diff --git a/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini b/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
index 6a3af4e2ece..947e223fb28 100644
--- a/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-with-fetch.any.js.ini
@@ -14,9 +14,6 @@
   [Revoke blob URL after creating Request, will fetch]
     expected: FAIL
 
-  [Revoke blob URL after calling fetch, fetch should succeed]
-    expected: FAIL
-
 
 [url-with-fetch.any.html]
   [Untitled]
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 1e8317362af..b61081ad02d 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -113625,6 +113625,18 @@
      {}
     ]
    ],
+   "css/css-contain/contain-size-fieldset-002.html": [
+    [
+     "css/css-contain/contain-size-fieldset-002.html",
+     [
+      [
+       "/css/css-contain/reference/contain-size-fieldset-002-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-contain/contain-size-flexbox-001.html": [
     [
      "css/css-contain/contain-size-flexbox-001.html",
@@ -121065,6 +121077,18 @@
      {}
     ]
    ],
+   "css/css-flexbox/overflow-auto-001.html": [
+    [
+     "css/css-flexbox/overflow-auto-001.html",
+     [
+      [
+       "/css/reference/ref-filled-green-100px-square.xht",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-flexbox/overflow-top-left.html": [
     [
      "css/css-flexbox/overflow-top-left.html",
@@ -131863,6 +131887,18 @@
      {}
     ]
    ],
+   "css/css-multicol/multicol-span-all-011.html": [
+    [
+     "css/css-multicol/multicol-span-all-011.html",
+     [
+      [
+       "/css/css-multicol/multicol-span-all-011-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-multicol/multicol-span-all-block-sibling-003.xht": [
     [
      "css/css-multicol/multicol-span-all-block-sibling-003.xht",
@@ -201377,18 +201413,6 @@
      {}
     ]
    ],
-   "mathml/relations/css-styling/lengths-2.html": [
-    [
-     "mathml/relations/css-styling/lengths-2.html",
-     [
-      [
-       "/mathml/relations/css-styling/lengths-2-ref.html",
-       "=="
-      ]
-     ],
-     {}
-    ]
-   ],
    "mathml/relations/css-styling/mathvariant-bold-fraktur.html": [
     [
      "mathml/relations/css-styling/mathvariant-bold-fraktur.html",
@@ -203429,6 +203453,18 @@
      {}
     ]
    ],
+   "svg/text/reftests/text-xml-space-001.svg": [
+    [
+     "svg/text/reftests/text-xml-space-001.svg",
+     [
+      [
+       "/svg/text/reftests/text-xml-space-001-ref.svg",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "svg/text/reftests/textpath-shape-001.svg": [
     [
      "svg/text/reftests/textpath-shape-001.svg",
@@ -241150,6 +241186,9 @@
    "css/css-contain/reference/contain-size-fieldset-001-ref.html": [
     []
    ],
+   "css/css-contain/reference/contain-size-fieldset-002-ref.html": [
+    []
+   ],
    "css/css-contain/reference/contain-size-flexbox-001-ref.html": [
     []
    ],
@@ -248479,6 +248518,9 @@
    "css/css-multicol/multicol-span-all-010-ref.html": [
     []
    ],
+   "css/css-multicol/multicol-span-all-011-ref.html": [
+    []
+   ],
    "css/css-multicol/multicol-span-all-block-sibling-3-ref.xht": [
     []
    ],
@@ -264112,6 +264154,42 @@
    "html/cross-origin-opener/resources/window.sub.html.headers": [
     []
    ],
+   "html/cross-origin/anonymous.tentative.html.headers": [
+    []
+   ],
+   "html/cross-origin/null.tentative.html.headers": [
+    []
+   ],
+   "html/cross-origin/resources/navigate_anonymous.sub.html": [
+    []
+   ],
+   "html/cross-origin/resources/navigate_anonymous.sub.html.headers": [
+    []
+   ],
+   "html/cross-origin/resources/navigate_null.sub.html": [
+    []
+   ],
+   "html/cross-origin/resources/navigate_usecredentials.sub.html": [
+    []
+   ],
+   "html/cross-origin/resources/navigate_usecredentials.sub.html.headers": [
+    []
+   ],
