(e.data.destination.key, "", "destination.key");
+    assert_equals(e.data.destination.id, "", "destination.id");
     assert_equals(e.data.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-sameorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-sameorigin.html
index a7e4181c3a1..6516a602395 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-sameorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/location-samedocument-sameorigin.html
@@ -15,8 +15,8 @@ async_test(t => {
     assert_equals(e.formData, null, "formData");
     assert_equals(e.destination.url, i.src + "#foo", "destination.url");
     assert_true(e.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.destination.key, null, "destination.key");
-    assert_equals(e.destination.id, null, "destination.id");
+    assert_equals(e.destination.key, "", "destination.key");
+    assert_equals(e.destination.id, "", "destination.id");
     assert_equals(e.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-crossdocument-crossorigin-sameorigindomain.sub.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-crossdocument-crossorigin-sameorigindomain.sub.html
index ea9ea479c34..1c411d98668 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-crossdocument-crossorigin-sameorigindomain.sub.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-crossdocument-crossorigin-sameorigindomain.sub.html
@@ -24,8 +24,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, url + "?foo", "destination.url");
       assert_false(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-crossdocument-sameorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-crossdocument-sameorigin.html
index 478483e238d..c91689341e8 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-crossdocument-sameorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-crossdocument-sameorigin.html
@@ -15,8 +15,8 @@ async_test(t => {
     assert_equals(e.formData, null, "formData");
     assert_equals(e.destination.url, i.src + "?foo", "destination.url");
     assert_false(e.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.destination.key, null, "destination.key");
-    assert_equals(e.destination.id, null, "destination.id");
+    assert_equals(e.destination.key, "", "destination.key");
+    assert_equals(e.destination.id, "", "destination.id");
     assert_equals(e.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-crossorigin-sameorigindomain.sub.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-crossorigin-sameorigindomain.sub.html
index 324adb32a45..74a6cae2461 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-crossorigin-sameorigindomain.sub.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-crossorigin-sameorigindomain.sub.html
@@ -24,8 +24,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, url + "#foo", "destination.url");
       assert_true(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-crossorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-crossorigin.html
index 23dceb04204..9b31744ba38 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-crossorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-crossorigin.html
@@ -22,8 +22,8 @@ async_test(t => {
     assert_equals(e.data.formData, null, "formData");
     assert_equals(e.data.destination.url, iframe.src + "#foo", "destination.url");
     assert_true(e.data.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.data.destination.key, null, "destination.key");
-    assert_equals(e.data.destination.id, null, "destination.id");
+    assert_equals(e.data.destination.key, "", "destination.key");
+    assert_equals(e.data.destination.id, "", "destination.id");
     assert_equals(e.data.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-sameorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-sameorigin.html
index 9ca85318034..c357072e09d 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-sameorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/open-samedocument-sameorigin.html
@@ -15,8 +15,8 @@ async_test(t => {
     assert_equals(e.formData, null, "formData");
     assert_equals(e.destination.url, i.src + "#foo", "destination.url");
     assert_true(e.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.destination.key, null, "destination.key");
-    assert_equals(e.destination.id, null, "destination.id");
+    assert_equals(e.destination.key, "", "destination.key");
+    assert_equals(e.destination.id, "", "destination.id");
     assert_equals(e.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-crossdocument-crossorigin-sameorigindomain.sub.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-crossdocument-crossorigin-sameorigindomain.sub.html
index f6110346174..ffdaac7ccdd 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-crossdocument-crossorigin-sameorigindomain.sub.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-crossdocument-crossorigin-sameorigindomain.sub.html
@@ -30,8 +30,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, form.action, "destination.url");
       assert_false(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-crossdocument-sameorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-crossdocument-sameorigin.html
index 05347335a19..b54a5a440b0 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-crossdocument-sameorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-crossdocument-sameorigin.html
@@ -16,8 +16,8 @@ async_test(t => {
     assert_equals(e.formData, null, "formData");
     assert_equals(e.destination.url, form.action, "destination.url");
     assert_false(e.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.destination.key, null, "destination.key");
-    assert_equals(e.destination.id, null, "destination.id");
+    assert_equals(e.destination.key, "", "destination.key");
+    assert_equals(e.destination.id, "", "destination.id");
     assert_equals(e.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-crossorigin-sameorigindomain.sub.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-crossorigin-sameorigindomain.sub.html
index 9e64a0124da..e9ab17243e5 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-crossorigin-sameorigindomain.sub.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-crossorigin-sameorigindomain.sub.html
@@ -30,8 +30,8 @@ async_test(t => {
       assert_equals(e.formData, null, "formData");
       assert_equals(e.destination.url, form.action, "destination.url");
       assert_true(e.destination.sameDocument, "destination.sameDocument");
-      assert_equals(e.destination.key, null, "destination.key");
-      assert_equals(e.destination.id, null, "destination.id");
+      assert_equals(e.destination.key, "", "destination.key");
+      assert_equals(e.destination.id, "", "destination.id");
       assert_equals(e.destination.index, -1, "destination.index");
     });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-crossorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-crossorigin.html
index e53a1f93e7a..69b12f27959 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-crossorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-crossorigin.html
@@ -28,8 +28,8 @@ async_test(t => {
     assert_equals(e.data.formData, null, "formData");
     assert_equals(e.data.destination.url, form.action, "destination.url");
     assert_true(e.data.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.data.destination.key, null, "destination.key");
-    assert_equals(e.data.destination.id, null, "destination.id");
+    assert_equals(e.data.destination.key, "", "destination.key");
+    assert_equals(e.data.destination.id, "", "destination.id");
     assert_equals(e.data.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-sameorigin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-sameorigin.html
index 43aa3226fcd..8a0e1f1fb69 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-sameorigin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/cross-window/submit-samedocument-sameorigin.html
@@ -16,8 +16,8 @@ async_test(t => {
     assert_equals(e.formData, null, "formData");
     assert_equals(e.destination.url, form.action, "destination.url");
     assert_true(e.destination.sameDocument, "destination.sameDocument");
-    assert_equals(e.destination.key, null, "destination.key");
-    assert_equals(e.destination.id, null, "destination.id");
+    assert_equals(e.destination.key, "", "destination.key");
+    assert_equals(e.destination.id, "", "destination.id");
     assert_equals(e.destination.index, -1, "destination.index");
   });
 
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-cross-origin.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-cross-origin.html
index d8f2e383124..ee099248507 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-cross-origin.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-cross-origin.html
@@ -14,8 +14,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(e.destination.url, "https://does-not-exist/foo.html");
     assert_false(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     e.preventDefault();
   });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-download-userInitiated.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-download-userInitiated.html
index 90a612b7588..b9506984dad 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-download-userInitiated.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-download-userInitiated.html
@@ -18,8 +18,8 @@ async_test(t => {
     assert_equals(e.formData, null);
     assert_equals(new URL(e.destination.url).search, "?1");
     assert_false(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     e.preventDefault();
     t.step_timeout(t.step_func_done(() => assert_equals(location.hash, "")), 0);
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-download.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-download.html
index c5ca306b790..05fb0ecf2fe 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-download.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-download.html
@@ -22,8 +22,8 @@ for (const [tag, download_attr] of tests) {
       assert_equals(new URL(e.destination.url).pathname,
                     "/navigation-api/navigate-event/foo.html");
       assert_false(e.destination.sameDocument);
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       e.preventDefault();
     });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-fragment.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-fragment.html
index b7706b7debe..51221ebcad3 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-fragment.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-fragment.html
@@ -14,8 +14,8 @@ async_test(t => {
     assert_equals(e.formData, null);
     assert_equals(new URL(e.destination.url).hash, "#1");
     assert_true(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     e.preventDefault();
     t.step_timeout(t.step_func_done(() => assert_equals(location.hash, "")), 0);
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-same-origin-cross-document.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-same-origin-cross-document.html
index b8e925a4dba..68f5bf0627c 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-same-origin-cross-document.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-same-origin-cross-document.html
@@ -15,8 +15,8 @@ async_test(t => {
     assert_equals(new URL(e.destination.url).pathname,
                   "/navigation-api/navigate-event/foo.html");
     assert_false(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     e.preventDefault();
   });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-userInitiated.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-userInitiated.html
index b746bbe3f02..39192c91513 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-userInitiated.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-userInitiated.html
@@ -17,8 +17,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(new URL(e.destination.url).hash, "#1");
     assert_true(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     e.preventDefault();
     t.step_timeout(t.step_func_done(() => assert_equals(location.hash, "")), 0);
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-with-target.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-with-target.html
index c2053a37b09..6407b963beb 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-with-target.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-anchor-with-target.html
@@ -20,8 +20,8 @@ async_test(t => {
       assert_equals(new URL(e.destination.url).pathname,
                     "/navigation-api/navigate-event/foo.html");
       assert_false(e.destination.sameDocument);
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       e.preventDefault();
     });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-after-detach.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-after-detach.html
new file mode 100644
index 00000000000..1dcb6cac437
--- /dev/null
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-after-detach.html
@@ -0,0 +1,33 @@
+<!doctype html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<iframe id="i" src="/common/blank.html"></iframe>
+<script>
+promise_test(async t => {
+  // Wait for after the load event so that the navigation doesn't get converted
+  // into a replace navigation.
+  await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));
+
+  let destination_key = i.contentWindow.navigation.currentEntry.key;
+  let destination_id = i.contentWindow.navigation.currentEntry.id;
+  let destination_index = i.contentWindow.navigation.currentEntry.index;
+  await i.contentWindow.navigation.navigate("#1").finished;
+
+  let back_destination;
+  i.contentWindow.navigation.onnavigate = e => back_destination = e.destination;
+  await i.contentWindow.navigation.back().finished;
+
+  // Before detach, key/id/index are valid.
+  assert_equals(back_destination.key, destination_key);
+  assert_equals(back_destination.id, destination_id);
+  assert_equals(back_destination.index, destination_index);
+
+  i.remove();
+
+  // After detach, key/id/index are invalid, but the url is still valid.
+  assert_equals(back_destination.key, "");
+  assert_equals(back_destination.id, "");
+  assert_equals(new URL(back_destination.url).pathname, "/common/blank.html");
+  assert_equals(back_destination.index, -1);
+}, "navigate event destination after iframe detach");
+</script>
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-dynamic-index.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-dynamic-index.html
new file mode 100644
index 00000000000..2e0f1ea4973
--- /dev/null
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-dynamic-index.html
@@ -0,0 +1,34 @@
+<!doctype html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../navigation-methods/return-value/resources/helpers.js"></script>
+<script>
+promise_test(async t => {
+  // Wait for after the load event so that the navigation doesn't get converted
+  // into a replace navigation.
+  await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));
+  await navigation.navigate("#1").finished;
+
+  let back_destination;
+  navigation.addEventListener("navigate", t.step_func(e => {
+    back_destination = e.destination;
+    assert_equals(back_destination.index, 0);
+  }), { once: true });
+  await navigation.back().finished;
+
+  // Disposing the destination entry of back_destination should update
+  // back_destination.index, even though back_destination's navigation has
+  // completed.
+  await navigation.navigate("#clobber_back", { history: "replace" }).finished;
+  assert_equals(back_destination.index, -1);
+
+  navigation.addEventListener("navigate", t.step_func(e => {
+    assert_equals(e.destination.index, 1);
+
+    // Dispose the destination entry and destination.index should update.
+    navigation.navigate("#clobber_forward");
+    assert_equals(e.destination.index, -1);
+  }), { once: true });
+  await assertBothRejectDOM(t, navigation.forward(), "AbortError");
+}, "navigate event destination.index should be dynamic");
+</script>
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-back-forward.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-back-forward.html
index c118aa7a1f3..c8b1043aba6 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-back-forward.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-back-forward.html
@@ -16,8 +16,8 @@ async_test(t => {
       assert_not_equals(e.destination, null);
       assert_not_equals(e.destination.getState(), undefined);
       assert_not_equals(e.destination.getState(), e.destination.getState());
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
     });
     navigation.back();
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-navigate.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-navigate.html
index 9c34c5753a1..5dac40de566 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-navigate.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-navigate.html
@@ -13,8 +13,8 @@ async_test(t => {
       assert_not_equals(e.destination.getState(), undefined);
       assert_equals(e.destination.getState().statevar, "state");
       assert_not_equals(e.destination.getState(), e.destination.getState());
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
     });
     navigation.navigate("#foo", { state: navState });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-reload.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-reload.html
index b3afb72482c..a180e086a94 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-reload.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-destination-getState-reload.html
@@ -13,8 +13,8 @@ async_test(t => {
       assert_not_equals(e.destination.getState(), undefined);
       assert_equals(e.destination.getState().statevar, "state");
       assert_not_equals(e.destination.getState(), e.destination.getState());
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       e.intercept();
     });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-get.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-get.html
index 69a49eb08a6..87a102ddc05 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-get.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-get.html
@@ -15,8 +15,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(e.destination.url, location.href + "?");
     assert_false(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
 
     // Because it's a GET, not a POST
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-userInitiated.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-userInitiated.html
index 454f0773962..40c5905447c 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-userInitiated.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-userInitiated.html
@@ -20,8 +20,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(e.destination.url, location.href);
     assert_false(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     assert_not_equals(e.formData, null);
   });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-with-target.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-with-target.html
index b23ab3a70cc..f6fe05c938f 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-with-target.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form-with-target.html
@@ -18,8 +18,8 @@ async_test(t => {
       assert_equals(new URL(e.destination.url).pathname,
                     "/navigation-api/navigate-event/foo.html");
       assert_false(e.destination.sameDocument);
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       assert_not_equals(e.formData, null);
     });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form.html
index b537a9b58f0..c57d72c3deb 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-form.html
@@ -15,8 +15,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(e.destination.url, location.href);
     assert_false(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     assert_not_equals(e.formData, null);
   });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-go-0.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-go-0.html
index 96d98cf44c8..b1f41425b62 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-go-0.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-go-0.html
@@ -14,8 +14,8 @@ async_test(t => {
       assert_equals(e.downloadRequest, null);
       assert_equals(new URL(e.destination.url).pathname, "/common/blank.html");
       assert_false(e.destination.sameDocument);
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       assert_equals(e.formData, null);
       e.preventDefault();
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-pushState.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-pushState.html
index 2f8c81c7090..266309a79e1 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-pushState.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-pushState.html
@@ -13,8 +13,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(new URL(e.destination.url).hash, "#1");
     assert_true(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     assert_equals(e.formData, null);
     e.preventDefault();
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-replaceState.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-replaceState.html
index d8417fbfd30..ea6d3df455d 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-replaceState.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-history-replaceState.html
@@ -13,8 +13,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(new URL(e.destination.url).hash, "#1");
     assert_true(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     assert_equals(e.formData, null);
     e.preventDefault();
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-iframe-location.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-iframe-location.html
index 059b9950118..25d51476f3f 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-iframe-location.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-iframe-location.html
@@ -17,8 +17,8 @@ async_test(t => {
       assert_equals(e.downloadRequest, null);
       assert_equals(new URL(e.destination.url).hash, "#1");
       assert_true(e.destination.sameDocument);
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       assert_equals(e.formData, null);
       e.preventDefault();
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-location.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-location.html
index c5aa0be97a4..a4d0c60776d 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-location.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-location.html
@@ -13,8 +13,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(new URL(e.destination.url).hash, "#1");
     assert_true(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     assert_equals(e.formData, null);
   });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-meta-refresh.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-meta-refresh.html
index 1f8ed306851..9fa59b29f24 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-meta-refresh.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-meta-refresh.html
@@ -16,8 +16,8 @@ async_test(t => {
       assert_equals(e.downloadRequest, null);
       assert_equals(e.destination.url, i.contentWindow.location.href);
       assert_false(e.destination.sameDocument);
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       assert_equals(e.formData, null);
       e.preventDefault();
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-navigation-navigate.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-navigation-navigate.html
index 76f98c72361..ffc8ea867f7 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-navigation-navigate.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-navigation-navigate.html
@@ -12,8 +12,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(new URL(e.destination.url).hash, "#foo");
     assert_true(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     assert_equals(e.formData, null);
   });
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-to-srcdoc.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-to-srcdoc.html
index 26ad135b6ad..8bbb66a31fd 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-to-srcdoc.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-to-srcdoc.html
@@ -17,8 +17,8 @@ async_test(t => {
       assert_equals(e.downloadRequest, null);
       assert_equals(e.destination.url, "about:srcdoc");
       assert_false(e.destination.sameDocument);
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       assert_equals(e.formData, null);
       e.preventDefault();
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-window-open-self.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-window-open-self.html
index 274c8bc4d57..a6e443fd5a1 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-window-open-self.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-window-open-self.html
@@ -12,8 +12,8 @@ async_test(t => {
     assert_equals(e.downloadRequest, null);
     assert_equals(new URL(e.destination.url).hash, "#1");
     assert_true(e.destination.sameDocument);
-    assert_equals(e.destination.key, null);
-    assert_equals(e.destination.id, null);
+    assert_equals(e.destination.key, "");
+    assert_equals(e.destination.id, "");
     assert_equals(e.destination.index, -1);
     assert_equals(e.formData, null);
     e.preventDefault();
diff --git a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-window-open.html b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-window-open.html
index afc998271f6..1fe2402bc91 100644
--- a/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-window-open.html
+++ b/tests/wpt/web-platform-tests/navigation-api/navigate-event/navigate-window-open.html
@@ -17,8 +17,8 @@ async_test(t => {
       assert_equals(e.downloadRequest, null);
       assert_equals(new URL(e.destination.url).hash, "#1");
       assert_true(e.destination.sameDocument);
-      assert_equals(e.destination.key, null);
-      assert_equals(e.destination.id, null);
+      assert_equals(e.destination.key, "");
+      assert_equals(e.destination.id, "");
       assert_equals(e.destination.index, -1);
       assert_equals(e.formData, null);
       e.preventDefault();
diff --git a/tests/wpt/web-platform-tests/page-visibility/resources/window_state_context.js b/tests/wpt/web-platform-tests/page-visibility/resources/window_state_context.js
index 40f10a56448..fa96bf3b760 100644
--- a/tests/wpt/web-platform-tests/page-visibility/resources/window_state_context.js
+++ b/tests/wpt/web-platform-tests/page-visibility/resources/window_state_context.js
@@ -15,5 +15,23 @@ function window_state_context(t) {
         rect = await test_driver.minimize_window();
     }
 
-    return {minimize, restore};
+    function visibilityEventPromise() {
+      return new Promise(resolve => new PerformanceObserver(
+        (entries, observer) => { observer.disconnect(); resolve(); }).observe(
+          {type: "visibility-state"}))
+    }
+
+    async function minimizeAndWait() {
+      const promise = visibilityEventPromise();
+      await Promise.all([minimize(), promise]);
+      await new Promise(resolve => t.step_timeout(resolve, 0));
+    }
+
+    async function restoreAndWait() {
+      const promise = visibilityEventPromise();
+      await Promise.all([restore(), promise]);
+      await new Promise(resolve => t.step_timeout(resolve, 0));
+    }
+
+    return {minimize, restore, minimizeAndWait, restoreAndWait};
 }
diff --git a/tests/wpt/web-platform-tests/page-visibility/visibility-state-entry.tentative.html b/tests/wpt/web-platform-tests/page-visibility/visibility-state-entry.tentative.html
index c62b6c583f4..0dbe634d25b 100644
--- a/tests/wpt/web-platform-tests/page-visibility/visibility-state-entry.tentative.html
+++ b/tests/wpt/web-platform-tests/page-visibility/visibility-state-entry.tentative.html
@@ -1,6 +1,6 @@
 <!DOCTYPE HTML>
 <title>Test VisibleStateEntry</title>
-<link rel="author" title="Noam Rosenthal"  href="mailto:noam@chromium.org">
+<link rel="author" title="Noam Rosenthal"  href="mailto:nrosenthal@chromium.org">
 <link rel="help" href="https://html.spec.whatwg.org/multipage/interaction.html#page-visibility">
 <meta name="timeout" content="long">
 <script src="/resources/testharness.js"></script>
@@ -15,68 +15,56 @@ setup(() => {
 });
 
 promise_test(async t => {
-    const {minimize, restore} = window_state_context(t);
+    const {minimizeAndWait, restoreAndWait} = window_state_context(t);
+    const all = performance.getEntries();
     let entries = performance.getEntriesByType("visibility-state");
     assert_equals(entries.length, 1);
     assert_equals(entries[0].name, "visible");
     assert_equals(entries[0].startTime, 0);
     assert_equals(entries[0].duration, 0);
-    await minimize();
+    await minimizeAndWait();
     entries = performance.getEntriesByType("visibility-state");
     assert_equals(entries.length, 2);
     assert_equals(entries[1].name, "hidden");
     assert_equals(entries[1].duration, 0);
-    await restore();
+    await restoreAndWait();
+    entries = performance.getEntriesByType("visibility-state");
     assert_equals(entries.length, 3);
     assert_equals(entries[2].name, "visible");
     assert_equals(entries[2].duration, 0);
 }, "Hiding/showing the page should create visibility-state entries");
 
 promise_test(async t => {
-    const {minimize, restore} = window_state_context(t);
-    await minimize();
-    const popup = window.open("resources/blank_page_green.html");
-    t.add_cleanup(() => popup.close());
-    await restore();
-    let entries = popup.performance.getEntriesByType("visibility-state");
-    assert_equals(entries.length, 2);
+    const {minimizeAndWait} = window_state_context(t);
+    await minimizeAndWait();
+    const iframe = document.createElement("iframe");
+    iframe.src = "resources/blank_page_green.html";
+    const loaded = new Promise(resolve => iframe.addEventListener("load", resolve));
+    t.add_cleanup(() => iframe.remove());
+    document.body.appendChild(iframe);
+    await loaded;
+    const entries = iframe.contentWindow.performance.getEntriesByType("visibility-state");
     assert_equals(entries[0].name, "hidden");
     assert_equals(entries[0].startTime, 0);
-    assert_equals(entries[1].name, "visible");
-    assert_greater_than(entries[1].startTime, 0);
-
 }, "If a page starts as hidden, the first visibility-state entry should be hidden");
 
 promise_test(async t => {
     const {minimize, restore} = window_state_context(t);
-    await minimize();
     const observed = new Promise(resolve => new PerformanceObserver(list => {
-        const entries = list.getEntries();
-        assert_equals(entries.length, 1);
-        assert_equals(entries[0].name, "visible");
-        assert_greater_than(entries[0].startTime, 0);
-        assert_equals(entries[0].duration, 0);
+      if (list.getEntries()[0].name === "visible")
         resolve();
-    }).observe({entryTypes: ['visibility-state'], buffered: true}));
+    }).observe({entryTypes: ['visibility-state']}));
+    await minimize();
     await restore();
     await observed;
 }, "Visibility state entries should be queued to performance observers");
 
 promise_test(async t => {
-    const {minimize, restore} = window_state_context(t);
-    await minimize();
-    await restore();
-    await new Promise(resolve => new PerformanceObserver(list => {
-        const entries = list.getEntries();
-        assert_equals(entries.length, 3);
-        assert_equals(entries[0].name, "visible");
-        assert_equals(entries[0].startTime, 0);
-        assert_equals(entries[0].duration, 0);
-        assert_equals(entries[1].name, "hidden");
-        assert_equals(entries[1].duration, 0);
-        assert_equals(entries[2].name, "visible");
-        assert_equals(entries[2].duration, 0);
-        resolve();
-    }).observe({entryTypes: ['visibility-state'], buffered: true}));
-}, "Visibility state entries should respect the buffered flag");
+    const entry = await new Promise(resolve => new PerformanceObserver(
+      (list, observer) => {
+        observer.disconnect();
+        resolve(list.getEntries()[0]);
+      }).observe({type: "visibility-state", buffered: true}));
+    assert_equals(entry.name, "visible");
+}, "Visibility state observers should respect the buffered flag");
 </script>
diff --git a/tests/wpt/web-platform-tests/resources/chromium/mock-pressure-service.js b/tests/wpt/web-platform-tests/resources/chromium/mock-pressure-service.js
index 91efe529f2a..21811ed52da 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/mock-pressure-service.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/mock-pressure-service.js
@@ -1,5 +1,5 @@
 import {PressureManager, PressureManagerReceiver, PressureStatus} from '/gen/services/device/public/mojom/pressure_manager.mojom.m.js'
-import {PressureFactor, PressureState} from '/gen/services/device/public/mojom/pressure_update.mojom.m.js'
+import {PressureFactor, PressureSource, PressureState} from '/gen/services/device/public/mojom/pressure_update.mojom.m.js'
 
 class MockPressureService {
   constructor() {
@@ -9,11 +9,8 @@ class MockPressureService {
     this.interceptor_.oninterfacerequest = e => {
       this.receiver_.$.bindHandle(e.handle);
     };
-    this.receiver_.onConnectionError.addListener(() => {
-      this.stopPlatformCollector();
-      this.observer_ = null;
-    });
     this.reset();
+    this.mojomSourceType_ = new Map([['cpu', PressureSource.kCpu]]);
     this.mojomStateType_ = new Map([
       ['nominal', PressureState.kNominal], ['fair', PressureState.kFair],
       ['serious', PressureState.kSerious], ['critical', PressureState.kCritical]
@@ -40,22 +37,27 @@ class MockPressureService {
   }
 
   reset() {
-    this.observer_ = null;
+    this.observers_ = [];
     this.pressureUpdate_ = null;
     this.pressureServiceReadingTimerId_ = null;
     this.pressureStatus_ = PressureStatus.kOk;
     this.updatesDelivered_ = 0;
   }
 
-  async addClient(observer) {
-    if (this.observer_ !== null)
-      throw new Error('BindObserver() has already been called');
+  async addClient(observer, source) {
+    if (this.observers_.indexOf(observer) >= 0)
+      throw new Error('addClient() has already been called');
 
-    this.observer_ = observer;
-    this.observer_.onConnectionError.addListener(() => {
-      this.stopPlatformCollector();
-      this.observer_ = null;
+    // TODO(crbug.com/1342184): Consider other sources.
+    // For now, "cpu" is the only source.
+    if (source !== PressureSource.kCpu)
+      throw new Error('Call addClient() with a wrong PressureSource');
+
+    observer.onConnectionError.addListener(() => {
+      // Remove this observer from observer array.
+      this.observers_.splice(this.observers_.indexOf(observer), 1);
     });
+    this.observers_.push(observer);
 
     return {status: this.pressureStatus_};
   }
@@ -83,20 +85,21 @@ class MockPressureService {
     const epochDeltaInMs = unixEpoch - windowsEpoch;
 
     const timeout = (1 / sampleRate) * 1000;
-    this.pressureServiceReadingTimerId_ = window.setInterval(() => {
-      if (this.pressureUpdate_ === null || this.observer_ === null)
+    this.pressureServiceReadingTimerId_ = self.setInterval(() => {
+      if (this.pressureUpdate_ === null || this.observers_.length === 0)
         return;
       this.pressureUpdate_.timestamp = {
         internalValue: BigInt((new Date().getTime() + epochDeltaInMs) * 1000)
       };
-      this.observer_.onPressureUpdated(this.pressureUpdate_);
+      for (let observer of this.observers_)
+        observer.onPressureUpdated(this.pressureUpdate_);
       this.updatesDelivered_++;
     }, timeout);
   }
 
   stopPlatformCollector() {
     if (this.pressureServiceReadingTimerId_ != null) {
-      window.clearInterval(this.pressureServiceReadingTimerId_);
+      self.clearInterval(this.pressureServiceReadingTimerId_);
       this.pressureServiceReadingTimerId_ = null;
     }
     this.updatesDelivered_ = 0;
@@ -106,7 +109,10 @@ class MockPressureService {
     return this.updatesDelivered_;
   }
 
-  setPressureUpdate(state, factors) {
+  setPressureUpdate(source, state, factors) {
+    if (!this.mojomSourceType_.has(source))
+      throw new Error(`PressureSource '${source}' is invalid`);
+
     if (!this.mojomStateType_.has(state))
       throw new Error(`PressureState '${state}' is invalid`);
 
@@ -120,6 +126,7 @@ class MockPressureService {
     }
 
     this.pressureUpdate_ = {
+      source: this.mojomSourceType_.get(source),
       state: this.mojomStateType_.get(state),
       factors: pressureFactors,
     };
diff --git a/tests/wpt/web-platform-tests/resources/chromium/mock-subapps.js b/tests/wpt/web-platform-tests/resources/chromium/mock-subapps.js
index b63e97b8c4d..b81936713b1 100644
--- a/tests/wpt/web-platform-tests/resources/chromium/mock-subapps.js
+++ b/tests/wpt/web-platform-tests/resources/chromium/mock-subapps.js
@@ -37,7 +37,7 @@ self.SubAppsServiceTest = (() => {
 
     remove() {
       return Promise.resolve({
-        result: testInternal.serviceResultCode,
+        result: testInternal.removeCallReturnValue,
       });
     }
   }
@@ -48,6 +48,7 @@ self.SubAppsServiceTest = (() => {
     serviceResultCode: 0,
     addCallReturnValue: [],
     listCallReturnValue: [],
+    removeCallReturnValue: [],
   }
 
   class SubAppsServiceTestChromium {
@@ -55,7 +56,7 @@ self.SubAppsServiceTest = (() => {
       Object.freeze(this);  // Make it immutable.
     }
 
-    initialize(service_result_code, add_call_return_value, list_call_return_value) {
+    initialize(service_result_code, add_call_return_value, list_call_return_value, remove_call_return_value) {
       if (!testInternal.initialized) {
         testInternal = {
           mockSubAppsService: new MockSubAppsService(),
@@ -63,6 +64,7 @@ self.SubAppsServiceTest = (() => {
           serviceResultCode: service_result_code,
           addCallReturnValue: add_call_return_value,
           listCallReturnValue: list_call_return_value,
+          removeCallReturnValue: remove_call_return_value,
         };
       };
     }
@@ -76,6 +78,7 @@ self.SubAppsServiceTest = (() => {
           serviceResultCode: 0,
           addCallReturnValue: [],
           listCallReturnValue: [],
+          removeCallReturnValue: [],
         };
         await new Promise(resolve => setTimeout(resolve, 0));
       }
diff --git a/tests/wpt/web-platform-tests/screen-orientation/orientation-reading.html b/tests/wpt/web-platform-tests/screen-orientation/orientation-reading.html
index 0bebb6723a3..90bbb8071da 100644
--- a/tests/wpt/web-platform-tests/screen-orientation/orientation-reading.html
+++ b/tests/wpt/web-platform-tests/screen-orientation/orientation-reading.html
@@ -6,110 +6,91 @@
 <script src="/resources/testdriver.js"></script>
 <script src="/resources/testdriver-vendor.js"></script>
 <script type="module">
-
-import { makeCleanup, getOppositeOrientation } from "./resources/orientation-utils.js";
+"use strict";
+import {
+  makeCleanup,
+  getOppositeOrientation,
+} from "./resources/orientation-utils.js";
 
 test(() => {
-  assert_true("type" in screen.orientation);
-  assert_true("angle" in screen.orientation);
-}, "Test screen.orientation properties");
+  assert_true("type" in screen.orientation, ".type must be present");
+  assert_true("angle" in screen.orientation, ".angle must be present");
+}, "screen.orientation attributes are present");
 
-test(() => {
-  const type = screen.orientation.type;
-  const angle = screen.orientation.angle;
-
-  if (screen.width > screen.height) {
-    assert_true(type == "landscape-primary" || type == "landscape-secondary");
-  } else if (screen.width < screen.height) {
-    assert_true(type == "portrait-primary" || type == "portrait-secondary");
+async function testExpectedOrientationAngles(expectedAngles) {
+  for (const [orientation, expectedAngle] of Object.entries(expectedAngles)) {
+    try {
+      if (screen.orientation.type !== orientation) {
+        await screen.orientation.lock(orientation);
+      }
+      assert_equals(
+        screen.orientation.angle,
+        expectedAngle,
+        `Orientation angle for '${orientation}' must be ${expectedAngle} degrees`
+      );
+    } catch (err) {
+      // implementation might not support locking to this orientation
+    }
   }
+}
 
-  assert_true(angle == 0 || angle == 90 || angle == 180 || angle == 270);
-}, "Test screen.orientation default values.");
-
-promise_test(async t => {
+promise_test(async (t) => {
   t.add_cleanup(makeCleanup());
   await test_driver.bless("request full screen");
   await document.documentElement.requestFullscreen();
-  try {
-    await screen.orientation.lock("portrait-primary");
-  } catch (err) {
-    // implementation might not support locking to portrait-primary
-    return;
-  }
-  const orientations =
-    screen.orientation.angle === 0
-      ? {
-          secondaryOrientation1: "portrait-secondary",
-          primaryOrientation2: "landscape-primary",
-          secondaryOrientation2: "landscape-secondary",
-        }
-      : {
-          secondaryOrientation1: "landscape-secondary",
-          primaryOrientation2: "portrait-primary",
-          secondaryOrientation2: "portrait-secondary",
-        };
-  try {
-    await screen.orientation.lock(orientations.secondaryOrientation1);
-  } catch (err) {
-    // implementation might not support locking to this orientation
-    return;
-  }
-  assert_equals(
-    screen.orientation.angle,
-    180,
-    "Secondary orientation 1 angle must be 180"
-  );
-  try {
-    await screen.orientation.lock(orientations.primaryOrientation2);
-  } catch (err) {
-    // implementation might not support locking to this orientation
-    return;
-  }
-  assert_true(
-    screen.orientation.angle == 90 || screen.orientation.angle == 270,
-    "Primary orientation 2 angle must be either 90 or 270"
-  );
-  const primaryOrientation2Angle = screen.orientation.angle;
-  const secondaryOrientation2Angle = primaryOrientation2Angle === 90 ? 270 : 90;
-  try {
-    await screen.orientation.lock(orientations.secondaryOrientation2);
-  } catch (err) {
-    // implementation might not support locking to this orientation
-    return;
-  }
-  assert_equals(
-    screen.orientation.angle,
-    secondaryOrientation2Angle,
-    "Secondary orientation 2 angle must be the opposite angle to primary orientation 2"
-  );
-  screen.orientation.unlock();
-}, "Test the orientations and associated angles");
+
+  const expectedAnglesPortrait = {
+    "portrait-primary": 0,
+    "landscape-primary": 90,
+    "portrait-secondary": 180,
+    "landscape-secondary": 270,
+  };
+
+  await testExpectedOrientationAngles(expectedAnglesPortrait);
+}, "Test the orientations and associated angles when the natural orientation is 'portrait'");
+
+promise_test(async (t) => {
+  t.add_cleanup(makeCleanup());
+  await test_driver.bless("request full screen");
+  await document.documentElement.requestFullscreen();
+
+  const expectedAnglesLandscape = {
+    "landscape-primary": 0,
+    "portrait-primary": 90,
+    "landscape-secondary": 180,
+    "portrait-secondary": 270,
+  };
+
+  await testExpectedOrientationAngles(expectedAnglesLandscape);
+}, "Test the orientations and associated angles when the natural orientation is 'landscape'");
 
 test(() => {
-  const type = screen.orientation.type;
-  const angle = screen.orientation.angle;
+  const { angle, type } = screen.orientation;
 
-  try {
-    screen.orientation.type = "foo";
-  } catch (err) {
-    // implementation might throw an exception due to readonly
-  }
-  try {
-    screen.orientation.angle = 42;
-  } catch (err) {
-    // implementation might throw an exception due to readonly
-  }
+  assert_throws_js(
+    TypeError,
+    () => {
+      screen.orientation.type = "foo";
+    },
+    "throws when setting ScreenOrientation.type to a string in strict mode"
+  );
+  assert_throws_js(
+    TypeError,
+    () => {
+      screen.orientation.angle = 42;
+    },
+    "throws when setting ScreenOrientation.angle to a number in strict mode"
+  );
 
   assert_equals(screen.orientation.type, type);
   assert_equals(screen.orientation.angle, angle);
-}, "Test that screen.orientation properties are not writable");
+}, "Test that ScreenOrientation properties are not writable");
 
 test(() => {
   assert_equals(screen.orientation, screen.orientation);
-}, "Test that screen.orientation is always the same object");
+}, "Test that ScreenOrientation is always the same object");
 
-promise_test(async t => {
+promise_test(async (t) => {
   t.add_cleanup(makeCleanup());
   await test_driver.bless("request full screen");
   await document.documentElement.requestFullscreen();
@@ -121,10 +102,18 @@ promise_test(async t => {
   // change event is fired before resolving promise by lock.
   const event = await Promise.race([
     orientationWatcher.wait_for("change"),
-    screen.orientation.lock(newOrientationType)
+    screen.orientation.lock(newOrientationType),
   ]);
   assert_true(event instanceof Event, "expected event");
-  assert_not_equals(screen.orientation.type, initialType, "type should have changed");
-  assert_not_equals(screen.orientation.angle, initialAngle, "angle should have changed");
-}, "Test that screen.orientation values change if the orientation changes");
+  assert_not_equals(
+    screen.orientation.type,
+    initialType,
+    ".type must change"
+  );
+  assert_not_equals(
+    screen.orientation.angle,
+    initialAngle,
+    ".angle must change"
+  );
+}, "Test that ScreenOrientation's attribute values change after 'change' event fires");
 </script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/animation-duration-auto.tentative.html b/tests/wpt/web-platform-tests/scroll-animations/css/animation-duration-auto.tentative.html
index f44a682890d..375489c26a4 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/animation-duration-auto.tentative.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/animation-duration-auto.tentative.html
@@ -13,7 +13,7 @@
     width: 100px;
     height: 100px;
   }
-  #scroller > div {
+  #scroller > #content {
     height: 200px;
     width: 200px;
   }
@@ -36,9 +36,9 @@
 </style>
 <main>
   <div id=scroller>
-    <div></div>
+    <div id=content></div>
+    <div id=element></div>
   </div>
-  <div id=element></div>
 </main>
 <script>
   promise_test(async (t) => {
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/printing/scroll-timeline-specified-scroller-print.html b/tests/wpt/web-platform-tests/scroll-animations/css/printing/scroll-timeline-specified-scroller-print.html
index 7e5b6607b6e..05fab3e46ad 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/printing/scroll-timeline-specified-scroller-print.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/printing/scroll-timeline-specified-scroller-print.html
@@ -41,8 +41,8 @@
 
 <div id="scroller">
   <div id="contents"></div>
+  <div id="box"></div>
 </div>
-<div id="box"></div>
 
 <script>
   window.addEventListener('load', function() {
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/printing/scroll-timeline-specified-scroller-ref.html b/tests/wpt/web-platform-tests/scroll-animations/css/printing/scroll-timeline-specified-scroller-ref.html
index 9074f2454b1..d2f2d8f73d7 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/printing/scroll-timeline-specified-scroller-ref.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/printing/scroll-timeline-specified-scroller-ref.html
@@ -23,8 +23,8 @@
 
 <div id="scroller">
   <div id="contents"></div>
+  <div id="box"></div>
 </div>
-<div id="box"></div>
 
 <script>
   window.addEventListener('load', function() {
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/progress-based-animation-timeline.html b/tests/wpt/web-platform-tests/scroll-animations/css/progress-based-animation-timeline.html
index 2e910cbe51e..3f1aeed0ae9 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/progress-based-animation-timeline.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/progress-based-animation-timeline.html
@@ -28,6 +28,7 @@
     animation-duration: 10s;
     animation-timing-function: linear;
     animation-timeline: top_timeline;
+    position: absolute;
   }
   /* Ensure stable expectations if feature is not supported */
   @supports not (animation-timeline:foo) {
@@ -35,8 +36,10 @@
   }
 </style>
 <main>
-  <div id=scroller1><div></div></div>
-  <div id=element></div>
+  <div id=scroller1>
+    <div></div>
+    <div id=element></div>
+  </div>
 </main>
 <script>
   window.onload = async () => {
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/scroll-timeline-attachment.html b/tests/wpt/web-platform-tests/scroll-animations/css/scroll-timeline-attachment.html
new file mode 100644
index 00000000000..78ca2574373
--- /dev/null
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/scroll-timeline-attachment.html
@@ -0,0 +1,296 @@
+<!DOCTYPE html>
+<title>Scroll Timeline Attachment</title>
+<link rel="help" src="https://github.com/w3c/csswg-drafts/issues/7759">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/web-animations/testcommon.js"></script>
+
+<main id=main></main>
+<script>
+  function inflate(t, template) {
+    t.add_cleanup(() => main.replaceChildren());
+    main.append(template.content.cloneNode(true));
+    main.offsetTop;
+  }
+
+  async function scrollTop(e, value) {
+    e.scrollTop = value;
+    await waitForNextFrame();
+  }
+</script>
+<style>
+  @keyframes anim {
+    from { width: 0px; --applied:true; }
+    to { width: 200px; --applied:true; }
+  }
+
+  .scroller {
+    overflow-y: hidden;
+    width: 200px;
+    height: 200px;
+  }
+  .scroller > .content {
+    margin: 400px 0px;
+    width: 100px;
+    height: 100px;
+    background-color: green;
+  }
+  .target {
+    background-color: coral;
+    width: 0px;
+    animation: anim auto linear;
+    animation-timeline: t1;
+  }
+  .timeline {
+    scroll-timeline-name: t1;
+  }
+  .local {
+    scroll-timeline-attachment: local;
+  }
+  .defer {
+    scroll-timeline-attachment: defer;
+  }
+  .ancestor {
+    scroll-timeline-attachment: ancestor;
+  }
+
+</style>
+
+
+<!-- Basic Behavior -->
+
+<template id=scroll_timeline_defer>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class="scroller timeline ancestor">
+      <div class=content></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_defer);
+    let scroller = main.querySelector('.scroller');
+    let target = main.querySelector('.target');
+    await scrollTop(scroller, 350); // 50%
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+  }, 'Descendant can attach to deferred timeline');
+</script>
+
+<template id=scroll_timeline_defer_no_attach>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class="scroller timeline">
+      <div class=content></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_defer_no_attach);
+    let scroller = main.querySelector('.scroller');
+    let target = main.querySelector('.target');
+    await scrollTop(scroller, 350); // 50%
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+  }, 'Deferred timeline with no attachments');
+</script>
+
+<template id=scroll_timeline_local_ancestor>
+  <div class="scroller timeline local">
+    <div class=content>
+      <div class=target>Test</div>
+      <div class="scroller timeline ancestor">
+        <div class=content></div>
+      </div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_local_ancestor);
+    let scroller = main.querySelector('.scroller');
+    let target = main.querySelector('.target');
+    await scrollTop(scroller, 350); // 50%
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+  }, 'Timeline with ancestor attachment does not attach to local');
+</script>
+
+<template id=scroll_timeline_defer_two_attachments>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class="scroller timeline ancestor">
+      <div class=content></div>
+    </div>
+    <!-- Extra attachment -->
+    <div class="timeline ancestor"></div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_defer_two_attachments);
+    let scroller = main.querySelector('.scroller');
+    let target = main.querySelector('.target');
+    await scrollTop(scroller, 350); // 50%
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+  }, 'Deferred timeline with two attachments');
+</script>
+
+<!-- Effective Axis of ScrollTimeline -->
+
+<template id=scroll_timeline_defer_axis>
+  <div class="timeline defer" style="scroll-timeline-axis:inline">
+    <div class=target>Test</div>
+    <div class="scroller timeline ancestor" style="scroll-timeline-axis:vertical">
+      <div class=content></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_defer_axis);
+    let target = main.querySelector('.target');
+    assert_equals(target.getAnimations().length, 1);
+    let anim = target.getAnimations()[0];
+    assert_not_equals(anim.timeline, null);
+    assert_equals(anim.timeline.axis, 'vertical');
+  }, 'Axis of deferred timeline is taken from attached timeline');
+</script>
+
+
+<template id=scroll_timeline_defer_axis_multiple>
+  <div class="timeline defer" style="scroll-timeline-axis:inline">
+    <div class=target>Test</div>
+    <div class="scroller timeline ancestor" style="scroll-timeline-axis:vertical">
+      <div class=content></div>
+    </div>
+    <!-- Extra attachment -->
+    <div class="timeline ancestor"></div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_defer_axis_multiple);
+    let target = main.querySelector('.target');
+    assert_equals(target.getAnimations().length, 1);
+    let anim = target.getAnimations()[0];
+    assert_not_equals(anim.timeline, null);
+    assert_equals(anim.timeline.axis, 'block');
+  }, 'Axis of deferred timeline with multiple attachments');
+</script>
+
+
+<!-- Dynamic Reattachment -->
+
+
+<template id=scroll_timeline_reattach>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class="scroller timeline ancestor">
+      <div class=content></div>
+    </div>
+    <div class="scroller timeline">
+      <div class=content></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_reattach);
+    let scrollers = main.querySelectorAll('.scroller');
+    assert_equals(scrollers.length, 2);
+    let target = main.querySelector('.target');
+    await scrollTop(scrollers[0], 350); // 50%
+    await scrollTop(scrollers[1], 175); // 25%
+
+    // Attached to scrollers[0].
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+
+    // Reattach to scrollers[1].
+    scrollers[0].classList.remove('ancestor');
+    scrollers[1].classList.add('ancestor');
+
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '50px'); // 0px => 200px, 25%
+  }, 'Dynamically re-attaching');
+</script>
+
+
+<template id=scroll_timeline_dynamic_attach_second>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class="scroller timeline">
+      <div class=content></div>
+    </div>
+    <div class="scroller timeline">
+      <div class=content></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_dynamic_attach_second);
+    let scrollers = main.querySelectorAll('.scroller');
+    assert_equals(scrollers.length, 2);
+    let target = main.querySelector('.target');
+    await scrollTop(scrollers[0], 350); // 50%
+    await scrollTop(scrollers[1], 175); // 25%
+
+    // Attached to no timelines initially:
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+
+    // Attach to scrollers[0].
+    scrollers[0].classList.add('ancestor');
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+
+    // Also attach scrollers[1].
+    scrollers[1].classList.add('ancestor');
+
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+  }, 'Dynamically attaching');
+</script>
+
+
+<template id=scroll_timeline_dynamic_detach_second>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class="scroller timeline ancestor">
+      <div class=content></div>
+    </div>
+    <div class="scroller timeline ancestor">
+      <div class=content></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, scroll_timeline_dynamic_detach_second);
+    let scrollers = main.querySelectorAll('.scroller');
+    assert_equals(scrollers.length, 2);
+    let target = main.querySelector('.target');
+    await scrollTop(scrollers[0], 350); // 50%
+    await scrollTop(scrollers[1], 175); // 25%
+
+    // Attached to two timelines initially:
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+
+    // Detach scrollers[1].
+    scrollers[1].classList.remove('ancestor');
+
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+
+    // Also detach scrollers[0].
+    scrollers[0].classList.remove('ancestor');
+
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+  }, 'Dynamically detaching');
+</script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/scroll-timeline-axis-writing-mode.html b/tests/wpt/web-platform-tests/scroll-animations/css/scroll-timeline-axis-writing-mode.html
index 37b4dfdf549..958ce4964e8 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/scroll-timeline-axis-writing-mode.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/scroll-timeline-axis-writing-mode.html
@@ -41,15 +41,16 @@
     scroll-timeline: timeline_inline_in_vertical inline;
     writing-mode: vertical-lr;
   }
-  #container > div {
+  .target {
     width: 0px;
     animation-name: expand;
     animation-duration: 10s;
     animation-timing-function: linear;
+    position: absolute;
   }
   /* Ensure stable expectations if feature is not supported */
   @supports not (animation-timeline:foo) {
-    #container > div { animation-play-state: paused; }
+    .target { animation-play-state: paused; }
   }
   #element_initial_axis { animation-timeline: timeline_initial_axis; }
   #element_vertical { animation-timeline: timeline_vertical; }
@@ -59,21 +60,33 @@
   #element_block_in_vertical { animation-timeline: timeline_block_in_vertical; }
   #element_inline_in_vertical { animation-timeline: timeline_inline_in_vertical; }
 </style>
-<div class=scroller id=timeline_initial_axis><div class=contents></div></div>
-<div class=scroller id=timeline_vertical><div class=contents></div></div>
-<div class=scroller id=timeline_horizontal><div class=contents></div></div>
-<div class=scroller id=timeline_block_in_horizontal><div class=contents></div></div>
-<div class=scroller id=timeline_inline_in_horizontal><div class=contents></div></div>
-<div class=scroller id=timeline_block_in_vertical><div class=contents></div></div>
-<div class=scroller id=timeline_inline_in_vertical><div class=contents></div></div>
-<div id=container>
-  <div id=element_initial_axis></div>
-  <div id=element_vertical></div>
-  <div id=element_horizontal></div>
-  <div id=element_block_in_horizontal></div>
-  <div id=element_inline_in_horizontal></div>
-  <div id=element_block_in_vertical></div>
-  <div id=element_inline_in_vertical></div>
+<div class=scroller id=timeline_initial_axis>
+  <div class=contents></div>
+  <div class=target id=element_initial_axis></div>
+</div>
+<div class=scroller id=timeline_vertical>
+  <div class=contents></div>
+  <div class=target id=element_vertical></div>
+</div>
+<div class=scroller id=timeline_horizontal>
+  <div class=contents></div>
+  <div class=target id=element_horizontal></div>
+</div>
+<div class=scroller id=timeline_block_in_horizontal>
+  <div class=contents></div>
+  <div class=target id=element_block_in_horizontal></div>
+</div>
+<div class=scroller id=timeline_inline_in_horizontal>
+  <div class=contents></div>
+  <div class=target id=element_inline_in_horizontal></div>
+</div>
+<div class=scroller id=timeline_block_in_vertical>
+  <div class=contents></div>
+  <div class=target id=element_block_in_vertical></div>
+</div>
+<div class=scroller id=timeline_inline_in_vertical>
+  <div class=contents></div>
+  <div class=target id=element_inline_in_vertical></div>
 </div>
 <script>
   // Animations linked to vertical scroll-timelines are at 75% progress.
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/timeline-offset-keyframes-hidden-subject.html b/tests/wpt/web-platform-tests/scroll-animations/css/timeline-offset-keyframes-hidden-subject.html
index 047acfed33f..389c8baca3a 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/timeline-offset-keyframes-hidden-subject.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/timeline-offset-keyframes-hidden-subject.html
@@ -62,7 +62,10 @@
   async function runTest() {
     promise_test(async t => {
       await waitForNextFrame();
-      const anim = document.getAnimations()[0];
+      const anims = document.getAnimations();
+      assert_equals(anims.length, 1,
+                    "Should have one animation attatched to the view-timeline");
+      const anim = anims[0];
       await anim.ready;
       await waitForNextFrame();
 
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/timeline-range-name-offset-in-keyframes.tentative.html b/tests/wpt/web-platform-tests/scroll-animations/css/timeline-range-name-offset-in-keyframes.tentative.html
index a0d1bd92f09..7bae49c2e97 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/timeline-range-name-offset-in-keyframes.tentative.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/timeline-range-name-offset-in-keyframes.tentative.html
@@ -51,7 +51,6 @@
       // scrollTop=200 to 400 is the entry range
       container.scrollTop = 200;
       await waitForNextFrame();
-      const anim = document.getAnimations()[0];
       assert_equals(getComputedStyle(subject).opacity, '0',
                     'Effect at entry 0%');
 
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-animation.html b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-animation.html
index b816bb68973..73189b85917 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-animation.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-animation.html
@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <title>Animations using view-timeline</title>
+<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
 <link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#view-timelines-named">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-attachment.html b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-attachment.html
new file mode 100644
index 00000000000..47f4444b0dc
--- /dev/null
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-attachment.html
@@ -0,0 +1,338 @@
+<!DOCTYPE html>
+<title>View Timeline Attachment</title>
+<link rel="help" src="https://github.com/w3c/csswg-drafts/issues/7759">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/web-animations/testcommon.js"></script>
+
+<main id=main></main>
+<script>
+  function inflate(t, template) {
+    t.add_cleanup(() => main.replaceChildren());
+    main.append(template.content.cloneNode(true));
+    main.offsetTop;
+  }
+
+  async function scrollTop(e, value) {
+    e.scrollTop = value;
+    await waitForNextFrame();
+  }
+</script>
+<style>
+  @keyframes anim {
+    from { width: 0px; --applied:true; }
+    to { width: 200px; --applied:true; }
+  }
+
+  .scroller {
+    overflow-y: hidden;
+    width: 200px;
+    height: 200px;
+  }
+  .scroller > .content {
+    margin: 400px 0px;
+    width: 100px;
+    height: 100px;
+    background-color: green;
+  }
+  .target {
+    background-color: coral;
+    width: 0px;
+    animation: anim auto linear;
+    animation-timeline: t1;
+  }
+  /*
+  .defer {
+    view-timeline-name: t1;
+    view-timeline-attachment: defer;
+  }
+  */
+  .timeline {
+    view-timeline-name: t1;
+  }
+  .local {
+    view-timeline-attachment: local;
+  }
+  .defer {
+    view-timeline-attachment: defer;
+  }
+  .ancestor {
+    view-timeline-attachment: ancestor;
+  }
+
+</style>
+
+<!-- Basic Behavior -->
+
+<template id=view_timeline_defer>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="content timeline ancestor"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_defer);
+    let scroller = main.querySelector('.scroller');
+    let target = main.querySelector('.target');
+    await scrollTop(scroller, 350); // 50%
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+  }, 'Descendant can attach to deferred timeline');
+</script>
+
+<template id=view_timeline_defer_no_attach>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="timeline content"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_defer_no_attach);
+    let scroller = main.querySelector('.scroller');
+    let target = main.querySelector('.target');
+    await scrollTop(scroller, 350); // 50%
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+  }, 'Deferred timeline with no attachments');
+</script>
+
+<template id=view_timeline_defer_two_attachments>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="content timeline ancestor"></div>
+      <!-- Extra attachment -->
+      <div class="timeline ancestor"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_defer_two_attachments);
+    let scroller = main.querySelector('.scroller');
+    let target = main.querySelector('.target');
+    await scrollTop(scroller, 350); // 50%
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+  }, 'Deferred timeline with two attachments');
+</script>
+
+<!-- Effective Axis of ViewTimeline -->
+
+<template id=view_timeline_defer_axis>
+  <div class="timeline defer" style="view-timeline-axis:inline">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="content timeline ancestor" style="view-timeline-axis:vertical"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_defer_axis);
+    let target = main.querySelector('.target');
+    assert_equals(target.getAnimations().length, 1);
+    let anim = target.getAnimations()[0];
+    assert_not_equals(anim.timeline, null);
+    assert_equals(anim.timeline.axis, 'vertical');
+  }, 'Axis of deferred timeline is taken from attached timeline');
+</script>
+
+<template id=view_timeline_defer_axis_multiple>
+  <div class="timeline defer" style="view-timeline-axis:inline">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="content timeline ancestor" style="view-timeline-axis:vertical"></div>
+      <!-- Extra attachment -->
+      <div class="timeline ancestor"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_defer_axis_multiple);
+    let target = main.querySelector('.target');
+    assert_equals(target.getAnimations().length, 1);
+    let anim = target.getAnimations()[0];
+    assert_not_equals(anim.timeline, null);
+    assert_equals(anim.timeline.axis, 'block');
+  }, 'Axis of deferred timeline with multiple attachments');
+</script>
+
+<!-- Effective Inset of ViewTimeline -->
+
+<template id=view_timeline_inset>
+  <div class="timeline defer" style="view-timeline-inset:0px">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="content timeline ancestor" style="view-timeline-inset:50px"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_inset);
+    let scroller = main.querySelector('.scroller');
+    let target = main.querySelector('.target');
+
+    // Range: [200, 500] + [50, -50] (inset) = [250, 450]
+    await scrollTop(scroller, 300); // 25%
+    assert_equals(getComputedStyle(target).width, '50px'); // 0px => 200px, 25%
+  }, 'Inset of deferred timeline is taken from attached timeline');
+</script>
+
+<!-- Dynamic Reattachment -->
+
+<template id=view_timeline_reattach>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="content timeline ancestor"></div>
+    </div>
+    <div class=scroller>
+      <div class="content timeline"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_reattach);
+    let scrollers = main.querySelectorAll('.scroller');
+    let contents = main.querySelectorAll('.content');
+    assert_equals(scrollers.length, 2);
+    let target = main.querySelector('.target');
+    // Range: [200, 500]
+    await scrollTop(scrollers[0], 350); // 50%
+    await scrollTop(scrollers[1], 275); // 25%
+
+    // Attached to contents[0].
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+
+    // Reattach to contents[1].
+    contents[0].classList.remove('ancestor');
+    contents[1].classList.add('ancestor');
+
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '50px'); // 0px => 200px, 25%
+  }, 'Dynamically re-attaching');
+</script>
+
+
+<template id=view_timeline_dynamic_attach_second>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="timeline content"></div>
+    </div>
+    <div class=scroller>
+      <div class="timeline content"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_dynamic_attach_second);
+    let scrollers = main.querySelectorAll('.scroller');
+    let contents = main.querySelectorAll('.content');
+    assert_equals(scrollers.length, 2);
+    let target = main.querySelector('.target');
+    // Range: [200, 500]
+    await scrollTop(scrollers[0], 350); // 50%
+    await scrollTop(scrollers[1], 275); // 25%
+
+    // Attached to no timelines initially:
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+
+    // Attach to contents[0].
+    contents[0].classList.add('ancestor');
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+
+    // Also attach contents[1].
+    contents[1].classList.add('ancestor');
+
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+  }, 'Dynamically attaching');
+</script>
+
+
+<template id=view_timeline_dynamic_detach_second>
+  <div class="timeline defer">
+    <div class=target>Test</div>
+    <div class=scroller>
+      <div class="content timeline ancestor"></div>
+    </div>
+    <div class=scroller>
+      <div class="content timeline ancestor"></div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_timeline_dynamic_detach_second);
+    let scrollers = main.querySelectorAll('.scroller');
+    let contents = main.querySelectorAll('.content');
+    assert_equals(scrollers.length, 2);
+    let target = main.querySelector('.target');
+    // Range: [200, 500]
+    await scrollTop(scrollers[0], 350); // 50%
+    await scrollTop(scrollers[1], 275); // 25%
+
+    // Attached to two timelines initially:
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+
+    // Detach contents[1].
+    contents[1].classList.remove('ancestor');
+
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '100px'); // 0px => 200px, 50%
+
+    // Also detach contents[0].
+    contents[0].classList.remove('ancestor');
+
+    await waitForNextFrame();
+    assert_equals(getComputedStyle(target).width, '0px');
+    assert_equals(getComputedStyle(target).getPropertyValue('--applied'), '');
+  }, 'Dynamically detaching');
+</script>
+
+<!-- ViewTimelines and ScrollTimelines -->
+
+<template id=view_scroll_timeline_defer>
+  <div style="scroll-timeline: t1 defer">
+    <div class=target>Test1</div>
+    <div class="timeline defer">
+      <div class=target>Test2</div>
+      <div class=scroller style="scroll-timeline: t1 ancestor;">
+        <div class="content timeline ancestor" style="view-timeline-inset: 0px 50px"></div>
+      </div>
+    </div>
+  </div>
+</template>
+<script>
+  promise_test(async (t) => {
+    inflate(t, view_scroll_timeline_defer);
+    let scroller = main.querySelector('.scroller');
+    let targets = main.querySelectorAll('.target');
+    await scrollTop(scroller, 350);
+
+    // Attached to ScrollTimeline:
+    // Range: [0, 700]
+    // 350 => 50%
+    assert_equals(getComputedStyle(targets[0]).width, '100px');
+
+    // Attached to ViewTimeline:
+    // Range: [200, 500] + [50, 0] (inset) = [250, 500]
+    // 350 => 40%
+    assert_equals(getComputedStyle(targets[1]).width, '80px');
+  }, 'Mixing deferred scroll and view-timelines');
+</script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-inset-animation.html b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-inset-animation.html
index a95086b62bf..a7e807c2e81 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-inset-animation.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-inset-animation.html
@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <title>Animations using view-timeline-inset</title>
+<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
 <link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#propdef-view-timeline-inset">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-keyframe-boundary-interpolation.html b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-keyframe-boundary-interpolation.html
index 1dc766d961c..04eb6489490 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-keyframe-boundary-interpolation.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-keyframe-boundary-interpolation.html
@@ -80,7 +80,10 @@
 
     promise_test(async t => {
       await waitForNextFrame();
-      const anim = document.getAnimations()[0];
+      const anims = document.getAnimations();
+      assert_equals(anims.length, 1,
+                    "Should have one animation attatched to the view-timeline");
+      const anim = anims[0];
       await anim.ready;
       await waitForNextFrame();
 
diff --git a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-lookup.html b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-lookup.html
index c1797c7ba1c..b8a5b0008be 100644
--- a/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-lookup.html
+++ b/tests/wpt/web-platform-tests/scroll-animations/css/view-timeline-lookup.html
@@ -260,8 +260,7 @@
   }, 'view-timeline on ancestor sibling, closer scroll-timeline wins');
 </script>
 
-
-<template id=timeline_ancestor_view_timeline_wins_on_same_element>
+<template id=timeline_ancestor_scroll_timeline_wins_on_same_element>
   <style>
     #timelines {
       height: 0px;
@@ -294,8 +293,11 @@
 </template>
 <script>
   promise_test(async (t) => {
-    inflate(t, timeline_ancestor_view_timeline_wins_on_same_element);
+    inflate(t, timeline_ancestor_scroll_timeline_wins_on_same_element);
     await waitForNextFrame();
-    assert_equals(getComputedStyle(target).zIndex, '75');
-  }, 'view-timeline on ancestor sibling, view-timeline wins on same element');
+    // In case of a name conflict on the same element, scroll progress timelines
+    // take precedence over view progress timelines.
+    // https://drafts.csswg.org/scroll-animations-1/#timeline-scope
+    assert_equals(getComputedStyle(target).zIndex, '0');
+  }, 'view-timeline on ancestor sibling, scroll-timeline wins on same element');
 </script>
diff --git a/tests/wpt/web-platform-tests/secure-payment-confirmation/authentication-disallowed-when-hidden.https.html b/tests/wpt/web-platform-tests/secure-payment-confirmation/authentication-disallowed-when-hidden.https.html
new file mode 100644
index 00000000000..1c01fa0e89c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/secure-payment-confirmation/authentication-disallowed-when-hidden.https.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Test for the 'secure-payment-confirmation' payment method authentication - accepted case</title>
+<link rel="help" href="https://w3c.github.io/secure-payment-confirmation#sctn-authentication">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<!-- For minimize() -->
+<script src="/page-visibility/resources/window_state_context.js"></script>
+<script src="utils.sub.js"></script>
+<script>
+'use strict';
+
+promise_test(async t => {
+  const {minimize, restore} = window_state_context(t);
+
+  const authenticator = await window.test_driver.add_virtual_authenticator(
+      AUTHENTICATOR_OPTS);
+  t.add_cleanup(() => {
+    return window.test_driver.remove_virtual_authenticator(authenticator);
+  });
+
+  await window.test_driver.set_spc_transaction_mode("autoAccept");
+  t.add_cleanup(() => {
+    return window.test_driver.set_spc_transaction_mode("none");
+  });
+
+  const credential = await createCredential();
+
+  const challenge = 'server challenge';
+  const payeeOrigin = 'https://merchant.com';
+  const displayName = 'Troycard ***1234';
+  const request = new PaymentRequest([{
+    supportedMethods: 'secure-payment-confirmation',
+    data: {
+      credentialIds: [credential.rawId],
+      challenge: Uint8Array.from(challenge, c => c.charCodeAt(0)),
+      payeeOrigin,
+      rpId: window.location.hostname,
+      timeout: 60000,
+      instrument: {
+        displayName,
+        icon: ICON_URL,
+      },
+    }
+  }], PAYMENT_DETAILS);
+
+  // Before we trigger the Payment Request, minimize the window. This should
+  // cause the show() call to be rejected.
+  await minimize();
+  assert_equals(document.hidden, true);
+
+  await test_driver.bless('user activation');
+  return promise_rejects_dom(t, "AbortError", request.show());
+}, 'SPC authentication cannot be triggered from a hidden context');
+</script>
diff --git a/tests/wpt/web-platform-tests/shadow-dom/leaktests/html-collection.html b/tests/wpt/web-platform-tests/shadow-dom/leaktests/html-collection.html
index 2f3d49ec267..1ce2cf34401 100644
--- a/tests/wpt/web-platform-tests/shadow-dom/leaktests/html-collection.html
+++ b/tests/wpt/web-platform-tests/shadow-dom/leaktests/html-collection.html
@@ -67,10 +67,13 @@ var testParams = [
     ['document.links should not contain shadow nodes', 'links'],
     ['document.anchors should not contain shadow nodes', 'anchors'],
     ['document.embeds should not contain shadow nodes', 'embeds'],
-    ['document.plugins should not contain shadow nodes', 'plugins'],
-    ['document.applets should not contain shadow nodes', 'applets']];
+    ['document.plugins should not contain shadow nodes', 'plugins']];
 
 generate_tests(testCollection, testParams);
 
+test(() => {
+  assert_equals(document.applets.length, 0);
+}, 'document.applets should not contain any nodes');
+
 </script>
 </html>
diff --git a/tests/wpt/web-platform-tests/shared-storage/insecure-context.tentative.http.html b/tests/wpt/web-platform-tests/shared-storage/insecure-context.tentative.http.html
new file mode 100644
index 00000000000..7ddf02f861a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/shared-storage/insecure-context.tentative.http.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<body>
+  <script src=/resources/testharness.js></script>
+  <script src=/resources/testharnessreport.js></script>
+  <script>
+    test(t => {
+      assert_equals(window.sharedStorage, undefined);
+    }, 'test window.sharedStorage in insecure context');
+  </script>
+</body>
diff --git a/tests/wpt/web-platform-tests/speculation-rules/prefetch/different-initiators-2.https.html b/tests/wpt/web-platform-tests/speculation-rules/prefetch/different-initiators-2.https.html
new file mode 100644
index 00000000000..69e84333aa4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/speculation-rules/prefetch/different-initiators-2.https.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/utils.js"></script>
+<script src="/common/dispatcher/dispatcher.js"></script>
+<script src="resources/utils.sub.js"></script>
+<script src="/service-workers/service-worker/resources/test-helpers.sub.js"></script>
+<script>
+// Regression test for https://crbug.com/1431804.
+promise_test(async t => {
+  assert_implements(HTMLScriptElement.supports('speculationrules'),
+      "Speculation Rules not supported");
+
+  const win = await spawnWindow(t, { protocol: 'https' });
+  const nextUrl = win.getExecutorURL({ protocol: 'https', page: 2 });
+
+  // Navigate `win` from Document #1 -> #2 (nextUrl) -> #3 (tempUrl) ->
+  // #4 (nextUrl),
+  // Start speculation rules prefetch from #1, and
+  // Try using the prefetched result for the navigation #3 -> #4.
+  // The Documents #2 and #4 are different, but the same RenderFrameHost is
+  // used before https://crbug.com/936696 is done.
+
+  await win.forceSinglePrefetch(nextUrl);
+
+  // Register a SW for `nextUrl` -- this is a trick to make the prefetched
+  // result to put in `PrefetchService::prefetches_ready_to_serve_` in
+  // Chromium implementation but actually not used by this navigation.
+  const r = await service_worker_unregister_and_register(
+      t, 'resources/sw.js', nextUrl);
+  await wait_for_state(t, r.installing, 'activated');
+
+  // Navigate #1 -> #2.
+  // This doesn't use the prefetched result due to the ServiceWorker.
+  await win.navigate(nextUrl);
+
+  // Unregister the SW.
+  await service_worker_unregister(t, nextUrl);
+
+  // Navigate #2 -> #3 -> #4.
+  const tempUrl = win.getExecutorURL({ protocol: 'https', page: 3 });
+  await win.navigate(tempUrl);
+  await win.navigate(nextUrl);
+
+  const headers = await win.execute_script(() => {
+    return requestHeaders;
+  }, []);
+  assert_not_prefetched(headers,
+      "Prefetch should not work for different initiators.");
+}, "Prefetches from different initiator Documents with same RenderFrameHost");
+</script>
diff --git a/tests/wpt/web-platform-tests/subapps/remove-error.tentative.https.html b/tests/wpt/web-platform-tests/subapps/remove-error.tentative.https.html
index e85ffd74a78..917c3b4d022 100644
--- a/tests/wpt/web-platform-tests/subapps/remove-error.tentative.https.html
+++ b/tests/wpt/web-platform-tests/subapps/remove-error.tentative.https.html
@@ -20,7 +20,7 @@ promise_test(async t => {
 
   // At this point the iframe is detached and unloaded, and its execution
   // context is gone.
-  await promise_rejects_dom(t, 'NotFoundError', iframeDOMException, iframeNavigator.subApps.remove('/sub-app-id'));
+  await promise_rejects_dom(t, 'NotFoundError', iframeDOMException, iframeNavigator.subApps.remove(['/sub-app-id']));
 }, "The object is no longer associated to a document.");
 
 promise_test(async t => {
@@ -31,22 +31,57 @@ promise_test(async t => {
   const iframeDOMException = iframe.contentWindow.DOMException;
   t.add_cleanup(() => iframe.remove());
 
-  await promise_rejects_dom(t, 'InvalidStateError', iframeDOMException, iframeNavigator.subApps.remove('/sub-app-id'));
+  await promise_rejects_dom(t, 'InvalidStateError', iframeDOMException, iframeNavigator.subApps.remove(['/sub-app-id']));
 }, "API is only supported in top-level browsing contexts.");
 
 promise_test(async t => {
   const full_url = document.location.origin + '/sub-app-id';
 
-  await promise_rejects_dom(t, 'NotSupportedError', navigator.subApps.remove(full_url));
+  await promise_rejects_dom(t, 'NotSupportedError', navigator.subApps.remove([full_url]));
 }, 'API supports only root-relative paths.');
 
 promise_test(async t => {
-  t.add_cleanup(async () => {
-      await mockSubAppsService.reset();
-      mockSubAppsService = null;
-  });
-  await createMockSubAppsService(Status.FAILURE, [], []);
-  return promise_rejects_dom(t, 'OperationError', navigator.subApps.remove('/sub-app-id'));
-}, 'Remove call failed.');
+  const url_1 = '/sub-app-1';
+  const url_2 = '/sub-app-2';
+  const url_3 = '/sub-app-3';
+
+  let remove_call_params = [url_1, url_2, url_3];
+
+  let mocked_response = [
+    { "unhashedAppIdPath": url_1, "resultCode": Status.FAILURE },
+    { "unhashedAppIdPath": url_2, "resultCode": Status.FAILURE },
+    { "unhashedAppIdPath": url_3, "resultCode": Status.FAILURE }
+  ];
+
+  let expected_results = {
+    [url_1]: "failure",
+    [url_2]: "failure",
+    [url_3]: "failure"
+  };
+
+  await subapps_remove_expect_reject_with_result(t, remove_call_params, mocked_response, expected_results);
+}, 'Remove call fails.');
+
+promise_test(async t => {
+  const url_1 = '/sub-app-1';
+  const url_2 = '/sub-app-2';
+  const url_3 = '/sub-app-3';
+
+  let remove_call_params = [url_1, url_2, url_3];
+
+  let mocked_response = [
+    { "unhashedAppIdPath": url_1, "resultCode": Status.SUCCESS },
+    { "unhashedAppIdPath": url_2, "resultCode": Status.SUCCESS },
+    { "unhashedAppIdPath": url_3, "resultCode": Status.FAILURE }
+  ];
+
+  let expected_results = {
+    [url_1]: "success",
+    [url_2]: "success",
+    [url_3]: "failure"
+  };
+
+  await subapps_remove_expect_reject_with_result(t, remove_call_params, mocked_response, expected_results);
+}, 'Remove call fails with mixed results.');
 
 </script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/subapps/remove-success.tentative.https.html b/tests/wpt/web-platform-tests/subapps/remove-success.tentative.https.html
index ca73cbea888..6fd4305b434 100644
--- a/tests/wpt/web-platform-tests/subapps/remove-success.tentative.https.html
+++ b/tests/wpt/web-platform-tests/subapps/remove-success.tentative.https.html
@@ -5,8 +5,37 @@
 <script src="resources/subapps-helpers.js"></script>
 <script>
 
-subapps_test(async (t, mockSubAppsService) => {
-  await navigator.subApps.remove('/sub-app-id');
-}, 'Remove API call works.');
+promise_test(async t => {
+
+const url = '/sub-app';
+let remove_call_params = [url];
+let mocked_response = [{ "unhashedAppIdPath": url, "resultCode": Status.SUCCESS }];
+let expected_results = {[url]: "success"};
+
+await subapps_remove_expect_success_with_result(t, remove_call_params, mocked_response, expected_results);
+}, 'Remove API call works with one app.');
+
+promise_test(async t => {
+
+const url_1 = '/sub-app-1';
+const url_2 = '/sub-app-2';
+const url_3 = '/sub-app-3';
+
+let remove_call_params = [url_1, url_2, url_3];
+
+let mocked_response = [
+  { "unhashedAppIdPath": url_1, "resultCode": Status.SUCCESS },
+  { "unhashedAppIdPath": url_2, "resultCode": Status.SUCCESS },
+  { "unhashedAppIdPath": url_3, "resultCode": Status.SUCCESS }
+];
+
+let expected_results = {
+  [url_1]: "success",
+  [url_2]: "success",
+  [url_3]: "success"
+};
+
+await subapps_remove_expect_success_with_result(t, remove_call_params, mocked_response, expected_results);
+}, 'Remove API call works with several apps.');
 
 </script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/subapps/resources/subapps-helpers.js b/tests/wpt/web-platform-tests/subapps/resources/subapps-helpers.js
index 9158d15c6c8..38b8d114660 100644
--- a/tests/wpt/web-platform-tests/subapps/resources/subapps-helpers.js
+++ b/tests/wpt/web-platform-tests/subapps/resources/subapps-helpers.js
@@ -15,7 +15,7 @@ const Status = {
   FAILURE: 1,
 };
 
-async function createMockSubAppsService(service_result_code, add_call_return_value, list_call_return_value) {
+async function createMockSubAppsService(service_result_code, add_call_return_value, list_call_return_value, remove_call_return_value) {
   if (typeof SubAppsServiceTest === 'undefined') {
     // Load test-only API helpers.
     const script = document.createElement('script');
@@ -39,7 +39,7 @@ async function createMockSubAppsService(service_result_code, add_call_return_val
 
   if (mockSubAppsService === null) {
     mockSubAppsService = new SubAppsServiceTest();
-    mockSubAppsService.initialize(service_result_code, add_call_return_value, list_call_return_value);
+    mockSubAppsService.initialize(service_result_code, add_call_return_value, list_call_return_value, remove_call_return_value);
   }
 }
 
@@ -49,7 +49,7 @@ function subapps_test(func, description) {
       await mockSubAppsService.reset();
       mockSubAppsService = null;
     });
-    await createMockSubAppsService(Status.SUCCESS, [], []);
+    await createMockSubAppsService(Status.SUCCESS, [], [], []);
     await func(test, mockSubAppsService);
   }, description);
 }
@@ -60,7 +60,7 @@ async function subapps_add_expect_reject_with_result(t, add_call_params, mocked_
     mockSubAppsService = null;
   });
 
-  await createMockSubAppsService(Status.FAILURE, mocked_response, []);
+  await createMockSubAppsService(Status.FAILURE, mocked_response, [], []);
   await navigator.subApps.add(add_call_params).then(
     result => {
       assert_unreached("Should have rejected: ", result);
@@ -79,7 +79,7 @@ async function subapps_add_expect_success_with_result(t, add_call_params, mocked
     mockSubAppsService = null;
   });
 
-  await createMockSubAppsService(Status.SUCCESS, mocked_response);
+  await createMockSubAppsService(Status.SUCCESS, mocked_response, [], []);
   await navigator.subApps.add(add_call_params).then(result => {
     for (const app_id in expected_results) {
       assert_own_property(result, app_id, "Return results are missing entry for subapp.")
@@ -87,3 +87,37 @@ async function subapps_add_expect_success_with_result(t, add_call_params, mocked
     }
   });
 }
+
+async function subapps_remove_expect_reject_with_result(t, remove_call_params, mocked_response, expected_results) {
+  t.add_cleanup(async () => {
+    await mockSubAppsService.reset();
+    mockSubAppsService = null;
+  });
+
+  await createMockSubAppsService(Status.FAILURE, [], [], mocked_response);
+  await navigator.subApps.remove(remove_call_params).then(
+    result => {
+      assert_unreached("Should have rejected: ", result);
+    },
+    error => {
+      for (const app_id in expected_results) {
+        assert_own_property(error, app_id, "Return results are missing entry for subapp.")
+        assert_equals(error[app_id], expected_results[app_id], "Return results are not as expected.")
+      }
+    });
+}
+
+async function subapps_remove_expect_success_with_result(t, remove_call_params, mocked_response, expected_results) {
+  t.add_cleanup(async () => {
+    await mockSubAppsService.reset();
+    mockSubAppsService = null;
+  });
+
+  await createMockSubAppsService(Status.SUCCESS, [], [], mocked_response);
+  await navigator.subApps.remove(remove_call_params).then(result => {
+    for (const app_id in expected_results) {
+      assert_own_property(result, app_id, "Return results are missing entry for subapp.")
+      assert_equals(result[app_id], expected_results[app_id], "Return results are not as expected.")
+    }
+  });
+}
diff --git a/tests/wpt/web-platform-tests/svg/text/reftests/opacity-ref.svg b/tests/wpt/web-platform-tests/svg/text/reftests/opacity-ref.svg
new file mode 100644
index 00000000000..18c00ab332c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/text/reftests/opacity-ref.svg
@@ -0,0 +1,26 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+  <style>
+    text {
+      font-size: 50px;
+    }
+  </style>
+  <defs>
+    <path id="path" d="M100, 120 300, 120"/>
+  </defs>
+  <text x="100" y="60" opacity="0.5">
+    <tspan>tspan</tspan>
+  </text>
+  <text opacity="0.5">
+    <textPath href="#path">textPath</textPath>
+  </text>
+  <text x="100" y="180" opacity="0.5">
+    <a href="https://www.w3.org"><tspan>link</tspan></a>
+  </text>
+  <text x="100" y="240" opacity="0.5">
+    <a href="https://www.w3.org"><tspan>another link</tspan></a>
+  </text>
+  <text x="100" y="300" opacity="0.25" font-family="Ahem">
+    <tspan>XXXX</tspan>
+  </text>
+</svg>
diff --git a/tests/wpt/web-platform-tests/svg/text/reftests/opacity.svg b/tests/wpt/web-platform-tests/svg/text/reftests/opacity.svg
new file mode 100644
index 00000000000..949de0cbf0c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/text/reftests/opacity.svg
@@ -0,0 +1,31 @@
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:h="http://www.w3.org/1999/xhtml">
+  <metadata>
+    <h:title>Opacity on tspan, textPath, and a elements</h:title>
+    <h:link rel="help" href="https://svgwg.org/svg2-draft/text.html"/>
+    <h:link rel="match" href="opacity-ref.svg"/>
+    <h:link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
+  </metadata>
+  <style>
+    text {
+      font-size: 50px;
+    }
+  </style>
+  <defs>
+    <path id="path" d="M100, 120 300, 120"/>
+  </defs>
+  <text x="100" y="60">
+    <tspan style="opacity: 0.5">tspan</tspan>
+  </text>
+  <text>
+    <textPath href="#path" style="opacity: 0.5">textPath</textPath>
+  </text>
+  <text x="100" y="180">
+    <a href="https://www.w3.org" style="opacity: 0.5"><tspan>link</tspan></a>
+  </text>
+  <text x="100" y="240">
+    <a href="https://www.w3.org"><tspan style="opacity: 0.5">another link</tspan></a>
+  </text>
+  <text x="100" y="300" opacity="0.5" font-family="Ahem">
+    <tspan style="opacity: 0.5">XXXX</tspan>
+  </text>
+</svg>
diff --git a/tests/wpt/web-platform-tests/tools/ci/requirements_build.txt b/tests/wpt/web-platform-tests/tools/ci/requirements_build.txt
index 03fe7d73efa..c2137af3156 100644
--- a/tests/wpt/web-platform-tests/tools/ci/requirements_build.txt
+++ b/tests/wpt/web-platform-tests/tools/ci/requirements_build.txt
@@ -1,5 +1,5 @@
 cairocffi==1.5.0
-fonttools==4.33.2
+fonttools==4.39.3
 genshi==0.7.7
 jinja2==3.1.2
 pyyaml==6.0
diff --git a/tests/wpt/web-platform-tests/tools/ci/requirements_tc.txt b/tests/wpt/web-platform-tests/tools/ci/requirements_tc.txt
index 53b10f8dcaa..64b51841b0c 100644
--- a/tests/wpt/web-platform-tests/tools/ci/requirements_tc.txt
+++ b/tests/wpt/web-platform-tests/tools/ci/requirements_tc.txt
@@ -1,4 +1,4 @@
 pygithub==1.58.1
 pyyaml==6.0
 requests==2.28.2
-taskcluster==48.2.1
+taskcluster==49.0.0
diff --git a/tests/wpt/web-platform-tests/tools/ci/run_tc.py b/tests/wpt/web-platform-tests/tools/ci/run_tc.py
index 46e3d613a99..a5a6256ad54 100755
--- a/tests/wpt/web-platform-tests/tools/ci/run_tc.py
+++ b/tests/wpt/web-platform-tests/tools/ci/run_tc.py
@@ -46,8 +46,8 @@ import tarfile
 import tempfile
 import zipfile
 
-sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
-from wpt.utils import get_download_to_descriptor  # type: ignore
+sys.path.append(os.path.abspath(os.path.join(os.path.dirname(__file__), '..', '..')))
+from tools.wpt.utils import get_download_to_descriptor
 
 root = os.path.abspath(
     os.path.join(os.path.dirname(__file__),
diff --git a/tests/wpt/web-platform-tests/tools/lint/lint.py b/tests/wpt/web-platform-tests/tools/lint/lint.py
index 89ecee8035c..f255c024952 100644
--- a/tests/wpt/web-platform-tests/tools/lint/lint.py
+++ b/tests/wpt/web-platform-tests/tools/lint/lint.py
@@ -689,7 +689,7 @@ class OpenModeCheck(ASTCheck):
         errors = []
         for node in ast.walk(root):
             if isinstance(node, ast.Call):
-                if hasattr(node.func, "id") and node.func.id in ("open", "file"):  # type: ignore
+                if hasattr(node.func, "id") and node.func.id in ("open", "file"):
                     if (len(node.args) < 2 and
                         all(item.arg != "mode" for item in node.keywords)):
                         errors.append(node.lineno)
diff --git a/tests/wpt/web-platform-tests/tools/manifest/XMLParser.py b/tests/wpt/web-platform-tests/tools/manifest/XMLParser.py
index 689533421d7..21be8a26cd3 100644
--- a/tests/wpt/web-platform-tests/tools/manifest/XMLParser.py
+++ b/tests/wpt/web-platform-tests/tools/manifest/XMLParser.py
@@ -62,7 +62,7 @@ class XMLParser:
         self._parser.EndElementHandler = self._end
         self._parser.CharacterDataHandler = self._data
         self._parser.ExternalEntityRefHandler = self._external
-        self._parser.SkippedEntityHandler = self._skipped  # type: ignore
+        self._parser.SkippedEntityHandler = self._skipped
         # used for our horrible re-encoding hack
         self._fed_data = []  # type: Optional[List[bytes]]
         self._read_encoding = None  # type: Optional[Text]
diff --git a/tests/wpt/web-platform-tests/tools/manifest/item.py b/tests/wpt/web-platform-tests/tools/manifest/item.py
index 02a72eeb292..f798ec2ae8d 100644
--- a/tests/wpt/web-platform-tests/tools/manifest/item.py
+++ b/tests/wpt/web-platform-tests/tools/manifest/item.py
@@ -29,16 +29,14 @@ class ManifestItemMeta(ABCMeta):
 
         assert issubclass(inst, ManifestItem)
         if MYPY:
-            inst_ = cast(Type[ManifestItem], inst)
-            item_type = cast(str, inst_.item_type)
+            item_type = cast(str, inst.item_type)
         else:
-            inst_ = inst
-            assert isinstance(inst_.item_type, str)
-            item_type = inst_.item_type
+            assert isinstance(inst.item_type, str)
+            item_type = inst.item_type
 
-        item_types[item_type] = inst_
+        item_types[item_type] = inst
 
-        return inst_
+        return inst
 
 
 class ManifestItem(metaclass=ManifestItemMeta):
diff --git a/tests/wpt/web-platform-tests/tools/mypy.ini b/tests/wpt/web-platform-tests/tools/mypy.ini
index fb9b5c81c2c..def40c0bd06 100644
--- a/tests/wpt/web-platform-tests/tools/mypy.ini
+++ b/tests/wpt/web-platform-tests/tools/mypy.ini
@@ -7,6 +7,7 @@
 # - tools/wptserve/docs/conf.py (generated code)
 # - tools/wptserve/tests/ (deliberately invalid syntax)
 exclude = (^tools/third_party/|/setup\.py$|^tools/wptserve/docs/conf.py|^tools/wptserve/tests/)
+mypy_path = tools/wptrunner:tools/wptserve:tools/webdriver:tools/webtransport
 #check_untyped_defs = True
 disallow_any_generics = True
 disallow_incomplete_defs = True
diff --git a/tests/wpt/web-platform-tests/tools/requirements_mypy.txt b/tests/wpt/web-platform-tests/tools/requirements_mypy.txt
index ff878deb613..c95a836e6ab 100644
--- a/tests/wpt/web-platform-tests/tools/requirements_mypy.txt
+++ b/tests/wpt/web-platform-tests/tools/requirements_mypy.txt
@@ -1,12 +1,14 @@
-mypy==0.961
-mypy-extensions==0.4.3
+mypy==1.2.0
+mypy-extensions==1.0.0
 toml==0.10.2
+tomli==2.0.1
 typed-ast==1.5.4
-types-atomicwrites==1.4.5
-types-python-dateutil==2.8.19
+types-atomicwrites==1.4.5.1
+types-python-dateutil==2.8.19.12
 types-PyYAML==6.0.12.9
-types-requests==2.28.11.16
-types-setuptools==67.6.0.5
+types-requests==2.28.11.17
+types-setuptools==67.6.0.7
 types-six==1.16.21.8
-types-ujson==4.2.1
-typing-extensions==4.1.1
+types-ujson==5.7.0.1
+types-urllib3==1.26.25.10
+typing_extensions==4.5.0
diff --git a/tests/wpt/web-platform-tests/tools/requirements_pytest.txt b/tests/wpt/web-platform-tests/tools/requirements_pytest.txt
index 0bb151cb644..78e1ae4d613 100644
--- a/tests/wpt/web-platform-tests/tools/requirements_pytest.txt
+++ b/tests/wpt/web-platform-tests/tools/requirements_pytest.txt
@@ -1,3 +1,3 @@
-pytest==7.2.2
+pytest==7.3.0
 pytest-cov==4.0.0
-hypothesis==6.70.1
+hypothesis==6.71.0
diff --git a/tests/wpt/web-platform-tests/tools/requirements_tests.txt b/tests/wpt/web-platform-tests/tools/requirements_tests.txt
index 26bf23a7f5e..9ccaaa0d02a 100644
--- a/tests/wpt/web-platform-tests/tools/requirements_tests.txt
+++ b/tests/wpt/web-platform-tests/tools/requirements_tests.txt
@@ -1,5 +1,5 @@
-httpx[http2]==0.23.3
-json-e==4.5.1
+httpx[http2]==0.24.0
+json-e==4.5.2
 jsonschema==4.17.3
 pyyaml==6.0
-taskcluster==48.2.1
+taskcluster==49.0.0
diff --git a/tests/wpt/web-platform-tests/tools/tox.ini b/tests/wpt/web-platform-tests/tools/tox.ini
index 6a3001e25a0..5efbe9b37ab 100644
--- a/tests/wpt/web-platform-tests/tools/tox.ini
+++ b/tests/wpt/web-platform-tests/tools/tox.ini
@@ -16,7 +16,7 @@ changedir =
 commands =
   !flake8-!mypy: pytest --cov=tools --cov-report=term {posargs}
   flake8: flake8 --append-config={toxinidir}/flake8.ini {posargs}
-  mypy: mypy --config-file={toxinidir}/mypy.ini tools/
+  mypy: mypy --config-file={toxinidir}/mypy.ini --explicit-package-bases tools
 
 passenv =
   HYPOTHESIS_PROFILE
diff --git a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/client.py b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/client.py
index 56fa274cdc4..9bb03b34f96 100644
--- a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/client.py
+++ b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/client.py
@@ -145,7 +145,7 @@ class BidiSession:
         await self.transport.start()
 
         if self.session_id is None:
-            self.session_id, self.capabilities = await self.session.new(
+            self.session_id, self.capabilities = await self.session.new(  # type: ignore
                 capabilities=self.requested_capabilities)
 
     async def send_command(
diff --git a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/error.py b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/error.py
index 81910a63eb2..d9ea28c78fd 100644
--- a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/error.py
+++ b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/error.py
@@ -38,6 +38,9 @@ class InvalidArgumentException(BidiException):
 class NoSuchFrameException(BidiException):
     error_code = "no such frame"
 
+class NoSuchHandleException(BidiException):
+    error_code = "no such handle"
+
 
 class NoSuchNodeException(BidiException):
     error_code = "no such node"
diff --git a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/_module.py b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/_module.py
index c2034033c79..e28a83584a8 100644
--- a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/_module.py
+++ b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/_module.py
@@ -1,7 +1,6 @@
 import functools
 from typing import (
     Any,
-    Awaitable,
     Callable,
     Optional,
     Mapping,
@@ -80,10 +79,6 @@ class command:
         # Overwrite the method on the owner class with the wrapper
         setattr(owner, name, inner)
 
-    def __call__(*args: Any, **kwargs: Any) -> Awaitable[Any]:
-        # This isn't really used, but mypy doesn't understand __set_name__
-        pass
-
 
 class BidiModule:
     def __init__(self, session: "BidiSession"):
diff --git a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/input.py b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/input.py
index d2ee17e36e2..be0d745a0ca 100644
--- a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/input.py
+++ b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/modules/input.py
@@ -69,11 +69,11 @@ class PointerAction(Action):
         self.y = y
         self.duration = duration
         self.origin = origin
-        self.width = width,
+        self.width = width
         self.height = height
         self.pressure = pressure
         self.tangential_pressure = tangential_pressure
-        self.tilt_x = tilt_x,
+        self.tilt_x = tilt_x
         self.tilt_y = tilt_y
         self.twist = twist
         self.altitude_angle = altitude_angle
@@ -113,7 +113,7 @@ class PointerAction(Action):
 
 
 class PointerDownAction(PointerAction):
-    type = "pointerDown"
+    action_type = "pointerDown"
 
     def __init__(self,
                  button: int,
@@ -134,7 +134,7 @@ class PointerDownAction(PointerAction):
 
 
 class PointerUpAction(PointerAction):
-    type = "pointerUp"
+    action_type = "pointerUp"
 
     def __init__(self,
                  button: int,
@@ -155,7 +155,7 @@ class PointerUpAction(PointerAction):
 
 
 class PointerMoveAction(PointerAction):
-    type = "pointerMove"
+    action_type = "pointerMove"
 
     def __init__(self,
                  x: int,
@@ -179,7 +179,7 @@ class PointerMoveAction(PointerAction):
 
 
 class WheelScrollAction(Action):
-    type = "scroll"
+    action_type = "scroll"
 
     def __init__(self,
                  x: int,
@@ -355,3 +355,8 @@ class Input(BidiModule):
         else:
             params["actions"] = actions
         return params
+
+    @command
+    def release_actions(self, context: str) -> Mapping[str, Any]:
+        params: MutableMapping[str, Any] = {"context": context}
+        return params
diff --git a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/transport.py b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/transport.py
index a28c484b83c..2d5d8ee9224 100644
--- a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/transport.py
+++ b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/bidi/transport.py
@@ -26,7 +26,7 @@ class Transport:
                  msg_handler: Callable[[Mapping[str, Any]], Coroutine[Any, Any, None]],
                  loop: Optional[asyncio.AbstractEventLoop] = None):
         self.url = url
-        self.connection: Optional[websockets.WebSocketClientProtocol] = None
+        self.connection: Optional[websockets.WebSocketClientProtocol] = None  # type: ignore
         self.msg_handler = msg_handler
         self.send_buf: List[Mapping[str, Any]] = []
 
@@ -37,7 +37,7 @@ class Transport:
         self.read_message_task: Optional[asyncio.Task[Any]] = None
 
     async def start(self) -> None:
-        self.connection = await websockets.connect(self.url)
+        self.connection = await websockets.connect(self.url)  # type: ignore
         self.read_message_task = self.loop.create_task(self.read_messages())
 
         for msg in self.send_buf:
@@ -51,7 +51,7 @@ class Transport:
 
     @staticmethod
     async def _send(
-        connection: websockets.WebSocketClientProtocol,
+        connection: websockets.WebSocketClientProtocol,  # type: ignore
         data: Mapping[str, Any]
     ) -> None:
         msg = json.dumps(data)
diff --git a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/client.py b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/client.py
index 851c6722fc2..f33fc34dac9 100644
--- a/tests/wpt/web-platform-tests/tools/webdriver/webdriver/client.py
+++ b/tests/wpt/web-platform-tests/tools/webdriver/webdriver/client.py
@@ -310,27 +310,24 @@ class Window:
 
         return handles
 
-    # The many "type: ignore" comments here and below are to silence mypy's
-    # "Decorated property not supported" error, which is due to a limitation
-    # in mypy, see https://github.com/python/mypy/issues/1362.
-    @property  # type: ignore
+    @property
     @command
     def rect(self):
         return self.session.send_session_command("GET", "window/rect")
 
-    @rect.setter  # type: ignore
+    @rect.setter
     @command
     def rect(self, new_rect):
         self.session.send_session_command("POST", "window/rect", new_rect)
 
-    @property  # type: ignore
+    @property
     @command
     def size(self):
         """Gets the window size as a tuple of `(width, height)`."""
         rect = self.rect
         return (rect["width"], rect["height"])
 
-    @size.setter  # type: ignore
+    @size.setter
     @command
     def size(self, new_size):
         """Set window size by passing a tuple of `(width, height)`."""
@@ -343,14 +340,14 @@ class Window:
             # for Android. Revert this once it is implemented.
             pass
 
-    @property  # type: ignore
+    @property
     @command
     def position(self):
         """Gets the window position as a tuple of `(x, y)`."""
         rect = self.rect
         return (rect["x"], rect["y"])
 
-    @position.setter  # type: ignore
+    @position.setter
     @command
     def position(self, new_position):
         """Set window position by passing a tuple of `(x, y)`."""
@@ -475,12 +472,12 @@ class UserPrompt:
     def accept(self):
         self.session.send_session_command("POST", "alert/accept")
 
-    @property  # type: ignore
+    @property
     @command
     def text(self):
         return self.session.send_session_command("GET", "alert/text")
 
-    @text.setter  # type: ignore
+    @text.setter
     @command
     def text(self, value):
         body = {"text": value}
@@ -660,12 +657,12 @@ class Session:
         url = urlparse.urljoin("session/%s/" % self.session_id, uri)
         return self.send_command(method, url, body, timeout)
 
-    @property  # type: ignore
+    @property
     @command
     def url(self):
         return self.send_session_command("GET", "url")
 
-    @url.setter  # type: ignore
+    @url.setter
     @command
     def url(self, url):
         if urlparse.urlsplit(url).netloc is None:
@@ -685,12 +682,12 @@ class Session:
     def refresh(self):
         return self.send_session_command("POST", "refresh")
 
-    @property  # type: ignore
+    @property
     @command
     def title(self):
         return self.send_session_command("GET", "title")
 
-    @property  # type: ignore
+    @property
     @command
     def source(self):
         return self.send_session_command("GET", "source")
@@ -702,12 +699,12 @@ class Session:
 
         return value["handle"]
 
-    @property  # type: ignore
+    @property
     @command
     def window_handle(self):
         return self.send_session_command("GET", "window")
 
-    @window_handle.setter  # type: ignore
+    @window_handle.setter
     @command
     def window_handle(self, handle):
         body = {"handle": handle}
@@ -723,12 +720,12 @@ class Session:
 
         return self.send_session_command("POST", url, body)
 
-    @property  # type: ignore
+    @property
     @command
     def handles(self):
         return self.send_session_command("GET", "window/handles")
 
-    @property  # type: ignore
+    @property
     @command
     def active_element(self):
         return self.send_session_command("GET", "element/active")
@@ -855,12 +852,12 @@ class Element:
     def send_keys(self, text):
         return self.send_element_command("POST", "value", {"text": text})
 
-    @property  # type: ignore
+    @property
     @command
     def text(self):
         return self.send_element_command("GET", "text")
 
-    @property  # type: ignore
+    @property
     @command
     def name(self):
         return self.send_element_command("GET", "name")
@@ -869,12 +866,12 @@ class Element:
     def style(self, property_name):
         return self.send_element_command("GET", "css/%s" % property_name)
 
-    @property  # type: ignore
+    @property
     @command
     def rect(self):
         return self.send_element_command("GET", "rect")
 
-    @property  # type: ignore
+    @property
     @command
     def selected(self):
         return self.send_element_command("GET", "selected")
@@ -883,7 +880,7 @@ class Element:
     def screenshot(self):
         return self.send_element_command("GET", "screenshot")
 
-    @property  # type: ignore
+    @property
     @command
     def shadow_root(self):
         return self.send_element_command("GET", "shadow")
diff --git a/tests/wpt/web-platform-tests/tools/webtransport/h3/webtransport_h3_server.py b/tests/wpt/web-platform-tests/tools/webtransport/h3/webtransport_h3_server.py
index 6384a5aefb2..141bd9f7dc9 100644
--- a/tests/wpt/web-platform-tests/tools/webtransport/h3/webtransport_h3_server.py
+++ b/tests/wpt/web-platform-tests/tools/webtransport/h3/webtransport_h3_server.py
@@ -23,7 +23,8 @@ from aioquic.quic.connection import stream_is_unidirectional
 from aioquic.quic.events import QuicEvent, ProtocolNegotiated, ConnectionTerminated, StreamReset  # type: ignore
 from aioquic.tls import SessionTicket  # type: ignore
 
-from tools.wptserve.wptserve import stash  # type: ignore
+from tools import localpaths  # noqa: F401
+from wptserve import stash
 from .capsule import H3Capsule, H3CapsuleDecoder, CapsuleType
 
 """
@@ -309,8 +310,8 @@ class WebTransportSession:
     def stash(self) -> stash.Stash:
         """A Stash object for storing cross-session state."""
         if self._stash is None:
-            address, authkey = stash.load_env_config()
-            self._stash = stash.Stash(self._stash_path, address, authkey)
+            address, authkey = stash.load_env_config()  # type: ignore
+            self._stash = stash.Stash(self._stash_path, address, authkey)  # type: ignore
         return self._stash
 
     @property
diff --git a/tests/wpt/web-platform-tests/tools/wpt/browser.py b/tests/wpt/web-platform-tests/tools/wpt/browser.py
index d6c238a1f27..7a046e8f07c 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/browser.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/browser.py
@@ -7,7 +7,7 @@ import stat
 import subprocess
 import tempfile
 from abc import ABCMeta, abstractmethod
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from distutils.spawn import find_executable
 from urllib.parse import urlsplit
 
@@ -93,6 +93,36 @@ class Browser:
 
         return dest
 
+    def download_from_url(
+        self, url, dest=None, channel=None, rename=None, default_name="download"
+    ):
+        """Download a URL into a dest/channel
+        :param url: The URL to download
+        :param dest: Directory in which to put the dowloaded
+        :param channel: Browser channel to append to the dest
+        :param rename: Optional name for the download; the original extension
+                       is preserved
+        :param default_name: The default name for the download if none is
+                             provided and none can be found from the network
+        :return: The path to the downloaded package/installer
+        """
+        self.logger.info("Downloading from %s" % url)
+
+        dest = self._get_browser_binary_dir(dest, channel)
+
+        resp = get(url)
+        filename = get_download_filename(resp, default_name)
+        if rename:
+            filename = "%s%s" % (rename, get_ext(filename))
+
+        output_path = os.path.join(dest, filename)
+
+        with open(output_path, "wb") as f:
+            for chunk in resp.iter_content(chunk_size=64 * 1024):
+                f.write(chunk)
+
+        return output_path
+
     @abstractmethod
     def download(self, dest=None, channel=None, rename=None):
         """Download a package or installer for the browser
@@ -1891,23 +1921,108 @@ class WebKitTestRunner(Browser):
     product = "wktr"
     requirements = None
 
-    def download(self, dest=None, channel=None, rename=None):
+    def _find_apple_port_builds(self, channel="main"):
+        if channel != "main":
+            raise ValueError(f"unable to get builds for branch {channel}")
+
+        system_version, _, _ = platform.mac_ver()
+        if system_version in SpecifierSet("==13.*"):
+            platform_key = "mac-ventura-x86_64%20arm64"
+        elif system_version in SpecifierSet("==12.*"):
+            platform_key = "mac-monterey-x86_64%20arm64"
+        else:
+            raise ValueError(
+                f"don't know what platform to use for macOS {system_version}"
+            )
+
+        # This should match http://github.com/WebKit/WebKit/blob/main/Websites/webkit.org/wp-content/themes/webkit/build-archives.php
+        build_index = get(
+            f"https://q1tzqfy48e.execute-api.us-west-2.amazonaws.com/v3/latest/{platform_key}-release"
+        ).json()
+
+        builds = []
+
+        for entry in build_index["Items"]:
+            creation_time = datetime.fromtimestamp(
+                int(entry["creationTime"]["N"]), timezone.utc
+            )
+            identifier = entry["identifier"]["S"]
+            s3_url = entry["s3_url"]["S"]
+
+            builds.append((s3_url, identifier, creation_time))
+
+        return builds
+
+    def _download_metadata_apple_port(self, channel="main"):
+        digit_re = re.compile("([0-9]+)")
+
+        def natsort(string_to_split):
+            split = digit_re.split(string_to_split)
+            # this converts the split numbers into tuples so that "01" < "1"
+            split[1::2] = [(int(i), i) for i in split[1::2]]
+            return split
+
+        builds = sorted(
+            self._find_apple_port_builds(channel),
+            key=lambda x: natsort(x[1]),
+            reverse=True,
+        )
+        latest_build = builds[0]
+
+        return {
+            "url": latest_build[0],
+            "identifier": latest_build[1],
+            "creation_time": latest_build[2],
+        }
+
+    def download(
+        self, dest=None, channel="main", rename=None, version=None, revision=None
+    ):
+        if platform.system() == "Darwin":
+            meta = self._download_metadata_apple_port(channel)
+        else:
+            raise ValueError("Unsupported platform")
+
+        output_path = self.download_from_url(
+            meta["url"],
+            dest=dest,
+            channel=channel,
+            rename=rename,
+        )
+
+        dest = os.path.dirname(output_path)  # This is the actual, used dest.
+
+        self.last_revision_used = meta["identifier"]
+        with open(os.path.join(dest, "identifier"), "w") as f:
+            f.write(self.last_revision_used)
+
+        return output_path
+
+    def install(self, dest=None, channel="main"):
+        dest = self._get_browser_binary_dir(dest, channel)
+        installer_path = self.download(dest=dest, channel=channel)
+        self.logger.info(f"Extracting to {dest}")
+        with open(installer_path, "rb") as f:
+            unzip(f, dest)
+
+    def install_webdriver(self, dest=None, channel="main", browser_binary=None):
         raise NotImplementedError
 
-    def install(self, dest=None, channel=None):
-        raise NotImplementedError
+    def find_binary(self, venv_path=None, channel="main"):
+        path = self._get_browser_binary_dir(venv_path, channel)
+        return find_executable("WebKitTestRunner", os.path.join(path, "Release"))
 
-    def install_webdriver(self, dest=None, channel=None, browser_binary=None):
-        raise NotImplementedError
-
-    def find_binary(self, venv_path=None, channel=None):
-        return None
-
-    def find_webdriver(self, venv_path=None, channel=None):
+    def find_webdriver(self, venv_path=None, channel="main"):
         return None
 
     def version(self, binary=None, webdriver_binary=None):
-        return None
+        dirname = os.path.dirname(binary)
+        identifier = os.path.join(dirname, "identifier")
+        if not os.path.exists(identifier):
+            return None
+
+        with open(identifier, "r") as f:
+            return f.read().strip()
 
 
 class WebKitGTKMiniBrowser(WebKit):
diff --git a/tests/wpt/web-platform-tests/tools/wpt/install.py b/tests/wpt/web-platform-tests/tools/wpt/install.py
index 821ce86f97f..5bcbb7a7c33 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/install.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/install.py
@@ -13,7 +13,8 @@ latest_channels = {
     'edgechromium': 'dev',
     'safari': 'preview',
     'servo': 'nightly',
-    'webkitgtk_minibrowser': 'nightly'
+    'webkitgtk_minibrowser': 'nightly',
+    'wktr': 'main',
 }
 
 channel_by_name = {
@@ -44,7 +45,7 @@ def get_parser():
     parser = argparse.ArgumentParser(
         parents=[channel_args],
         description="Install a given browser or webdriver frontend.")
-    parser.add_argument('browser', choices=['firefox', 'chrome', 'chromium', 'servo', 'safari'],
+    parser.add_argument('browser', choices=['firefox', 'chrome', 'chromium', 'servo', 'safari', 'wktr'],
                         help='name of web browser product')
     parser.add_argument('component', choices=['browser', 'webdriver'],
                         help='name of component')
@@ -107,7 +108,12 @@ def install(name, component, destination, channel="nightly", logger=None, downlo
 
     method = prefix + suffix
 
-    browser_cls = getattr(browser, name.title())
+    if name == "wktr":
+        canonical_name = "WebKitTestRunner"
+    else:
+        canonical_name = name.title()
+
+    browser_cls = getattr(browser, canonical_name)
     logger.info('Now installing %s %s...', name, component)
     kwargs = {}
     if download_only and rename:
diff --git a/tests/wpt/web-platform-tests/tools/wpt/run.py b/tests/wpt/web-platform-tests/tools/wpt/run.py
index 0b7d73b2042..72ceab08b97 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/run.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/run.py
@@ -265,6 +265,9 @@ Consider installing certutil via your OS package manager or directly.""")
             kwargs["headless"] = True
             logger.info("Running in headless mode, pass --no-headless to disable")
 
+        if kwargs["browser_channel"] == "nightly" and kwargs["enable_webtransport_h3"] is None:
+            kwargs["enable_webtransport_h3"] = True
+
         # Turn off Firefox WebRTC ICE logging on WPT (turned on by mozrunner)
         safe_unsetenv('R_LOG_LEVEL')
         safe_unsetenv('R_LOG_DESTINATION')
@@ -691,10 +694,16 @@ class WebKitTestRunner(BrowserSetup):
     browser_cls = browser.WebKitTestRunner
 
     def install(self, channel=None):
-        raise NotImplementedError
+        if self.prompt_install(self.name):
+            return self.browser.install(self.venv.path, channel=channel)
 
     def setup_kwargs(self, kwargs):
-        pass
+        if kwargs["binary"] is None:
+            binary = self.browser.find_binary(self.venv.path, channel=kwargs["browser_channel"])
+
+            if binary is None:
+                raise WptrunError("Unable to find binary in PATH")
+            kwargs["binary"] = binary
 
 
 class WebKitGTKMiniBrowser(BrowserSetup):
diff --git a/tests/wpt/web-platform-tests/tools/wpt/tests/test_update_expectations.py b/tests/wpt/web-platform-tests/tools/wpt/tests/test_update_expectations.py
index 1635dce7ec6..184cd7247b3 100644
--- a/tests/wpt/web-platform-tests/tools/wpt/tests/test_update_expectations.py
+++ b/tests/wpt/web-platform-tests/tools/wpt/tests/test_update_expectations.py
@@ -6,8 +6,8 @@ import os
 import pytest
 
 from tools.wpt import wpt
-from tools.wptrunner.wptrunner import manifestexpected
-from tools.wptrunner.wptrunner.manifestupdate import get_test_name
+from wptrunner import manifestexpected
+from wptrunner.manifestupdate import get_test_name
 from localpaths import repo_root
 
 @pytest.fixture
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
index ccf09be728d..bfd21934d99 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements.txt
@@ -1,9 +1,9 @@
 html5lib==1.1
 mozdebug==0.3.0
 mozinfo==1.2.2  # https://bugzilla.mozilla.org/show_bug.cgi?id=1621226
-mozlog==7.1.0
+mozlog==7.1.1
 mozprocess==1.3.0
-pillow==8.4.0
+pillow==9.4.0
 requests==2.28.2
 six==1.16.0
 urllib3[secure]==1.26.15
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_firefox.txt b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_firefox.txt
index 64546d55314..0b51ee8f463 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/requirements_firefox.txt
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/requirements_firefox.txt
@@ -1,5 +1,5 @@
-marionette_driver==3.1.0
-mozcrash==2.1.0
+marionette_driver==3.2.0
+mozcrash==2.2.0
 mozdevice==4.1.0
 mozinstall==2.0.1
 mozleak==0.2
@@ -7,3 +7,4 @@ mozprofile==2.5.0
 mozrunner==8.2.1
 mozversion==2.3.0
 psutil==5.9.4
+redo==2.0.4
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/formatters/chromium.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/formatters/chromium.py
index eca63d136bb..95f53011bfc 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/formatters/chromium.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/formatters/chromium.py
@@ -258,6 +258,8 @@ class ChromiumFormatter(base.BaseFormatter):  # type: ignore
     def suite_start(self, data):
         if self.start_timestamp_seconds is None:
             self.start_timestamp_seconds = self._get_time(data)
+        if 'run_info' in data:
+            self.flag_specific = data['run_info'].get('flag_specific', '')
 
     def test_start(self, data):
         test_name = data["test"]
@@ -325,6 +327,7 @@ class ChromiumFormatter(base.BaseFormatter):  # type: ignore
             "version": 3,
             "seconds_since_epoch": self.start_timestamp_seconds,
             "num_failures_by_type": self.num_failures_by_status,
+            "flag_name": self.flag_specific,
             "tests": self.tests
         }
         return json.dumps(final_result)
diff --git a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/tests/test_update.py b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/tests/test_update.py
index 35c75758f53..6cbe335cfe7 100644
--- a/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/tests/test_update.py
+++ b/tests/wpt/web-platform-tests/tools/wptrunner/wptrunner/tests/test_update.py
@@ -3,7 +3,7 @@
 import json
 import os
 import sys
-from io import BytesIO
+from io import BytesIO, StringIO
 from unittest import mock
 
 import pytest
@@ -116,7 +116,7 @@ def create_updater(tests, url_base="/", **kwargs):
 
 
 def create_log(entries):
-    data = BytesIO()
+    data = StringIO()
     if isinstance(entries, list):
         logger = structuredlog.StructuredLogger("expected_test")
         handler = handlers.StreamHandler(data, formatters.JSONFormatter())
@@ -127,7 +127,7 @@ def create_log(entries):
             getattr(logger, action)(**kwargs)
         logger.remove_handler(handler)
     else:
-        data.write(json.dumps(entries).encode())
+        data.write(json.dumps(entries))
     data.seek(0)
     return data
 
diff --git a/tests/wpt/web-platform-tests/tools/wptserve/tests/functional/base.py b/tests/wpt/web-platform-tests/tools/wptserve/tests/functional/base.py
index be5dc0d102c..f47308d88df 100644
--- a/tests/wpt/web-platform-tests/tools/wptserve/tests/functional/base.py
+++ b/tests/wpt/web-platform-tests/tools/wptserve/tests/functional/base.py
@@ -95,6 +95,7 @@ class TestUsingH2Server:
                                    http2=True, verify=False)
 
     def teardown_method(self, test_method):
+        self.client.close()
         self.server.stop()
 
 
diff --git a/tests/wpt/web-platform-tests/trust-tokens/trust-token-parameter-validation-xhr.tentative.https.html b/tests/wpt/web-platform-tests/trust-tokens/trust-token-parameter-validation-xhr.tentative.https.html
index 73af4634b6d..883c438fa93 100644
--- a/tests/wpt/web-platform-tests/trust-tokens/trust-token-parameter-validation-xhr.tentative.https.html
+++ b/tests/wpt/web-platform-tests/trust-tokens/trust-token-parameter-validation-xhr.tentative.https.html
@@ -10,7 +10,6 @@
     assert_throws_dom("InvalidStateError", () => {
       let request = new XMLHttpRequest();
       request.setPrivateToken({
-        type: 'private-state-token',
         version: 1,
         operation: 'token-request'
       });
@@ -23,37 +22,17 @@
       request.open('GET', 'https://privatetoken.example');
       request.send();
       request.setPrivateToken({
-        type: 'private-state-token',
         version: 1,
         operation: 'token-request'
       });
     });
   }, 'Setting XHR Private Token parameters requires that the XHR request not have been sent.');
 
-  test(() => {
-    assert_throws_js(TypeError, () => {
-      let request = new XMLHttpRequest();
-      request.open('GET', 'https://privatetoken.example');
-      request.setPrivateToken({});
-    });
-  }, 'Private Token operations require present `type` values.');
-
   test(() => {
     assert_throws_js(TypeError, () => {
       let request = new XMLHttpRequest();
       request.open('GET', 'https://privatetoken.example');
       request.setPrivateToken({
-        type: "invalid"
-      });
-    });
-  }, 'Private Token operations require valid `type` values.');
-
-  test(() => {
-    assert_throws_js(TypeError, () => {
-      let request = new XMLHttpRequest();
-      request.open('GET', 'https://privatetoken.example');
-      request.setPrivateToken({
-        type: "private-state-token",
         version: 1,
         operation: "token-request",
         refreshPolicy: "not a member of the refreshPolicy enum",
@@ -66,7 +45,6 @@
       let request = new XMLHttpRequest();
       request.open('GET', 'https://privatetoken.example');
       request.setPrivateToken({
-        type: "private-state-token",
         version: 1,
         operation: "send-redemption-record",
         issuers: []
@@ -79,7 +57,6 @@
       let request = new XMLHttpRequest();
       request.open('GET', 'https://privatetoken.example');
       request.setPrivateToken({
-        type: "private-state-token",
         version: 1,
         operation: "send-redemption-record",
         issuers: [3]
@@ -92,7 +69,6 @@
       let request = new XMLHttpRequest();
       request.open('GET', 'https://privatetoken.example');
       request.setPrivateToken({
-        type: "private-state-token",
         version: 1,
         operation: "send-redemption-record",
         issuers: ["not a valid URL"]
@@ -105,7 +81,6 @@
       let request = new XMLHttpRequest();
       request.open('GET', 'https://privatetoken.example');
       request.setPrivateToken({
-        type: "private-state-token",
         version: 1,
         operation: "send-redemption-record",
         issuers: ["http://not-secure.com"]
@@ -117,7 +92,6 @@
     let request = new XMLHttpRequest();
     request.open('GET', 'https://privatetoken.example');
     request.setPrivateToken({
-      type: "private-state-token",
       version: 1,
       operation: "send-redemption-record",
       issuers: ["http://localhost"]
diff --git a/tests/wpt/web-platform-tests/trust-tokens/trust-token-parameter-validation.tentative.https.html b/tests/wpt/web-platform-tests/trust-tokens/trust-token-parameter-validation.tentative.https.html
index e2ab079434b..cf24b232e83 100644
--- a/tests/wpt/web-platform-tests/trust-tokens/trust-token-parameter-validation.tentative.https.html
+++ b/tests/wpt/web-platform-tests/trust-tokens/trust-token-parameter-validation.tentative.https.html
@@ -6,29 +6,10 @@
 <script>
   'use strict';
 
-  test(() => {
-    assert_throws_js(TypeError, () => {
-      new Request('https://example.com', {
-        privateToken: {}
-      });
-    });
-  }, 'Private Token fetches require present `type` values.');
-
   test(() => {
     assert_throws_js(TypeError, () => {
       new Request('https://example.com', {
         privateToken: {
-          type: "invalid"
-        }
-      });
-    });
-  }, 'Private Token fetches require valid `type` values.');
-
-  test(() => {
-    assert_throws_js(TypeError, () => {
-      new Request('https://example.com', {
-        privateToken: {
-          type: "private-state-token",
           version: 1,
           operation: "token-request",
           refreshPolicy: "not a member of the refreshPolicy enum",
@@ -41,7 +22,6 @@
     assert_throws_js(TypeError, () => {
       new Request('https://example.com', {
         privateToken: {
-          type: "private-state-token",
           version: 1,
           operation: "send-redemption-record",
           issuers: []
@@ -54,7 +34,6 @@
     assert_throws_js(TypeError, () => {
       new Request('https://example.com', {
         privateToken: {
-          type: "private-state-token",
           version: 1,
           operation: "send-redemption-record",
           issuers: [3]
@@ -67,7 +46,6 @@
     assert_throws_js(TypeError, () => {
       new Request('https://example.com', {
         privateToken: {
-          type: "private-state-token",
           version: 1,
           operation: "send-redemption-record",
           issuers: ["not a valid URL"]
@@ -80,7 +58,6 @@
     assert_throws_js(TypeError, () => {
       new Request('https://example.com', {
         privateToken: {
-          type: "private-state-token",
           version: 1,
           operation: "send-redemption-record",
           issuers: ["http://not-secure.com"]
@@ -92,7 +69,6 @@
   test(() => {
     new Request('https://example.com', {
       privateToken: {
-        type: "private-state-token",
         version: 1,
         operation: "send-redemption-record",
         issuers: ["http://localhost"]
diff --git a/tests/wpt/web-platform-tests/webcodecs/video-encoder.https.any.js b/tests/wpt/web-platform-tests/webcodecs/video-encoder.https.any.js
index b5c511d4062..229ae32edd4 100644
--- a/tests/wpt/web-platform-tests/webcodecs/video-encoder.https.any.js
+++ b/tests/wpt/web-platform-tests/webcodecs/video-encoder.https.any.js
@@ -295,7 +295,7 @@ promise_test(async t => {
 
   encoder.configure(defaultConfig);
 
-  assert_throws_dom("OperationError", () => {
+  assert_throws_js(TypeError, () => {
     encoder.encode(frame);
   });
 }, 'Verify encoding closed frames throws.');
diff --git a/tests/wpt/web-platform-tests/webcodecs/videoFrame-serialization.crossAgentCluster.https.html b/tests/wpt/web-platform-tests/webcodecs/videoFrame-serialization.crossAgentCluster.https.html
index cb02ad4bcc3..8fe7cf44cc6 100644
--- a/tests/wpt/web-platform-tests/webcodecs/videoFrame-serialization.crossAgentCluster.https.html
+++ b/tests/wpt/web-platform-tests/webcodecs/videoFrame-serialization.crossAgentCluster.https.html
@@ -208,11 +208,11 @@ function createVideoFrame(ts) {
   });
 }
 
-function canSerializeVideoFrame(target, vf, transfer) {
+function canSerializeVideoFrame(target, vf) {
   return canPostVideoFrame(target, vf, false);
 };
 
-function canTransferVideoFrame(target, vf, transfer) {
+function canTransferVideoFrame(target, vf) {
   return canPostVideoFrame(target, vf, true);
 };
 
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/dom_content_loaded/dom_content_loaded.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/dom_content_loaded/dom_content_loaded.py
index 486414aa3cd..9723ee4a4ed 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/dom_content_loaded/dom_content_loaded.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/dom_content_loaded/dom_content_loaded.py
@@ -135,3 +135,14 @@ async def test_document_write(bidi_session, subscribe_events, top_context, wait_
 
     event = await on_entry
     assert_navigation_info(event, {"context": top_context["context"]})
+
+
+async def test_page_with_base_tag(bidi_session, subscribe_events, inline, new_tab, wait_for_event):
+    await subscribe_events(events=[DOM_CONTENT_LOADED_EVENT])
+
+    on_entry = wait_for_event(DOM_CONTENT_LOADED_EVENT)
+    url = inline("""<base href="/relative-path">""")
+    await bidi_session.browsing_context.navigate(context=new_tab["context"], url=url)
+    event = await on_entry
+
+    assert_navigation_info(event, {"context": new_tab["context"], "url": url})
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/load/load.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/load/load.py
index 878d26eaad8..b4b174818cf 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/load/load.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/load/load.py
@@ -124,3 +124,14 @@ async def test_document_write(bidi_session, subscribe_events, top_context, wait_
 
     event = await on_entry
     assert_navigation_info(event, {"context": top_context["context"]})
+
+
+async def test_page_with_base_tag(bidi_session, subscribe_events, inline, new_tab, wait_for_event):
+    await subscribe_events(events=[CONTEXT_LOAD_EVENT])
+
+    on_entry = wait_for_event(CONTEXT_LOAD_EVENT)
+    url = inline("""<base href="/relative-path">""")
+    await bidi_session.browsing_context.navigate(context=new_tab["context"], url=url)
+    event = await on_entry
+
+    assert_navigation_info(event, {"context": new_tab["context"], "url": url})
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/print/page.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/print/page.py
index dd1fbcb9ae7..b66fb9881e5 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/print/page.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/browsing_context/print/page.py
@@ -4,13 +4,20 @@ pytestmark = pytest.mark.asyncio
 
 
 @pytest.mark.parametrize(
-    "page, expected_dimensions",
+    "page, orientation, expected_dimensions",
     [
-        (None, {"width": 21.59, "height": 27.94}),
-        ({}, {"width": 21.59, "height": 27.94}),
-        ({"width": 4.5}, {"width": 4.5, "height": 27.94}),
-        ({"height": 23}, {"width": 21.59, "height": 23}),
-        ({"width": 4.5, "height": 12}, {"width": 4.5, "height": 12}),
+        (None, "portrait", {"width": 21.59, "height": 27.94}),
+        ({}, "portrait",{"width": 21.59, "height": 27.94}),
+        ({"width": 4.5}, "portrait", {"width": 4.5, "height": 27.94}),
+        ({"height": 23}, "portrait", {"width": 21.59, "height": 23}),
+        ({"width": 4.5, "height": 12}, "portrait", {"width": 4.5, "height": 12}),
+        ({"height": 12}, "portrait", {"width": 21.59, "height": 12}),
+        (None, "landscape", {"width": 27.94, "height": 21.59}),
+        ({}, "landscape",{"width": 27.94, "height": 21.59}),
+        ({"width": 4.5}, "landscape", {"width": 27.94, "height": 4.5}),
+        ({"height": 23}, "landscape", {"width": 23, "height": 21.59}),
+        ({"width": 4.5, "height": 12}, "landscape", {"width": 12, "height": 4.5}),
+        ({"height": 12}, "landscape", {"width": 12, "height": 21.59}),
     ],
 )
 async def test_page(
@@ -19,13 +26,14 @@ async def test_page(
     inline,
     assert_pdf_dimensions,
     page,
+    orientation,
     expected_dimensions,
 ):
     await bidi_session.browsing_context.navigate(
         context=top_context["context"], url=inline(""), wait="complete"
     )
     value = await bidi_session.browsing_context.print(
-        context=top_context["context"], page=page, orientation="portrait"
+        context=top_context["context"], page=page, orientation=orientation
     )
 
     await assert_pdf_dimensions(value, expected_dimensions)
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/__init__.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/__init__.py
new file mode 100644
index 00000000000..3aa0c3a19d1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/__init__.py
@@ -0,0 +1,28 @@
+import json
+
+from webdriver.bidi.modules.script import ContextTarget
+
+
+async def get_events(context, bidi_session):
+    """Return list of key events recorded on the test_actions.html page."""
+    events_str = await bidi_session.script.evaluate(
+        expression="JSON.stringify(allEvents.events)",
+        target=ContextTarget(context),
+        await_promise=False,
+    )
+    events = json.loads(events_str["value"])
+
+    # `key` values in `allEvents` may be escaped (see `escapeSurrogateHalf` in
+    # test_actions.html), so this converts them back into unicode literals.
+    for e in events:
+        # example: turn "U+d83d" (6 chars) into u"\ud83d" (1 char)
+        if "key" in e and e["key"].startswith("U+"):
+            key = e["key"]
+            hex_suffix = key[key.index("+") + 1 :]
+            e["key"] = chr(int(hex_suffix, 16))
+
+        # WebKit sets code as 'Unidentified' for unidentified key codes, but
+        # tests expect ''.
+        if "code" in e and e["code"] == "Unidentified":
+            e["code"] = ""
+    return events
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/conftest.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/conftest.py
new file mode 100644
index 00000000000..0ec3174163f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/conftest.py
@@ -0,0 +1,21 @@
+import pytest
+
+from webdriver.bidi.modules.script import ContextTarget
+
+
+@pytest.fixture
+def get_focused_key_input(bidi_session, top_context):
+    """Get focused input element, containing pressed key data."""
+
+    async def get_focused_key_input(context=top_context):
+        return await bidi_session.script.call_function(
+            function_declaration="""() => {
+                const elem = document.getElementById("keys");
+                elem.focus();
+                return elem;
+            }""",
+            target=ContextTarget(context["context"]),
+            await_promise=False,
+        )
+
+    return get_focused_key_input
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/__init__.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/__init__.py
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/invalid.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/invalid.py
new file mode 100644
index 00000000000..4dee9e33654
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/invalid.py
@@ -0,0 +1,22 @@
+import pytest
+
+from webdriver.bidi.modules.input import Actions
+from webdriver.bidi.error import InvalidArgumentException, NoSuchFrameException
+
+
+pytestmark = pytest.mark.asyncio
+
+
+@pytest.mark.parametrize("value", [None, True, 42, {}, []])
+async def test_params_context_invalid_type(bidi_session, value):
+    actions = Actions()
+    actions.add_key()
+    with pytest.raises(InvalidArgumentException):
+        await bidi_session.input.perform_actions(actions=actions, context=value)
+
+
+async def test_params_contexts_value_invalid_value(bidi_session):
+    actions = Actions()
+    actions.add_key()
+    with pytest.raises(NoSuchFrameException):
+        await bidi_session.input.perform_actions(actions=actions, context="foo")
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/key_events.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/key_events.py
index 65f54ed7b38..e222776d1f9 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/key_events.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/perform_actions/key_events.py
@@ -1,38 +1,14 @@
-import json
-
 import pytest
 
 from webdriver.bidi.modules.input import Actions
 from webdriver.bidi.modules.script import ContextTarget
 
-from tests.support.helpers import filter_dict
+from tests.support.helpers import filter_supported_key_events
+from .. import get_events
 
 pytestmark = pytest.mark.asyncio
 
 
-async def get_events(context, bidi_session):
-    """Return list of key events recorded in the test_keys_page fixture."""
-    events_str = await bidi_session.script.evaluate(expression="JSON.stringify(allEvents.events)",
-                                                    target=ContextTarget(context),
-                                                    await_promise=False)
-    events = json.loads(events_str["value"])
-
-    # `key` values in `allEvents` may be escaped (see `escapeSurrogateHalf` in
-    # test_actions.html), so this converts them back into unicode literals.
-    for e in events:
-        # example: turn "U+d83d" (6 chars) into u"\ud83d" (1 char)
-        if "key" in e and e["key"].startswith(u"U+"):
-            key = e["key"]
-            hex_suffix = key[key.index("+") + 1:]
-            e["key"] = chr(int(hex_suffix, 16))
-
-        # WebKit sets code as 'Unidentified' for unidentified key codes, but
-        # tests expect ''.
-        if "code" in e and e["code"] == "Unidentified":
-            e["code"] = ""
-    return events
-
-
 @pytest.mark.parametrize("value,code", [
     (u"a", "KeyA",),
     ("a", "KeyA",),
@@ -44,20 +20,11 @@ async def get_events(context, bidi_session):
     (u"\u2603", ""),
     (u"\uF6C2", ""),  # PUA
 ])
-async def test_printable_key_sends_correct_events(bidi_session, top_context, url, value, code):
-    await bidi_session.browsing_context.navigate(
-        context=top_context["context"],
-        url=url("/webdriver/tests/support/html/test_actions.html"),
-        wait="complete"
-    )
-    await bidi_session.script.call_function(function_declaration="""
-() => {
-  let elem = document.getElementById("keys");
-  elem.focus();
-  resetEvents();
-}""",
-                                           target=ContextTarget(top_context["context"]),
-                                           await_promise=False)
+async def test_printable_key_sends_correct_events(
+    bidi_session, top_context, test_actions_page_bidi, get_focused_key_input, value, code
+):
+    await test_actions_page_bidi()
+    elem = await get_focused_key_input()
 
     actions = Actions()
     (actions.add_key()
@@ -74,19 +41,15 @@ async def test_printable_key_sends_correct_events(bidi_session, top_context, url
         {"code": code, "key": value, "type": "keyup"},
     ]
 
-    events = [filter_dict(e, expected[0]) for e in all_events]
-    if len(events) > 0 and events[0]["code"] is None:
-        # Remove 'code' entry if browser doesn't support it
-        expected = [filter_dict(e, {"key": "", "type": ""}) for e in expected]
-        events = [filter_dict(e, expected[0]) for e in events]
+    (events, expected) = filter_supported_key_events(all_events, expected)
     assert events == expected
 
     keys_value = await bidi_session.script.call_function(function_declaration="""
-() => {
-  let elem = document.getElementById("keys");
+(elem) => {
   return elem.value
 }""",
                                                         target=ContextTarget(top_context["context"]),
+                                                        arguments=[elem],
                                                         await_promise=False)
 
     assert keys_value["value"] == value
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/__init__.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/__init__.py
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/context.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/context.py
new file mode 100644
index 00000000000..0cb407606d4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/context.py
@@ -0,0 +1,42 @@
+import pytest
+from webdriver.bidi.modules.input import Actions
+from webdriver.bidi.modules.script import ContextTarget
+
+from tests.support.helpers import filter_supported_key_events
+from .. import get_events
+
+pytestmark = pytest.mark.asyncio
+
+
+async def test_different_top_level_contexts(
+    bidi_session, new_tab, top_context, test_actions_page_bidi, get_focused_key_input
+):
+    await test_actions_page_bidi()
+    await get_focused_key_input()
+
+    actions = Actions()
+    actions.add_key().key_down("a")
+    await bidi_session.input.perform_actions(
+        actions=actions, context=top_context["context"]
+    )
+    # Reset so we only see the release events
+    await bidi_session.script.evaluate(
+        expression="resetEvents()",
+        target=ContextTarget(top_context["context"]),
+        await_promise=False,
+    )
+    # Release actions in another context
+    await bidi_session.input.release_actions(context=new_tab["context"])
+
+    events = await get_events(top_context["context"], bidi_session)
+    assert len(events) == 0
+
+    # Release actions in right context
+    await bidi_session.input.release_actions(context=top_context["context"])
+
+    expected = [
+        {"code": "KeyA", "key": "a", "type": "keyup"},
+    ]
+    all_events = await get_events(top_context["context"], bidi_session)
+    (events, expected) = filter_supported_key_events(all_events, expected)
+    assert events == expected
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/invalid.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/invalid.py
new file mode 100644
index 00000000000..2adc0aa9538
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/invalid.py
@@ -0,0 +1,16 @@
+import pytest
+from webdriver.bidi.error import InvalidArgumentException, NoSuchFrameException
+
+
+pytestmark = pytest.mark.asyncio
+
+
+@pytest.mark.parametrize("value", [None, True, 42, {}, []])
+async def test_params_context_invalid_type(bidi_session, value):
+    with pytest.raises(InvalidArgumentException):
+        await bidi_session.input.release_actions(context=value)
+
+
+async def test_params_contexts_value_invalid_value(bidi_session):
+    with pytest.raises(NoSuchFrameException):
+        await bidi_session.input.release_actions(context="foo")
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/release.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/release.py
new file mode 100644
index 00000000000..c4990b702ae
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/release.py
@@ -0,0 +1,28 @@
+import pytest
+from webdriver.bidi.modules.script import ContextTarget
+
+from .. import get_events
+
+pytestmark = pytest.mark.asyncio
+
+
+async def test_release_no_actions_sends_no_events(
+    bidi_session, top_context, test_actions_page_bidi, get_focused_key_input
+):
+    await test_actions_page_bidi()
+    elem = await get_focused_key_input()
+
+    await bidi_session.input.release_actions(context=top_context["context"])
+
+    keys = await bidi_session.script.call_function(
+        function_declaration="""(elem) => {
+            return elem.value;
+        }""",
+        arguments=[elem],
+        target=ContextTarget(top_context["context"]),
+        await_promise=False,
+    )
+    events = await get_events(top_context["context"], bidi_session)
+
+    assert len(keys["value"]) == 0
+    assert len(events) == 0
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/sequence.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/sequence.py
new file mode 100644
index 00000000000..bd1d7752303
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/input/release_actions/sequence.py
@@ -0,0 +1,84 @@
+import pytest
+from webdriver.bidi.modules.input import Actions
+from webdriver.bidi.modules.script import ContextTarget
+
+from tests.support.helpers import filter_dict, filter_supported_key_events
+from .. import get_events
+
+pytestmark = pytest.mark.asyncio
+
+
+async def test_release_char_sequence_sends_keyup_events_in_reverse(
+    bidi_session, top_context, test_actions_page_bidi, get_focused_key_input
+):
+    await test_actions_page_bidi()
+    await get_focused_key_input()
+
+    actions = Actions()
+    actions.add_key().key_down("a").key_down("b")
+    await bidi_session.input.perform_actions(
+        actions=actions, context=top_context["context"]
+    )
+    # Reset so we only see the release events
+    await bidi_session.script.evaluate(
+        expression="resetEvents()",
+        target=ContextTarget(top_context["context"]),
+        await_promise=False,
+    )
+    await bidi_session.input.release_actions(context=top_context["context"])
+    expected = [
+        {"code": "KeyB", "key": "b", "type": "keyup"},
+        {"code": "KeyA", "key": "a", "type": "keyup"},
+    ]
+    all_events = await get_events(top_context["context"], bidi_session)
+    (events, expected) = filter_supported_key_events(all_events, expected)
+    assert events == expected
+
+
+@pytest.mark.parametrize(
+    "release_actions",
+    [True, False],
+    ids=["with release actions", "without release actions"],
+)
+async def test_release_mouse_sequence_resets_dblclick_state(
+    bidi_session,
+    top_context,
+    test_actions_page_bidi,
+    release_actions
+):
+    await test_actions_page_bidi()
+    reporter = await bidi_session.script.evaluate(
+        expression="document.querySelector('#outer')",
+        target=ContextTarget(top_context["context"]),
+        await_promise=False,
+    )
+    actions = Actions()
+    actions.add_pointer(pointer_type="mouse").pointer_move(
+        x=0, y=0, origin=reporter["value"]
+    ).pointer_down(button=0).pointer_up(button=0)
+    await bidi_session.input.perform_actions(
+        actions=actions, context=top_context["context"]
+    )
+
+    if release_actions:
+        await bidi_session.input.release_actions(context=top_context["context"])
+
+    await bidi_session.input.perform_actions(
+        actions=actions, context=top_context["context"]
+    )
+    events = await get_events(top_context["context"], bidi_session)
+
+    expected = [
+        {"type": "mousedown", "button": 0},
+        {"type": "mouseup", "button": 0},
+        {"type": "click", "button": 0},
+        {"type": "mousedown", "button": 0},
+        {"type": "mouseup", "button": 0},
+        {"type": "click", "button": 0},
+    ]
+
+    if not release_actions:
+        expected.append({"type": "dblclick", "button": 0})
+
+    filtered_events = [filter_dict(e, expected[0]) for e in events]
+    assert expected == filtered_events[1:]
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/network/conftest.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/network/conftest.py
index e6ca1f999b0..21a037a0f77 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/network/conftest.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/network/conftest.py
@@ -11,25 +11,30 @@ PAGE_EMPTY_HTML = "/webdriver/tests/bidi/network/support/empty.html"
 
 
 @pytest.fixture
-def fetch(bidi_session, top_context):
+def fetch(bidi_session, top_context, configuration):
     """Perform a fetch from the page of the provided context, default to the
     top context.
     """
-    async def fetch(url, method="GET", headers=None, context=top_context):
+    async def fetch(url, method="GET", headers=None, context=top_context, timeout_in_seconds=1):
         method_arg = f"method: '{method}',"
 
         headers_arg = ""
         if headers != None:
             headers_arg = f"headers: {json.dumps(headers)},"
 
+        timeout_in_seconds = timeout_in_seconds * configuration["timeout_multiplier"]
+
         # Wait for fetch() to resolve a response and for response.text() to
         # resolve as well to make sure the request/response is completed when
         # the helper returns.
         await bidi_session.script.evaluate(
             expression=f"""
+                 const controller = new AbortController();
+                 setTimeout(() => controller.abort(), {timeout_in_seconds * 1000});
                  fetch("{url}", {{
                    {method_arg}
                    {headers_arg}
+                   signal: controller.signal
                  }}).then(response => response.text());""",
             target=ContextTarget(context["context"]),
             await_promise=True,
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/call_function/invalid.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/call_function/invalid.py
index d73705c6724..015fd40cf90 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/call_function/invalid.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/call_function/invalid.py
@@ -118,6 +118,21 @@ async def test_params_arguments_handle_invalid_type(
             target=ContextTarget(top_context["context"]))
 
 
+async def test_params_arguments_handle_unknown_value(
+    bidi_session, top_context
+):
+    serialized_value = {
+        "handle": "foo",
+    }
+
+    with pytest.raises(error.NoSuchHandleException):
+        await bidi_session.script.call_function(
+            function_declaration="(arg) => arg",
+            arguments=[serialized_value],
+            await_promise=False,
+            target=ContextTarget(top_context["context"]))
+
+
 @pytest.mark.parametrize("value", [None, False, 42, {}, []])
 async def test_params_arguments_sharedId_invalid_type(
     bidi_session, top_context, value
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/disown/handles.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/disown/handles.py
index d4a51457662..e1226463a5c 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/disown/handles.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/disown/handles.py
@@ -27,7 +27,7 @@ async def test_basic_handle(bidi_session, top_context, call_function):
         handles=[remote_value["handle"]], target=ContextTarget(top_context["context"])
     )
 
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.a", [remote_value])
 
 
@@ -67,10 +67,10 @@ async def test_multiple_handles_for_different_objects(
     )
 
     # using handle a or b should raise an exception
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.a", [remote_value_a])
 
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.b", [remote_value_b])
 
     # remote value c should still work
@@ -84,7 +84,7 @@ async def test_multiple_handles_for_different_objects(
     )
 
     # using handle c should raise an exception
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.c", [remote_value_c])
 
 
@@ -126,7 +126,7 @@ async def test_multiple_handles_for_same_object(
     )
 
     # Using handle 1 should raise an exception
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.a", [remote_value1])
 
     # Using handle 2 should still work
@@ -139,7 +139,7 @@ async def test_multiple_handles_for_same_object(
     )
 
     # Using handle 2 should raise an exception
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.a", [remote_value2])
 
 
@@ -169,5 +169,5 @@ async def test_unknown_handle(bidi_session, top_context, call_function):
         target=ContextTarget(top_context["context"]),
     )
 
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.a", [remote_value])
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/disown/target.py b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/disown/target.py
index d8439c2be3d..67d857a0414 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/disown/target.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/bidi/script/disown/target.py
@@ -29,7 +29,7 @@ async def test_realm(bidi_session, top_context, call_function):
         target=RealmTarget(remote_value["realm"]),
     )
 
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.a", [remote_value["result"]])
 
 
@@ -83,7 +83,7 @@ async def test_sandbox(bidi_session, top_context, call_function):
         target=ContextTarget(top_context["context"], "basic_sandbox"),
     )
 
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.a", [sandbox_value], sandbox="basic_sandbox")
 
     # Disown the non-sandboxed remote value from the top context
@@ -91,5 +91,5 @@ async def test_sandbox(bidi_session, top_context, call_function):
         handles=[remote_value["handle"]], target=ContextTarget(top_context["context"])
     )
 
-    with pytest.raises(error.InvalidArgumentException):
+    with pytest.raises(error.NoSuchHandleException):
         await call_function("arg => arg.a", [remote_value], sandbox="basic_sandbox")
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/perform_actions/conftest.py b/tests/wpt/web-platform-tests/webdriver/tests/perform_actions/conftest.py
index f28fb06ce29..30069a02386 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/perform_actions/conftest.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/perform_actions/conftest.py
@@ -69,7 +69,7 @@ def release_actions(session, request):
 
 @pytest.fixture
 def key_reporter(session, test_actions_page, request):
-    """Represents focused input element from `test_keys_page` fixture."""
+    """Represents focused input element from `test_actions_page` fixture."""
     input_el = session.find.css("#keys", all=False)
     input_el.click()
     session.execute_script("resetEvents();")
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/perform_actions/key_events.py b/tests/wpt/web-platform-tests/webdriver/tests/perform_actions/key_events.py
index 8dbe024d183..9f912684c76 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/perform_actions/key_events.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/perform_actions/key_events.py
@@ -6,7 +6,7 @@ import pytest
 
 from tests.perform_actions.support.keys import ALL_EVENTS, Keys, ALTERNATIVE_KEY_NAMES
 from tests.perform_actions.support.refine import get_events, get_keys
-from tests.support.helpers import filter_dict
+from tests.support.helpers import filter_dict, filter_supported_key_events
 
 
 def test_keyup_only_sends_no_events(session, key_reporter, key_chain):
@@ -48,11 +48,7 @@ def test_modifier_key_sends_correct_events(session, key_reporter, key_chain, key
         {"code": code, "key": value, "type": "keyup"},
     ]
 
-    events = [filter_dict(e, expected[0]) for e in all_events]
-    if len(events) > 0 and events[0]["code"] is None:
-        # Remove 'code' entry if browser doesn't support it
-        expected = [filter_dict(e, {"key": "", "type": ""}) for e in expected]
-        events = [filter_dict(e, expected[0]) for e in events]
+    (events, expected) = filter_supported_key_events(all_events, expected)
     assert events == expected
 
     assert len(get_keys(key_reporter)) == 0
@@ -85,12 +81,8 @@ def test_non_printable_key_sends_events(session, key_reporter, key_chain, key, e
         alt_expected[0]["key"] = ALTERNATIVE_KEY_NAMES[event]
         alt_expected[2]["key"] = ALTERNATIVE_KEY_NAMES[event]
 
-    events = [filter_dict(e, expected[0]) for e in all_events]
-    if len(events) > 0 and events[0]["code"] is None:
-        # Remove 'code' entry if browser doesn't support it
-        expected = [filter_dict(e, {"key": "", "type": ""}) for e in expected]
-        alt_expected = [filter_dict(e, {"key": "", "type": ""}) for e in alt_expected]
-        events = [filter_dict(e, expected[0]) for e in events]
+    (_, expected) = filter_supported_key_events(all_events, expected)
+    (events, alt_expected) = filter_supported_key_events(all_events, alt_expected)
     if len(events) == 2:
         # most browsers don't send a keypress for non-printable keys
         assert events == [expected[0], expected[2]] or events == [alt_expected[0], alt_expected[2]]
@@ -124,11 +116,7 @@ def test_printable_key_sends_correct_events(session, key_reporter, key_chain, va
         {"code": code, "key": value, "type": "keyup"},
     ]
 
-    events = [filter_dict(e, expected[0]) for e in all_events]
-    if len(events) > 0 and events[0]["code"] is None:
-        # Remove 'code' entry if browser doesn't support it
-        expected = [filter_dict(e, {"key": "", "type": ""}) for e in expected]
-        events = [filter_dict(e, expected[0]) for e in events]
+    (events, expected) = filter_supported_key_events(all_events, expected)
     assert events == expected
 
     assert get_keys(key_reporter) == value
@@ -148,11 +136,7 @@ def test_sequence_of_keydown_printable_keys_sends_events(session, key_reporter,
         {"code": "KeyB", "key": "b", "type": "keypress"},
     ]
 
-    events = [filter_dict(e, expected[0]) for e in all_events]
-    if len(events) > 0 and events[0]["code"] is None:
-        # Remove 'code' entry if browser doesn't support it
-        expected = [filter_dict(e, {"key": "", "type": ""}) for e in expected]
-        events = [filter_dict(e, expected[0]) for e in events]
+    (events, expected) = filter_supported_key_events(all_events, expected)
     assert events == expected
 
     assert get_keys(key_reporter) == "ab"
@@ -171,11 +155,7 @@ def test_sequence_of_keydown_printable_characters_sends_events(session, key_repo
         {"code": "KeyF", "key": "f", "type": "keyup"},
     ]
 
-    events = [filter_dict(e, expected[0]) for e in all_events]
-    if len(events) > 0 and events[0]["code"] is None:
-        # Remove 'code' entry if browser doesn't support it
-        expected = [filter_dict(e, {"key": "", "type": ""}) for e in expected]
-        events = [filter_dict(e, expected[0]) for e in events]
+    (events, expected) = filter_supported_key_events(all_events, expected)
     assert events == expected
 
     assert get_keys(key_reporter) == "ef"
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/release_actions/conftest.py b/tests/wpt/web-platform-tests/webdriver/tests/release_actions/conftest.py
index 34c8e5de183..8275efc23b7 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/release_actions/conftest.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/release_actions/conftest.py
@@ -28,7 +28,7 @@ def release_actions(session, request):
 
 @pytest.fixture
 def key_reporter(session, test_actions_page, request):
-    """Represents focused input element from `test_keys_page` fixture."""
+    """Represents focused input element from `test_actions_page` fixture."""
     input_el = session.find.css("#keys", all=False)
     input_el.click()
     session.execute_script("resetEvents();")
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/release_actions/sequence.py b/tests/wpt/web-platform-tests/webdriver/tests/release_actions/sequence.py
index 75143d85ca6..24ca16c8604 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/release_actions/sequence.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/release_actions/sequence.py
@@ -1,7 +1,7 @@
 # META: timeout=long
 
 from tests.release_actions.support.refine import get_events, get_keys
-from tests.support.helpers import filter_dict
+from tests.support.helpers import filter_dict, filter_supported_key_events
 
 
 def test_release_no_actions_sends_no_events(session, key_reporter):
@@ -25,11 +25,7 @@ def test_release_char_sequence_sends_keyup_events_in_reverse(session,
         {"code": "KeyA", "key": "a", "type": "keyup"},
     ]
     all_events = get_events(session)
-    events = [filter_dict(e, expected[0]) for e in all_events]
-    if len(events) > 0 and events[0]["code"] is None:
-        # Remove 'code' entry if browser doesn't support it
-        expected = [filter_dict(e, {"key": "", "type": ""}) for e in expected]
-        events = [filter_dict(e, expected[0]) for e in events]
+    (events, expected) = filter_supported_key_events(all_events, expected)
     assert events == expected
 
 
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/release_actions/support/refine.py b/tests/wpt/web-platform-tests/webdriver/tests/release_actions/support/refine.py
index 90f722587c3..d4052097493 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/release_actions/support/refine.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/release_actions/support/refine.py
@@ -1,5 +1,5 @@
 def get_events(session):
-    """Return list of key events recorded in the test_keys_page fixture."""
+    """Return list of key events recorded in the test_actions_page fixture."""
     events = session.execute_script("return allEvents.events;") or []
     # `key` values in `allEvents` may be escaped (see `escapeSurrogateHalf` in
     # test_keys_wdspec.html), so this converts them back into unicode literals.
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/release_actions/support/test_actions_wdspec.html b/tests/wpt/web-platform-tests/webdriver/tests/release_actions/support/test_actions_wdspec.html
deleted file mode 100644
index 6f844cd255a..00000000000
--- a/tests/wpt/web-platform-tests/webdriver/tests/release_actions/support/test_actions_wdspec.html
+++ /dev/null
@@ -1,197 +0,0 @@
-<!doctype html>
-<meta charset=utf-8>
-<html>
-<head>
-    <title>Test Actions</title>
-    <style>
-      div { padding:0px; margin: 0px; }
-      #trackPointer { position: fixed; }
-      #resultContainer { width: 600px; height: 60px; }
-      .area { width: 100px; height: 50px; background-color: #ccc; }
-      .block { width: 5px; height: 5px; border: solid 1px red; }
-      #dragArea { position: relative; }
-      #dragTarget { position: absolute; top:22px; left:47px;}
-    </style>
-    <script>
-        "use strict";
-        var els = {};
-        var allEvents = { events: [] };
-        function displayMessage(message) {
-            document.getElementById("events").innerHTML = "<p>" + message + "</p>";
-        }
-
-        function appendMessage(message) {
-            document.getElementById("events").innerHTML += "<p>" + message + "</p>";
-        }
-
-        /**
-         * Escape |key| if it's in a surrogate-half character range.
-         *
-         * Example: given "\ud83d" return "U+d83d".
-         *
-         * Otherwise JSON.stringify will convert it to U+FFFD (REPLACEMENT CHARACTER)
-         * when returning a value from executeScript, for example.
-         */
-        function escapeSurrogateHalf(key) {
-          if (typeof key !== "undefined" && key.length === 1) {
-            var charCode = key.charCodeAt(0);
-            var highSurrogate = charCode >= 0xD800 && charCode <= 0xDBFF;
-            var surrogate = highSurrogate || (charCode >= 0xDC00 && charCode <= 0xDFFF);
-            if (surrogate) {
-              key = "U+" + charCode.toString(16);
-            }
-          }
-          return key;
-        }
-
-        function recordKeyboardEvent(event) {
-          var key = escapeSurrogateHalf(event.key);
-          allEvents.events.push({
-            "code": event.code,
-            "key": key,
-            "which": event.which,
-            "location": event.location,
-            "ctrl": event.ctrlKey,
-            "meta": event.metaKey,
-            "shift": event.shiftKey,
-            "repeat": event.repeat,
-            "type": event.type
-          });
-          appendMessage(event.type + " " +
-              "code: " + event.code + ", " +
-              "key: " + key + ", " +
-              "which: " + event.which + ", " +
-              "keyCode: " + event.keyCode);
-        }
-
-        function recordPointerEvent(event) {
-          if (event.type === "contextmenu") {
-            event.preventDefault();
-          }
-          allEvents.events.push({
-            "type": event.type,
-            "button": event.button,
-            "buttons": event.buttons,
-            "pageX": event.pageX,
-            "pageY": event.pageY,
-            "ctrlKey": event.ctrlKey,
-            "metaKey": event.metaKey,
-            "altKey": event.altKey,
-            "shiftKey": event.shiftKey,
-            "target": event.target.id
-          });
-          appendMessage(event.type + " " +
-              "button: " + event.button + ", " +
-              "pageX: " + event.pageX + ", " +
-              "pageY: " + event.pageY + ", " +
-              "button: " + event.button + ", " +
-              "buttons: " + event.buttons + ", " +
-              "ctrlKey: " + event.ctrlKey + ", " +
-              "altKey: " + event.altKey + ", " +
-              "metaKey: " + event.metaKey + ", " +
-              "shiftKey: " + event.shiftKey + ", " +
-              "target id: " + event.target.id);
-        }
-
-        function recordFirstPointerMove(event) {
-          recordPointerEvent(event);
-          window.removeEventListener("mousemove", recordFirstPointerMove);
-        }
-
-        function grabOnce(event) {
-          grab(event);
-          els.dragTarget.removeEventListener("mousedown", grabOnce);
-        }
-
-        function dropOnce(moveHandler) {
-          return function (event) {
-            moveHandler(event);
-            els.dragArea.removeEventListener("mouseup", dropOnce);
-          }
-        }
-
-        function resetEvents() {
-          allEvents.events.length = 0;
-          displayMessage("");
-        }
-
-        function drop(moveHandler) {
-          return function (event) {
-            els.dragArea.removeEventListener("mousemove", moveHandler);
-            els.dragTarget.style.backgroundColor = "yellow";
-            els.dragTarget.addEventListener("mousedown", grab);
-            recordPointerEvent(event);
-          };
-        }
-
-        function move(el, offsetX, offsetY, timeout) {
-          return function(event) {
-            setTimeout(function() {
-              el.style.top = event.clientY + offsetY + "px";
-              el.style.left = event.clientX + offsetX + "px";
-            }, timeout);
-          };
-        }
-
-        function grab(event) {
-          event.target.style.backgroundColor = "red";
-          let boxRect = event.target.getBoundingClientRect();
-          let areaRect = event.target.parentElement.getBoundingClientRect();
-          let moveHandler = move(
-              event.target,
-              // coordinates of dragTarget must be relative to dragArea such that
-              // dragTarget remains under the pointer
-              -(areaRect.left + (event.clientX - boxRect.left)),
-              -(areaRect.top + (event.clientY - boxRect.top)),
-              20);
-          els.dragArea.addEventListener("mousemove", moveHandler);
-          els.dragArea.addEventListener("mouseup", dropOnce(drop(moveHandler)));
-        }
-
-        document.addEventListener("DOMContentLoaded", function() {
-          var keyReporter = document.getElementById("keys");
-          keyReporter.addEventListener("keyup", recordKeyboardEvent);
-          keyReporter.addEventListener("keypress", recordKeyboardEvent);
-          keyReporter.addEventListener("keydown", recordKeyboardEvent);
-
-          var outer = document.getElementById("outer");
-          outer.addEventListener("click", recordPointerEvent);
-          outer.addEventListener("dblclick", recordPointerEvent);
-          outer.addEventListener("mousedown", recordPointerEvent);
-          outer.addEventListener("mouseup", recordPointerEvent);
-          outer.addEventListener("contextmenu", recordPointerEvent);
-
-          window.addEventListener("mousemove", recordFirstPointerMove);
-          //visual cue for mousemove
-          var pointer = document.getElementById("trackPointer");
-          window.addEventListener("mousemove", move(pointer, 15, 15, 30));
-          // drag and drop
-          els.dragArea = document.getElementById("dragArea");
-          els.dragTarget = document.getElementById("dragTarget");
-          els.dragTarget.addEventListener("mousedown", grabOnce);
-        });
-    </script>
-</head>
-<body>
-  <div id="trackPointer" class="block"></div>
-  <div>
-    <h2>KeyReporter</h2>
-    <input type="text" id="keys" size="80">
-  </div>
-  <div>
-    <h2>ClickReporter</h2>
-    <div id="outer" class="area">
-    </div>
-  </div>
-  <div>
-    <h2>DragReporter</h2>
-    <div id="dragArea" class="area">
-      <div id="dragTarget" class="block"></div>
-    </div>
-  </div>
-  <div id="resultContainer">
-    <h2>Events</h2>
-    <div id="events"></div>
-  </div>
-</body>
-</html>
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures_bidi.py b/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures_bidi.py
index 9407dc16070..612718b89e5 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures_bidi.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures_bidi.py
@@ -334,3 +334,17 @@ def render_pdf_to_png_bidi(bidi_session, new_tab, url):
         return base64.b64decode(image_string_without_data_type)
 
     return render_pdf_to_png_bidi
+
+
+@pytest.fixture
+def test_actions_page_bidi(bidi_session, url, top_context):
+    """Navigate to test_actions.html."""
+
+    async def test_actions_page_bidi(context=top_context):
+        await bidi_session.browsing_context.navigate(
+            context=context["context"],
+            url=url("/webdriver/tests/support/html/test_actions.html"),
+            wait="complete",
+        )
+
+    return test_actions_page_bidi
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py b/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py
index b0c065dca11..45f4f4d2392 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py
@@ -245,6 +245,16 @@ def filter_dict(source, d):
     return {k: source[k] for k in d.keys()}
 
 
+def filter_supported_key_events(all_events, expected):
+    events = [filter_dict(e, expected[0]) for e in all_events]
+    if len(events) > 0 and events[0]["code"] is None:
+        # Remove 'code' entry if browser doesn't support it
+        expected = [filter_dict(e, {"key": "", "type": ""}) for e in expected]
+        events = [filter_dict(e, expected[0]) for e in events]
+
+    return (events, expected)
+
+
 def wait_for_new_handle(session, handles_before):
     def find_new_handle(session):
         new_handles = list(set(session.handles) - set(handles_before))
diff --git a/tests/wpt/web-platform-tests/webnn/resources/test_data/prelu.json b/tests/wpt/web-platform-tests/webnn/resources/test_data/prelu.json
index f3855b0f4e1..e1bf6782619 100644
--- a/tests/wpt/web-platform-tests/webnn/resources/test_data/prelu.json
+++ b/tests/wpt/web-platform-tests/webnn/resources/test_data/prelu.json
@@ -514,7 +514,82 @@
           "type": "float32"
         },
         "slope": {
-          "shape": [1],
+          "shape": [3], // broadcast [3] --> [2, 2, 2, 3]
+          "data": [
+            5.073923296191488,
+            0.48077445494619653,
+            -7.091750168010829
+          ],
+          "type": "float32"
+        }
+      },
+      "expected": {
+        "name": "ouput",
+        "shape": [2, 2, 2, 3],
+        "data": [
+          -12.934283256530762,
+          -2.3052449226379395,
+          8.413617134094238,
+          6.108623504638672,
+          -4.082877159118652,
+          3.3143365383148193,
+          1.1687211990356445,
+          -0.06815595179796219,
+          47.61863327026367,
+          5.787421703338623,
+          -1.8056097030639648,
+          34.737422943115234,
+          7.3295159339904785,
+          -1.901092767715454,
+          7.067296981811523,
+          9.439736366271973,
+          -1.2299076318740845,
+          61.40629196166992,
+          8.47507381439209,
+          4.551425457000732,
+          65.72542572021484,
+          -1.330268144607544,
+          1.3258955478668213,
+          52.60881042480469
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "prelu float32 broadcast 4D x 1D slope of shape [1]",
+      "inputs": {
+        "x": {
+          "shape": [2, 2, 2, 3],
+          "data": [
+            -2.5491681672317235,
+            -4.794857500523286,
+            8.413617520687886,
+            6.108623511441287,
+            -8.492292847462334,
+            3.3143364551069876,
+            1.1687212422078108,
+            -0.1417628422981423,
+            -6.714651930677875,
+            5.787421746282195,
+            -3.7556274239369847,
+            -4.898286418001732,
+            7.329515995865023,
+            -3.9542297833176665,
+            7.067297201348715,
+            9.439736453375971,
+            -2.5581801134299775,
+            -8.658834185932482,
+            8.475073893236225,
+            4.551425642121982,
+            -9.267870491380243,
+            -0.26217744010265776,
+            1.325895534951659,
+            -7.418311114031475
+          ],
+          "type": "float32"
+        },
+        "slope": {
+          "shape": [1], // broadcast [1] --> [2, 2, 2, 3]
           "data": [
             5.0114545056636395
           ],
@@ -587,7 +662,7 @@
           "type": "float32"
         },
         "slope": {
-          "shape": [2, 3],
+          "shape": [2, 3], // broadcast [2, 3] --> [2, 2, 2, 3]
           "data": [
             4.8742760041637645,
             -8.50163357869285,
@@ -665,7 +740,7 @@
           "type": "float32"
         },
         "slope": {
-          "shape": [1, 1, 3],
+          "shape": [1, 1, 3], // broadcast [1, 1, 3] --> [2, 2, 2, 3]
           "data": [
             5.073923296191488,
             0.48077445494619653,
@@ -740,7 +815,7 @@
           "type": "float32"
         },
         "slope": {
-          "shape": [1, 1, 1, 1],
+          "shape": [1, 1, 1, 1], // broadcast [1, 1, 1, 1] --> [2, 2, 2, 3]
           "data": [
             5.0114545056636395
           ],
diff --git a/tests/wpt/web-platform-tests/webnn/resources/test_data/softsign.json b/tests/wpt/web-platform-tests/webnn/resources/test_data/softsign.json
new file mode 100644
index 00000000000..e3208b18ad4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webnn/resources/test_data/softsign.json
@@ -0,0 +1,400 @@
+{ // softsign: The calculation follows the expression x / (1 + |x|).
+  "tests": [
+    {
+      "name": "softsign positive float32 1D tensor",
+      "inputs": {
+        "x": {
+          "shape": [24],
+          "data": [
+            1.5834133593790956,
+            4.0787189411490115,
+            8.883356617490337,
+            8.070860233252166,
+            8.211773633019915,
+            2.4554003891197818,
+            0.653374178120758,
+            7.866281154604682,
+            3.1239552336192666,
+            8.013792390668268,
+            3.9409862749371283,
+            1.8131727337833081,
+            2.390676102273188,
+            1.3359680092645565,
+            9.416410839467265,
+            0.44325690899325254,
+            5.236662013213598,
+            9.424242359034539,
+            7.816190418459348,
+            5.849185795081855,
+            8.780370640491928,
+            5.1205157788312246,
+            7.1172223514005095,
+            4.59910661262345
+          ],
+          "type": "float32"
+        }
+      },
+      "expected": {
+        "name": "output",
+        "shape": [24],
+        "data": [
+          0.6129152178764343,
+          0.8030999898910522,
+          0.8988198041915894,
+          0.8897568583488464,
+          0.8914432525634766,
+          0.7105979323387146,
+          0.3951762318611145,
+          0.8872131109237671,
+          0.7575143575668335,
+          0.8890588879585266,
+          0.7976112365722656,
+          0.6445294618606567,
+          0.7050735354423523,
+          0.5719119310379028,
+          0.9039976596832275,
+          0.30712267756462097,
+          0.8396578431129456,
+          0.9040697813034058,
+          0.8865723013877869,
+          0.8539972305297852,
+          0.8977543711662292,
+          0.8366150856018066,
+          0.8768051266670227,
+          0.8214001059532166
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "softsign negative float32 1D tensor",
+      "inputs": {
+        "x": {
+          "shape": [24],
+          "data": [
+            -2.5978440095516913,
+            -0.4449555447737712,
+            -9.095475232407683,
+            -3.7480076975512873,
+            -1.3867289790255697,
+            -8.220328902868987,
+            -3.538342320320556,
+            -9.364588742025619,
+            -6.283252341501335,
+            -5.0020120266550006,
+            -8.245729151019969,
+            -3.775470497728266,
+            -4.087254829132392,
+            -7.3816760861585795,
+            -5.882921529710956,
+            -8.338910337100263,
+            -6.6015492897072185,
+            -4.491942000901396,
+            -3.524778486355298,
+            -4.439912258765581,
+            -5.2342625634221225,
+            -1.5911732471016933,
+            -9.106277545690418,
+            -8.523774275382141
+          ],
+          "type": "float32"
+        }
+      },
+      "expected": {
+        "name": "output",
+        "shape": [24],
+        "data": [
+          -0.7220557928085327,
+          -0.3079372048377991,
+          -0.9009457230567932,
+          -0.7893853783607483,
+          -0.5810165405273438,
+          -0.891543984413147,
+          -0.7796552181243896,
+          -0.9035176634788513,
+          -0.8626986742019653,
+          -0.8333892226219177,
+          -0.8918419480323792,
+          -0.7905965447425842,
+          -0.8034303188323975,
+          -0.8806921243667603,
+          -0.8547128438949585,
+          -0.8929211497306824,
+          -0.8684478402137756,
+          -0.8179150223731995,
+          -0.7789947390556335,
+          -0.8161734938621521,
+          -0.8395960927009583,
+          -0.6140744686126709,
+          -0.9010515809059143,
+          -0.894999623298645
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "softsign float32 2D tensor",
+      "inputs": {
+        "x": {
+          "shape": [4, 6],
+          "data": [
+            -8.343496173533422,
+            -6.92015211612679,
+            2.699638761922575,
+            -8.663104577031863,
+            -3.190534368785616,
+            7.657887080586452,
+            6.650215091182602,
+            6.058011004380681,
+            0.6634320403254037,
+            5.805803683155526,
+            -0.32821124531446344,
+            1.270430403469046,
+            -9.946119978610852,
+            6.905375202832072,
+            -0.031071535439890496,
+            -3.9696409293645862,
+            6.270823207970878,
+            -2.6392608577007914,
+            3.051350503137261,
+            7.42647683445869,
+            -8.454667518154086,
+            7.135868292466057,
+            -4.9860941550065885,
+            -7.859615086397076
+          ],
+          "type": "float32"
+        }
+      },
+      "expected": {
+        "name": "output",
+        "shape": [4, 6],
+        "data": [
+          -0.8929736614227295,
+          -0.8737397789955139,
+          0.7297033667564392,
+          -0.8965135812759399,
+          -0.7613669633865356,
+          0.8844983577728271,
+          0.8692847490310669,
+          0.8583170175552368,
+          0.3988332748413086,
+          0.8530665636062622,
+          -0.24710771441459656,
+          0.5595548748970032,
+          -0.9086434245109558,
+          0.8735038042068481,
+          -0.03013519011437893,
+          -0.798778235912323,
+          0.8624640107154846,
+          -0.7252188920974731,
+          0.7531687617301941,
+          0.88132643699646,
+          -0.8942321538925171,
+          0.8770874738693237,
+          -0.8329461812973022,
+          -0.8871282935142517
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "softsign float32 3D tensor",
+      "inputs": {
+        "x": {
+          "shape": [2, 3, 4],
+          "data": [
+            -8.343496173533422,
+            -6.92015211612679,
+            2.699638761922575,
+            -8.663104577031863,
+            -3.190534368785616,
+            7.657887080586452,
+            6.650215091182602,
+            6.058011004380681,
+            0.6634320403254037,
+            5.805803683155526,
+            -0.32821124531446344,
+            1.270430403469046,
+            -9.946119978610852,
+            6.905375202832072,
+            -0.031071535439890496,
+            -3.9696409293645862,
+            6.270823207970878,
+            -2.6392608577007914,
+            3.051350503137261,
+            7.42647683445869,
+            -8.454667518154086,
+            7.135868292466057,
+            -4.9860941550065885,
+            -7.859615086397076
+          ],
+          "type": "float32"
+        }
+      },
+      "expected": {
+        "name": "output",
+        "shape": [2, 3, 4],
+        "data": [
+          -0.8929736614227295,
+          -0.8737397789955139,
+          0.7297033667564392,
+          -0.8965135812759399,
+          -0.7613669633865356,
+          0.8844983577728271,
+          0.8692847490310669,
+          0.8583170175552368,
+          0.3988332748413086,
+          0.8530665636062622,
+          -0.24710771441459656,
+          0.5595548748970032,
+          -0.9086434245109558,
+          0.8735038042068481,
+          -0.03013519011437893,
+          -0.798778235912323,
+          0.8624640107154846,
+          -0.7252188920974731,
+          0.7531687617301941,
+          0.88132643699646,
+          -0.8942321538925171,
+          0.8770874738693237,
+          -0.8329461812973022,
+          -0.8871282935142517
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "softsign float32 4D tensor",
+      "inputs": {
+        "x": {
+          "shape": [1, 2, 3, 4],
+          "data": [
+            -8.343496173533422,
+            -6.92015211612679,
+            2.699638761922575,
+            -8.663104577031863,
+            -3.190534368785616,
+            7.657887080586452,
+            6.650215091182602,
+            6.058011004380681,
+            0.6634320403254037,
+            5.805803683155526,
+            -0.32821124531446344,
+            1.270430403469046,
+            -9.946119978610852,
+            6.905375202832072,
+            -0.031071535439890496,
+            -3.9696409293645862,
+            6.270823207970878,
+            -2.6392608577007914,
+            3.051350503137261,
+            7.42647683445869,
+            -8.454667518154086,
+            7.135868292466057,
+            -4.9860941550065885,
+            -7.859615086397076
+          ],
+          "type": "float32"
+        }
+      },
+      "expected": {
+        "name": "output",
+        "shape": [1, 2, 3, 4],
+        "data": [
+          -0.8929736614227295,
+          -0.8737397789955139,
+          0.7297033667564392,
+          -0.8965135812759399,
+          -0.7613669633865356,
+          0.8844983577728271,
+          0.8692847490310669,
+          0.8583170175552368,
+          0.3988332748413086,
+          0.8530665636062622,
+          -0.24710771441459656,
+          0.5595548748970032,
+          -0.9086434245109558,
+          0.8735038042068481,
+          -0.03013519011437893,
+          -0.798778235912323,
+          0.8624640107154846,
+          -0.7252188920974731,
+          0.7531687617301941,
+          0.88132643699646,
+          -0.8942321538925171,
+          0.8770874738693237,
+          -0.8329461812973022,
+          -0.8871282935142517
+        ],
+        "type": "float32"
+      }
+    },
+    {
+      "name": "softsign float32 5D tensor",
+      "inputs": {
+        "x": {
+          "shape": [1, 2, 1, 3, 4],
+          "data": [
+            -8.343496173533422,
+            -6.92015211612679,
+            2.699638761922575,
+            -8.663104577031863,
+            -3.190534368785616,
+            7.657887080586452,
+            6.650215091182602,
+            6.058011004380681,
+            0.6634320403254037,
+            5.805803683155526,
+            -0.32821124531446344,
+            1.270430403469046,
+            -9.946119978610852,
+            6.905375202832072,
+            -0.031071535439890496,
+            -3.9696409293645862,
+            6.270823207970878,
+            -2.6392608577007914,
+            3.051350503137261,
+            7.42647683445869,
+            -8.454667518154086,
+            7.135868292466057,
+            -4.9860941550065885,
+            -7.859615086397076
+          ],
+          "type": "float32"
+        }
+      },
+      "expected": {
+        "name": "output",
+        "shape": [1, 2, 1, 3, 4],
+        "data": [
+          -0.8929736614227295,
+          -0.8737397789955139,
+          0.7297033667564392,
+          -0.8965135812759399,
+          -0.7613669633865356,
+          0.8844983577728271,
+          0.8692847490310669,
+          0.8583170175552368,
+          0.3988332748413086,
+          0.8530665636062622,
+          -0.24710771441459656,
+          0.5595548748970032,
+          -0.9086434245109558,
+          0.8735038042068481,
+          -0.03013519011437893,
+          -0.798778235912323,
+          0.8624640107154846,
+          -0.7252188920974731,
+          0.7531687617301941,
+          0.88132643699646,
+          -0.8942321538925171,
+          0.8770874738693237,
+          -0.8329461812973022,
+          -0.8871282935142517
+        ],
+        "type": "float32"
+      }
+    }
+  ]
+}
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/webnn/resources/utils.js b/tests/wpt/web-platform-tests/webnn/resources/utils.js
index a91dfa04c6e..427b47e28cc 100644
--- a/tests/wpt/web-platform-tests/webnn/resources/utils.js
+++ b/tests/wpt/web-platform-tests/webnn/resources/utils.js
@@ -287,6 +287,7 @@ const PrecisionMetrics = {
   sigmoid: {ULP: {float32: 32+2, float16: 3}}, // float32 (leaving a few ULP for roundoff)
   slice: {ULP: {float32: 0, float16: 0}},
   softmax: {ULP: {float32: getSoftmaxPrecisionTolerance, float16: getSoftmaxPrecisionTolerance}},
+  softsign: {ULP: {float32: 3, float16: 3}},
   split: {ULP: {float32: 0, float16: 0}},
   squeeze: {ULP: {float32: 0, float16: 0}},
   tanh: {ATOL: {float32: 1/1024, float16: 1/512}},
diff --git a/tests/wpt/web-platform-tests/webnn/softsign.https.any.js b/tests/wpt/web-platform-tests/webnn/softsign.https.any.js
new file mode 100644
index 00000000000..61a7d5365fa
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webnn/softsign.https.any.js
@@ -0,0 +1,10 @@
+// META: title=test WebNN API softsign operation
+// META: global=window,dedicatedworker
+// META: script=./resources/utils.js
+// META: timeout=long
+
+'use strict';
+
+// https://webmachinelearning.github.io/webnn/#api-mlgraphbuilder-softsign
+
+testWebNNOperation('softsign', buildOperationWithSingleInput);
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/webrtc-extensions/RTCRtpTransceiver-headerExtensionControl.html b/tests/wpt/web-platform-tests/webrtc-extensions/RTCRtpTransceiver-headerExtensionControl.html
index b6dc7da5d40..79eba02727b 100644
--- a/tests/wpt/web-platform-tests/webrtc-extensions/RTCRtpTransceiver-headerExtensionControl.html
+++ b/tests/wpt/web-platform-tests/webrtc-extensions/RTCRtpTransceiver-headerExtensionControl.html
@@ -16,61 +16,88 @@ async function negotiate(pc1, pc2) {
   await pc1.setRemoteDescription(pc2.localDescription);
 }
 
-test(function(t) {
-  const pc = new RTCPeerConnection();
-  t.add_cleanup(() => pc.close());
-  const transceiver = pc.addTransceiver('video');
-  const capabilities = transceiver.getHeaderExtensionsToNegotiate();
-  let capability = capabilities.find((capability) => {
-      return capability.uri == "urn:ietf:params:rtp-hdrext:sdes:mid" &&
-             capability.direction != "stopped";
-  });
-  assert_not_equals(capability, undefined);
-}, `the video transceiver.getHeaderExtensionsToNegotiate() includes mandatory extensions`);
+['audio', 'video'].forEach(kind => {
+  test(t => {
+    const pc = new RTCPeerConnection();
+    t.add_cleanup(() => pc.close());
+    const transceiver = pc.addTransceiver(kind);
+    const capabilities = transceiver.getHeaderExtensionsToNegotiate();
+    const capability = capabilities.find((capability) => {
+        return capability.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid';
+    });
+    assert_not_equals(capability, undefined);
+    assert_equals(capability.direction, 'sendrecv');
+  }, `the ${kind} transceiver.getHeaderExtensionsToNegotiate() includes mandatory extensions`);
+});
 
-test(function(t) {
+test(t => {
   const pc = new RTCPeerConnection();
   t.add_cleanup(() => pc.close());
   const transceiver = pc.addTransceiver('audio');
   const capabilities = transceiver.getHeaderExtensionsToNegotiate();
-  let capability = capabilities.find((capability) => {
-      return capability.uri == "urn:ietf:params:rtp-hdrext:sdes:mid" &&
-             capability.direction != "stopped";
-  });
-  assert_not_equals(capability, undefined);
-}, `the audio transceiver.getHeaderExtensionsToNegotiate() includes mandatory extensions`);
-
-test(function(t) {
-  const pc = new RTCPeerConnection();
-  t.add_cleanup(() => pc.close());
-  const transceiver = pc.addTransceiver('audio');
-  const capabilities = transceiver.getHeaderExtensionsToNegotiate();
-  capabilities[0].uri = "";
+  capabilities[0].uri = '';
   assert_throws_js(TypeError, () => {
     transceiver.setHeaderExtensionsToNegotiate(capabilities);
   }, 'transceiver should throw TypeError when setting an empty URI');
 }, `setHeaderExtensionsToNegotiate throws TypeError on encountering missing URI`);
 
-test(function(t) {
+test(t => {
   const pc = new RTCPeerConnection();
   t.add_cleanup(() => pc.close());
   const transceiver = pc.addTransceiver('audio');
   const capabilities = transceiver.getHeaderExtensionsToNegotiate();
-  capabilities[0].uri = "4711";
+  capabilities[0].direction = '';
+  assert_throws_js(TypeError, () => {
+    transceiver.setHeaderExtensionsToNegotiate(capabilities);
+  }, 'transceiver should throw TypeError when setting an empty direction');
+}, `setHeaderExtensionsToNegotiate throws TypeError on encountering missing direction`);
+
+test(t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  const transceiver = pc.addTransceiver('audio');
+  const capabilities = transceiver.getHeaderExtensionsToNegotiate();
+  capabilities[0].uri = '4711';
   assert_throws_dom('InvalidModificationError', () => {
     transceiver.setHeaderExtensionsToNegotiate(capabilities);
   }, 'transceiver should throw InvalidModificationError when setting an unknown URI');
 }, `setHeaderExtensionsToNegotiate throws InvalidModificationError on encountering unknown URI`);
 
-test(function(t) {
+test(t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  const transceiver = pc.addTransceiver('video');
+  const capabilities = transceiver.getHeaderExtensionsToNegotiate().filter(capability => {
+    return capability.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid';
+  });
+  assert_throws_dom('InvalidModificationError', () => {
+    transceiver.setHeaderExtensionsToNegotiate(capabilities);
+  }, 'transceiver should throw InvalidModificationError when removing elements from the list');
+}, `setHeaderExtensionsToNegotiate throws InvalidModificationError when removing elements from the list`);
+
+test(t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+  const transceiver = pc.addTransceiver('video');
+  const capabilities = transceiver.getHeaderExtensionsToNegotiate();
+  capabilities.push({
+    uri: '4711',
+    direction: 'recvonly',
+  });
+  assert_throws_dom('InvalidModificationError', () => {
+    transceiver.setHeaderExtensionsToNegotiate(capabilities);
+  }, 'transceiver should throw InvalidModificationError when adding elements to the list');
+}, `setHeaderExtensionsToNegotiate throws InvalidModificationError when adding elements to the list`);
+
+test(t => {
   const pc = new RTCPeerConnection();
   t.add_cleanup(() => pc.close());
   const transceiver = pc.addTransceiver('audio');
   const capabilities = transceiver.getHeaderExtensionsToNegotiate();
   let capability = capabilities.find((capability) => {
-      return capability.uri == "urn:ietf:params:rtp-hdrext:sdes:mid";
+      return capability.uri === 'urn:ietf:params:rtp-hdrext:sdes:mid';
   });
-  ["sendonly", "recvonly", "inactive", "stopped"].map(direction => {
+  ['sendonly', 'recvonly', 'inactive', 'stopped'].map(direction => {
     capability.direction = direction;
     assert_throws_dom('InvalidModificationError', () => {
       transceiver.setHeaderExtensionsToNegotiate(capabilities);
@@ -78,23 +105,23 @@ test(function(t) {
   });
 }, `setHeaderExtensionsToNegotiate throws InvalidModificationError when setting a mandatory header extension\'s direction to something else than "sendrecv"`);
 
-test(function(t) {
+test(t => {
   const pc = new RTCPeerConnection();
   t.add_cleanup(() => pc.close());
   const transceiver = pc.addTransceiver('audio');
   let capabilities = transceiver.getHeaderExtensionsToNegotiate();
   let selected_capability = capabilities.find((capability) => {
-      return capability.direction == "sendrecv" &&
-             capability.uri != "urn:ietf:params:rtp-hdrext:sdes:mid";
+      return capability.direction === 'sendrecv' &&
+             capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
   });
-  selected_capability.direction = "stopped";
-  const offered_capabilities = transceiver.getHeaderExtensionsToNegotiate;
+  selected_capability.direction = 'stopped';
+  const offered_capabilities = transceiver.getHeaderExtensionsToNegotiate();
   let altered_capability = capabilities.find((capability) => {
-      return capability.uri == selected_capability.uri &&
-             capability.direction == "stopped";
+      return capability.uri === selected_capability.uri &&
+             capability.direction === 'stopped';
   });
   assert_not_equals(altered_capability, undefined);
-}, `modified direction set by setHeaderExtensionsToNegotiate is visible in headerExtensionsOffered`);
+}, `modified direction set by setHeaderExtensionsToNegotiate is visible in subsequent getHeaderExtensionsToNegotiate`);
 
 promise_test(async t => {
   const pc = new RTCPeerConnection();
@@ -102,19 +129,16 @@ promise_test(async t => {
   const transceiver = pc.addTransceiver('video');
   const capabilities = transceiver.getHeaderExtensionsToNegotiate();
   const offer = await pc.createOffer();
-  const extmaps = offer
-                      .sdp
-                      .split("\n")
-                      .filter(line => { return line.includes("a=extmap:"); })
-                      .join("\n");
+  const extensions = SDPUtils.matchPrefix(SDPUtils.splitSections(offer.sdp)[1], 'a=extmap:')
+    .map(line => SDPUtils.parseExtmap(line));
   for (const capability of capabilities) {
-    if (capability.direction == "stopped") {
-      assert_false(extmaps.includes(capability.uri));
+    if (capability.direction === 'stopped') {
+      assert_equals(undefined, extensions.find(e => e.uri === capability.uri));
     } else {
-      assert_true(extmaps.includes(capability.uri));
+      assert_not_equals(undefined, extensions.find(e => e.uri === capability.uri));
     }
   }
-}, `unstopped extensions turn up in offer`);
+}, `Unstopped extensions turn up in offer`);
 
 promise_test(async t => {
   const pc = new RTCPeerConnection();
@@ -122,25 +146,22 @@ promise_test(async t => {
   const transceiver = pc.addTransceiver('video');
   const capabilities = transceiver.getHeaderExtensionsToNegotiate();
   const selected_capability = capabilities.find((capability) => {
-      return capability.direction == "sendrecv" &&
-             capability.uri != "urn:ietf:params:rtp-hdrext:sdes:mid";
+      return capability.direction === 'sendrecv' &&
+             capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
   });
-  selected_capability.direction = "stopped";
+  selected_capability.direction = 'stopped';
   transceiver.setHeaderExtensionsToNegotiate(capabilities);
   const offer = await pc.createOffer();
-  const extmaps = offer
-                      .sdp
-                      .split("\n")
-                      .filter(line => { return line.includes("a=extmap:"); })
-                      .join("\n");
+  const extensions = SDPUtils.matchPrefix(SDPUtils.splitSections(offer.sdp)[1], 'a=extmap:')
+    .map(line => SDPUtils.parseExtmap(line));
   for (const capability of capabilities) {
-    if (capability.direction == "stopped") {
-      assert_false(extmaps.includes(capability.uri));
+    if (capability.direction === 'stopped') {
+      assert_equals(undefined, extensions.find(e => e.uri === capability.uri));
     } else {
-      assert_true(extmaps.includes(capability.uri));
+      assert_not_equals(undefined, extensions.find(e => e.uri === capability.uri));
     }
   }
-}, `stopped extensions do not turn up in offers`);
+}, `Stopped extensions do not turn up in offers`);
 
 promise_test(async t => {
   const pc1 = new RTCPeerConnection();
@@ -152,60 +173,49 @@ promise_test(async t => {
   const transceiver = pc1.addTransceiver('video');
   const capabilities = transceiver.getHeaderExtensionsToNegotiate();
   const selected_capability = capabilities.find((capability) => {
-      return capability.direction == "sendrecv" &&
-             capability.uri != "urn:ietf:params:rtp-hdrext:sdes:mid";
+      return capability.direction === 'sendrecv' &&
+             capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
   });
-  selected_capability.direction = "stopped";
+  selected_capability.direction = 'stopped';
+  transceiver.setHeaderExtensionsToNegotiate(capabilities);
+
+  await negotiate(pc1, pc2);
+  const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
+
+  assert_equals(capabilities.length, negotiated_capabilites.length);
+}, `The set of negotiated extensions has the same size as the set of extensions to negotiate`);
+
+promise_test(async t => {
+  const pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  const pc2 = new RTCPeerConnection();
+  t.add_cleanup(() => pc2.close());
+
+  // Disable a non-mandatory extension before first negotiation.
+  const transceiver = pc1.addTransceiver('video');
+  const capabilities = transceiver.getHeaderExtensionsToNegotiate();
+  const selected_capability = capabilities.find((capability) => {
+      return capability.direction === 'sendrecv' &&
+             capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid';
+  });
+  selected_capability.direction = 'stopped';
   transceiver.setHeaderExtensionsToNegotiate(capabilities);
 
   await negotiate(pc1, pc2);
   const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
 
   // Attempt enabling the extension.
-  selected_capability.direction = "sendrecv";
+  selected_capability.direction = 'sendrecv';
 
   // The enabled extension should not be part of the negotiated set.
   transceiver.setHeaderExtensionsToNegotiate(capabilities);
   await negotiate(pc1, pc2);
   assert_not_equals(
       transceiver.getNegotiatedHeaderExtensions().find(capability => {
-        return capability.uri == selected_capability.uri &&
-               capability.direction == "sendrecv";
+        return capability.uri === selected_capability.uri &&
+               capability.direction === 'sendrecv';
       }), undefined);
-}, `the set of negotiated extensions grows with subsequent offers`);
-
-promise_test(async t => {
-  const pc1 = new RTCPeerConnection();
-  t.add_cleanup(() => pc1.close());
-  const pc2 = new RTCPeerConnection();
-  t.add_cleanup(() => pc2.close());
-
-  // Disable a non-mandatory extension before first negotiation.
-  const transceiver = pc1.addTransceiver('video');
-  const capabilities = transceiver.getHeaderExtensionsToNegotiate();
-  const selected_capability = capabilities.find((capability) => {
-      return capability.direction == "sendrecv" &&
-             capability.uri != "urn:ietf:params:rtp-hdrext:sdes:mid";
-  });
-  selected_capability.direction = "stopped";
-  transceiver.setHeaderExtensionsToNegotiate(capabilities);
-
-  await negotiate(pc1, pc2);
-  const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
-
-  for (const capability of negotiated_capabilites) {
-    assert_not_equals(capabilities.find((cap) => {
-      return cap.uri == capability.uri && cap.direction != "stopped";
-    }), undefined);
-  }
-  for (const capability of capabilities) {
-    if (capability.direction != "stopped") {
-      assert_not_equals(negotiated_capabilites.find((cap) => {
-        return cap.uri == capability.uri;
-      }), undefined);
-    }
-  }
-}, `the set of negotiated extensions is the set of unstopped extensions`);
+}, `Header extensions can be reactivated in subsequent offers`);
 
 promise_test(async t => {
   const pc = new RTCPeerConnection();
@@ -235,6 +245,51 @@ promise_test(async t => {
   assert_equals(extensions.length, 2);
   assert_false(!!extensions[0].find(extension => extension.uri === extensionUri));
   assert_true(!!extensions[1].find(extension => extension.uri === extensionUri));
-}, 'Extensions can be deactivated on a per-mline basis');
+}, 'Header extensions can be deactivated on a per-mline basis');
+
+promise_test(async t => {
+  const pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  const pc2 = new RTCPeerConnection();
+  t.add_cleanup(() => pc2.close());
+
+  const t1 = pc1.addTransceiver('video');
+
+  await pc1.setLocalDescription();
+  await pc2.setRemoteDescription(pc1.localDescription);
+  // Get the transceiver after it is created by SRD.
+  const t2 = pc2.getTransceivers()[0];
+  const t2_capabilities = t2.getHeaderExtensionsToNegotiate();
+  const t2_capability_to_stop = t2_capabilities
+    .find(capability => capability.uri !== 'urn:ietf:params:rtp-hdrext:sdes:mid');
+  assert_not_equals(undefined, t2_capability_to_stop);
+  t2_capability_to_stop.direction = 'stopped';
+  t2.setHeaderExtensionsToNegotiate(t2_capabilities);
+
+  await pc2.setLocalDescription();
+  await pc1.setRemoteDescription(pc2.localDescription);
+
+  const t1_negotiated = t1.getNegotiatedHeaderExtensions()
+    .find(extension => extension.uri === t2_capability_to_stop.uri);
+  assert_not_equals(undefined, t1_negotiated);
+  assert_equals(t1_negotiated.direction, 'stopped');
+  const t1_capability = t1.getHeaderExtensionsToNegotiate()
+    .find(extension => extension.uri === t2_capability_to_stop.uri);
+  assert_not_equals(undefined, t1_capability);
+  assert_equals(t1_capability.direction, 'sendrecv');
+}, 'Extensions not negotiated by the peer are `stopped` in getNegotiatedHeaderExtensions');
+
+promise_test(async t => {
+  const pc = new RTCPeerConnection();
+  t.add_cleanup(() => pc.close());
+
+  const transceiver = pc.addTransceiver('video');
+  const negotiated_capabilites = transceiver.getNegotiatedHeaderExtensions();
+  assert_equals(negotiated_capabilites.length,
+                transceiver.getHeaderExtensionsToNegotiate().length);
+  for (const capability of negotiated_capabilites) {
+    assert_equals(capability.direction, 'stopped');
+  }
+}, 'Prior to negotiation, getNegotiatedHeaderExtensions() returns `stopped` for all extensions.');
 
 </script>
diff --git a/tests/wpt/web-platform-tests/webtransport/close.https.any.js.ini b/tests/wpt/web-platform-tests/webtransport/close.https.any.js.ini
deleted file mode 100644
index 6f118ff5f27..00000000000
--- a/tests/wpt/web-platform-tests/webtransport/close.https.any.js.ini
+++ /dev/null
@@ -1,19 +0,0 @@
-[close.https.any.html]
-  disabled:
-    if product != "chrome": true
-
-[close.https.any.window.html]
-  disabled:
-    if product != "chrome": true
-
-[close.https.any.worker.html]
-  disabled:
-    if product != "chrome": true
-
-[close.https.any.sharedworker.html]
-  disabled:
-    if product != "chrome": true
-
-[close.https.any.serviceworker.html]
-  disabled:
-    if product != "chrome": true
diff --git a/tests/wpt/web-platform-tests/webtransport/connect.https.any.js.ini b/tests/wpt/web-platform-tests/webtransport/connect.https.any.js.ini
deleted file mode 100644
index d53cd702ccd..00000000000
--- a/tests/wpt/web-platform-tests/webtransport/connect.https.any.js.ini
+++ /dev/null
@@ -1,19 +0,0 @@
-[connect.https.any.html]
-  disabled:
-    if product != "chrome": true
-
-[connect.https.any.window.html]
-  disabled:
-    if product != "chrome": true
-
-[connect.https.any.worker.html]
-  disabled:
-    if product != "chrome": true
-
-[connect.https.any.sharedworker.html]
-  disabled:
-    if product != "chrome": true
-
-[connect.https.any.serviceworker.html]
-  disabled:
-    if product != "chrome": true
diff --git a/tests/wpt/web-platform-tests/webtransport/csp-fail.https.window.js.ini b/tests/wpt/web-platform-tests/webtransport/csp-fail.https.window.js.ini
deleted file mode 100644
index adbd3c13592..00000000000
--- a/tests/wpt/web-platform-tests/webtransport/csp-fail.https.window.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[csp-fail.https.window.html]
-  disabled:
-    if product != "chrome": true
diff --git a/tests/wpt/web-platform-tests/webtransport/csp-pass.https.window.js.ini b/tests/wpt/web-platform-tests/webtransport/csp-pass.https.window.js.ini
deleted file mode 100644
index 28d68410bbe..00000000000
--- a/tests/wpt/web-platform-tests/webtransport/csp-pass.https.window.js.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[csp-pass.https.window.html]
-  disabled:
-    if product != "chrome": true
diff --git a/tests/wpt/web-platform-tests/webtransport/datagrams.https.any.js b/tests/wpt/web-platform-tests/webtransport/datagrams.https.any.js
index b96b36fc369..dc7133bb867 100644
--- a/tests/wpt/web-platform-tests/webtransport/datagrams.https.any.js
+++ b/tests/wpt/web-platform-tests/webtransport/datagrams.https.any.js
@@ -23,6 +23,20 @@ async function write_datagrams(writer, signal) {
   return sentTokens;
 }
 
+// Write N datagrams without waiting, then wait for them
+async function write_N_datagrams(writer, n) {
+  const encoder = new TextEncoder();
+  const sentTokens = [];
+  const promises = [];
+  while (sentTokens.length < n) {
+    const token = sentTokens.length.toString();
+    sentTokens.push(token);
+    promises.push(writer.write(encoder.encode(token)));
+  }
+  await Promise.all(promises);
+  return sentTokens;
+}
+
 // Read datagrams until the consumer has received enough i.e. N datagrams. Call
 // abort() after reading.
 async function read_datagrams(reader, controller, N) {
@@ -155,6 +169,37 @@ promise_test(async t => {
   assert_equals(error.name, 'RangeError');
 }, 'Reading datagrams with insufficient buffer should be rejected.');
 
+promise_test(async t => {
+  // Establish a WebTransport session.
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+
+  const writer = wt.datagrams.writable.getWriter();
+  const reader = wt.datagrams.readable.getReader();
+
+  // Write and read max-size datagram.
+  await writer.write(new Uint8Array(wt.datagrams.maxDatagramSize));
+  const { value: token, done } = await reader.read();
+  assert_false(done);
+  assert_equals(token.length, wt.datagrams.maxDatagramSize);
+}, 'Transfer max-size datagram');
+
+promise_test(async t => {
+  // Establish a WebTransport session.
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+
+  const writer = wt.datagrams.writable.getWriter();
+  const reader = wt.datagrams.readable.getReader();
+
+  // Write and read max-size datagram.
+  await writer.write(new Uint8Array(wt.datagrams.maxDatagramSize+1));
+  // This should resolve with no datagram sent, which is hard to test for.
+  // Wait for incoming datagrams to arrive, and if they do, fail.
+  const result = await Promise.race([reader.read(), wait(500)]);
+  assert_equals(result, undefined);
+}, 'Fail to transfer max-size+1 datagram');
+
 promise_test(async t => {
   // Make a WebTransport connection, but session is not necessarily established.
   const wt = new WebTransport(webtransport_url('echo.py'));
@@ -166,9 +211,10 @@ promise_test(async t => {
   const signal = controller.signal;
 
   // Write and read datagrams.
-  const N = 1;
+  const N = 5;
+  wt.datagrams.outgoingHighWaterMark = N;
   const [sentTokens, receivedTokens] = await Promise.all([
-      write_datagrams(writer, signal),
+      write_N_datagrams(writer, N),
       read_datagrams(reader, controller, N)
   ]);
 
@@ -269,3 +315,56 @@ promise_test(async t => {
   // incomingHighWaterMark.
   assert_less_than_equal(receivedDatagrams, N);
 }, 'Datagrams read is less than or equal to the incomingHighWaterMark');
+
+promise_test(async t => {
+  // Establish a WebTransport session.
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+
+  assert_equals(wt.datagrams.incomingMaxAge, Infinity);
+  assert_equals(wt.datagrams.outgoingMaxAge, Infinity);
+
+  wt.datagrams.incomingMaxAge = 5;
+  assert_equals(wt.datagrams.incomingMaxAge, 5);
+  wt.datagrams.outgoingMaxAge = 5;
+  assert_equals(wt.datagrams.outgoingMaxAge, 5);
+
+  assert_throws_js(RangeError, () => { wt.datagrams.incomingMaxAge = -1; });
+  assert_throws_js(RangeError, () => { wt.datagrams.outgoingMaxAge = -1; });
+  assert_throws_js(RangeError, () => { wt.datagrams.incomingMaxAge = NaN; });
+  assert_throws_js(RangeError, () => { wt.datagrams.outgoingMaxAge = NaN; });
+
+  wt.datagrams.incomingMaxAge = 0;
+  assert_equals(wt.datagrams.incomingMaxAge, Infinity);
+  wt.datagrams.outgoingMaxAge = 0;
+  assert_equals(wt.datagrams.outgoingMaxAge, Infinity);
+}, 'Datagram MaxAge getters/setters work correctly');
+
+promise_test(async t => {
+  // Establish a WebTransport session.
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+
+  // Initial values are implementation-defined
+  assert_greater_than_equal(wt.datagrams.incomingHighWaterMark, 1);
+  assert_greater_than_equal(wt.datagrams.outgoingHighWaterMark, 1);
+
+  wt.datagrams.incomingHighWaterMark = 5;
+  assert_equals(wt.datagrams.incomingHighWaterMark, 5);
+  wt.datagrams.outgoingHighWaterMark = 5;
+  assert_equals(wt.datagrams.outgoingHighWaterMark, 5);
+
+  assert_throws_js(RangeError, () => { wt.datagrams.incomingHighWaterMark = -1; });
+  assert_throws_js(RangeError, () => { wt.datagrams.outgoingHighWaterMark = -1; });
+  assert_throws_js(RangeError, () => { wt.datagrams.incomingHighWaterMark = NaN; });
+  assert_throws_js(RangeError, () => { wt.datagrams.outgoingHighWaterMark = NaN; });
+
+  wt.datagrams.incomingHighWaterMark = 0.5;
+  assert_equals(wt.datagrams.incomingHighWaterMark, 1);
+  wt.datagrams.outgoingHighWaterMark = 0.5;
+  assert_equals(wt.datagrams.outgoingHighWaterMark, 1);
+  wt.datagrams.incomingHighWaterMark = 0;
+  assert_equals(wt.datagrams.incomingHighWaterMark, 1);
+  wt.datagrams.outgoingHighWaterMark = 0;
+  assert_equals(wt.datagrams.outgoingHighWaterMark, 1);
+}, 'Datagram HighWaterMark getters/setters work correctly');
diff --git a/tests/wpt/web-platform-tests/webtransport/datagrams.https.any.js.ini b/tests/wpt/web-platform-tests/webtransport/datagrams.https.any.js.ini
deleted file mode 100644
index 49ad1548df3..00000000000
--- a/tests/wpt/web-platform-tests/webtransport/datagrams.https.any.js.ini
+++ /dev/null
@@ -1,19 +0,0 @@
-[datagrams.https.any.html]
-  disabled:
-    if product != "chrome": true
-
-[datagrams.https.any.window.html]
-  disabled:
-    if product != "chrome": true
-
-[datagrams.https.any.worker.html]
-  disabled:
-    if product != "chrome": true
-
-[datagrams.https.any.sharedworker.html]
-  disabled:
-    if product != "chrome": true
-
-[datagrams.https.any.serviceworker.html]
-  disabled:
-    if product != "chrome": true
diff --git a/tests/wpt/web-platform-tests/webtransport/resources/webtransport-test-helpers.sub.js b/tests/wpt/web-platform-tests/webtransport/resources/webtransport-test-helpers.sub.js
index 733153e1202..9f9127b22f9 100644
--- a/tests/wpt/web-platform-tests/webtransport/resources/webtransport-test-helpers.sub.js
+++ b/tests/wpt/web-platform-tests/webtransport/resources/webtransport-test-helpers.sub.js
@@ -20,6 +20,23 @@ function webtransport_code_to_http_code(n) {
   return first + n + Math.floor(n / 0x1e);
 }
 
+// Read all chunks from |readable_stream| and return as an array of arrays
+async function read_stream(readable_stream) {
+  const reader = readable_stream.getReader();
+
+  let chunks = [];
+  while (true) {
+    const {value: chunk, done} = await reader.read();
+    if (done) {
+      break;
+    }
+    chunks.push(chunk);
+  }
+  reader.releaseLock();
+
+  return chunks;
+}
+
 // Read all chunks from |readable_stream|, decode chunks to a utf-8 string, then
 // return the string.
 async function read_stream_as_string(readable_stream) {
diff --git a/tests/wpt/web-platform-tests/webtransport/streams-close.https.any.js.ini b/tests/wpt/web-platform-tests/webtransport/streams-close.https.any.js.ini
deleted file mode 100644
index 0d60f7e54db..00000000000
--- a/tests/wpt/web-platform-tests/webtransport/streams-close.https.any.js.ini
+++ /dev/null
@@ -1,19 +0,0 @@
-[streams-close.https.any.html]
-  disabled:
-    if product != "chrome": true
-
-[streams-close.https.any.window.html]
-  disabled:
-    if product != "chrome": true
-
-[streams-close.https.any.worker.html]
-  disabled:
-    if product != "chrome": true
-
-[streams-close.https.any.sharedworker.html]
-  disabled:
-    if product != "chrome": true
-
-[streams-close.https.any.serviceworker.html]
-  disabled:
-    if product != "chrome": true
diff --git a/tests/wpt/web-platform-tests/webtransport/streams-echo.https.any.js b/tests/wpt/web-platform-tests/webtransport/streams-echo.https.any.js
index 32781419ebf..3b402d00e08 100644
--- a/tests/wpt/web-platform-tests/webtransport/streams-echo.https.any.js
+++ b/tests/wpt/web-platform-tests/webtransport/streams-echo.https.any.js
@@ -151,3 +151,83 @@ promise_test(async t => {
   }
   reader.releaseLock();
 }, 'Can read data from a unidirectional stream with BYOB reader');
+
+promise_test(async t => {
+  // Establish a WebTransport session.
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+
+  // Create a bidirectional stream.
+  const bidi_stream = await wt.createBidirectionalStream();
+
+  // Write a message to the writable end, and close it.
+  const writer = bidi_stream.writable.getWriter();
+  const bytes = new Uint8Array(16384);
+  const [reply] = await Promise.all([
+    read_stream(bidi_stream.readable),
+    writer.write(bytes),
+    writer.write(bytes),
+    writer.write(bytes),
+    writer.close()
+  ]);
+  let len = 0;
+  for (chunk of reply) {
+    len += chunk.length;
+  }
+  // Check that the message from the readable end matches the writable end.
+  assert_equals(len, 3*bytes.length);
+}, 'Transfer large chunks of data on a bidirectional stream');
+
+promise_test(async t => {
+  // Establish a WebTransport session.
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+
+  // Create a unidirectional stream.
+  const uni_stream = await wt.createUnidirectionalStream();
+
+  // Write a message to the writable end, and close it.
+  const writer = uni_stream.getWriter();
+  const bytes = new Uint8Array(16384);
+  await Promise.all([
+    writer.write(bytes),
+    writer.write(bytes),
+    writer.write(bytes),
+    writer.close()
+  ]);
+  // XXX Update once chrome fixes https://crbug.com/929585
+  // The echo handler creates a new unidirectional stream to echo back data from
+  // the server to client. Accept the unidirectional stream.
+  const readable = wt.incomingUnidirectionalStreams;
+  const stream_reader = readable.getReader();
+  const { value: recv_stream } = await stream_reader.read();
+  stream_reader.releaseLock();
+
+  // Read the data on the readable end.
+  const reply = await read_stream(recv_stream);
+  let len = 0;
+  for (chunk of reply) {
+    len += chunk.length;
+  }
+  // Check that the message from the readable end matches the writable end.
+  assert_equals(len, 3*bytes.length);
+}, 'Transfer large chunks of data on a unidirectional stream');
+
+promise_test(async t => {
+  // Establish a WebTransport session.
+  const wt = new WebTransport(webtransport_url('echo.py'));
+  await wt.ready;
+
+  // Create a bidirectional stream.
+  const bidi_stream = await wt.createBidirectionalStream();
+
+  // Close the writable end with no data at all.
+  const writer = bidi_stream.writable.getWriter();
+  writer.close();
+
+  // Read the data on the readable end.
+  const chunks = await read_stream(bidi_stream.readable);
+  assert_equals(chunks.length, 0);
+
+  await bidi_stream.readable.closed;
+}, 'Closing the stream with no data still resolves the read request');
diff --git a/tests/wpt/web-platform-tests/webtransport/streams-echo.https.any.js.ini b/tests/wpt/web-platform-tests/webtransport/streams-echo.https.any.js.ini
deleted file mode 100644
index eb11ca786f1..00000000000
--- a/tests/wpt/web-platform-tests/webtransport/streams-echo.https.any.js.ini
+++ /dev/null
@@ -1,19 +0,0 @@
-[streams-echo.https.any.html]
-  disabled:
-    if product != "chrome": true
-
-[streams-echo.https.any.window.html]
-  disabled:
-    if product != "chrome": true
-
-[streams-echo.https.any.worker.html]
-  disabled:
-    if product != "chrome": true
-
-[streams-echo.https.any.sharedworker.html]
-  disabled:
-    if product != "chrome": true
-
-[streams-echo.https.any.serviceworker.html]
-  disabled:
-    if product != "chrome": true
diff --git a/tests/wpt/webgl/meta/conformance/textures/misc/origin-clean-conformance-offscreencanvas.html.ini b/tests/wpt/webgl/meta/conformance/textures/misc/origin-clean-conformance-offscreencanvas.html.ini
index 4e4810ca509..278f0d1eb20 100644
--- a/tests/wpt/webgl/meta/conformance/textures/misc/origin-clean-conformance-offscreencanvas.html.ini
+++ b/tests/wpt/webgl/meta/conformance/textures/misc/origin-clean-conformance-offscreencanvas.html.ini
@@ -2,6 +2,3 @@
   expected: ERROR
   [WebGL test #2: Unable to fetch WebGL rendering context for Canvas]
     expected: FAIL
-
-  [WebGL test #0: img was loaded]
-    expected: FAIL
diff --git a/tests/wpt/webgl/meta/conformance2/textures/misc/origin-clean-conformance-offscreencanvas.html.ini b/tests/wpt/webgl/meta/conformance2/textures/misc/origin-clean-conformance-offscreencanvas.html.ini
index 4e4810ca509..278f0d1eb20 100644
--- a/tests/wpt/webgl/meta/conformance2/textures/misc/origin-clean-conformance-offscreencanvas.html.ini
+++ b/tests/wpt/webgl/meta/conformance2/textures/misc/origin-clean-conformance-offscreencanvas.html.ini
@@ -2,6 +2,3 @@
   expected: ERROR
   [WebGL test #2: Unable to fetch WebGL rendering context for Canvas]
     expected: FAIL
-
-  [WebGL test #0: img was loaded]
-    expected: FAIL