+   "html/cross-origin/resources/nothing.txt": [
+    []
+   ],
+   "html/cross-origin/resources/nothing.txt.headers": [
+    []
+   ],
+   "html/cross-origin/resources/popup_and_close.sub.html": [
+    []
+   ],
+   "html/cross-origin/resources/popup_and_close.sub.html.headers": [
+    []
+   ],
+   "html/cross-origin/usecredentials.tentative.html.headers": [
+    []
+   ],
    "html/dom/documents/dom-tree-accessors/cross-domain.js": [
     []
    ],
@@ -270592,9 +270670,6 @@
    "mathml/relations/css-styling/lengths-1-ref.html": [
     []
    ],
-   "mathml/relations/css-styling/lengths-2-ref.html": [
-    []
-   ],
    "mathml/relations/css-styling/mathvariant-bold-fraktur-ref.html": [
     []
    ],
@@ -277870,6 +277945,9 @@
    "svg/text/reftests/text-text-anchor-203-ref.svg": [
     []
    ],
+   "svg/text/reftests/text-xml-space-001-ref.svg": [
+    []
+   ],
    "svg/text/reftests/textpath-shape-001-ref.svg": [
     []
    ],
@@ -277882,6 +277960,12 @@
    "testharness_runner.html": [
     []
    ],
+   "timing-entrytypes-registry/META.yml": [
+    []
+   ],
+   "timing-entrytypes-registry/resources/utils.js": [
+    []
+   ],
    "tools/.gitattributes": [
     []
    ],
@@ -307254,6 +307338,12 @@
      {}
     ]
    ],
+   "css/css-animations/parsing/animation-timing-function-computed.html": [
+    [
+     "css/css-animations/parsing/animation-timing-function-computed.html",
+     {}
+    ]
+   ],
    "css/css-animations/parsing/animation-timing-function-invalid.html": [
     [
      "css/css-animations/parsing/animation-timing-function-invalid.html",
@@ -307266,6 +307356,12 @@
      {}
     ]
    ],
+   "css/css-animations/parsing/transition-timing-function-computed.html": [
+    [
+     "css/css-animations/parsing/transition-timing-function-computed.html",
+     {}
+    ]
+   ],
    "css/css-animations/pending-style-changes-001.html": [
     [
      "css/css-animations/pending-style-changes-001.html",
@@ -307542,6 +307638,12 @@
      {}
     ]
    ],
+   "css/css-backgrounds/parsing/border-color-computed.html": [
+    [
+     "css/css-backgrounds/parsing/border-color-computed.html",
+     {}
+    ]
+   ],
    "css/css-backgrounds/parsing/border-color-invalid.html": [
     [
      "css/css-backgrounds/parsing/border-color-invalid.html",
@@ -307560,6 +307662,12 @@
      {}
     ]
    ],
+   "css/css-backgrounds/parsing/border-image-outset-computed.html": [
+    [
+     "css/css-backgrounds/parsing/border-image-outset-computed.html",
+     {}
+    ]
+   ],
    "css/css-backgrounds/parsing/border-image-outset-invalid.html": [
     [
      "css/css-backgrounds/parsing/border-image-outset-invalid.html",
@@ -307572,6 +307680,12 @@
      {}
     ]
    ],
+   "css/css-backgrounds/parsing/border-image-repeat-computed.html": [
+    [
+     "css/css-backgrounds/parsing/border-image-repeat-computed.html",
+     {}
+    ]
+   ],
    "css/css-backgrounds/parsing/border-image-repeat-invalid.html": [
     [
      "css/css-backgrounds/parsing/border-image-repeat-invalid.html",
@@ -307584,6 +307698,12 @@
      {}
     ]
    ],
+   "css/css-backgrounds/parsing/border-image-slice-computed.html": [
+    [
+     "css/css-backgrounds/parsing/border-image-slice-computed.html",
+     {}
+    ]
+   ],
    "css/css-backgrounds/parsing/border-image-slice-invalid.html": [
     [
      "css/css-backgrounds/parsing/border-image-slice-invalid.html",
@@ -307596,6 +307716,12 @@
      {}
     ]
    ],
+   "css/css-backgrounds/parsing/border-image-source-computed.html": [
+    [
+     "css/css-backgrounds/parsing/border-image-source-computed.html",
+     {}
+    ]
+   ],
    "css/css-backgrounds/parsing/border-image-source-invalid.html": [
     [
      "css/css-backgrounds/parsing/border-image-source-invalid.html",
@@ -307614,6 +307740,12 @@
      {}
     ]
    ],
+   "css/css-backgrounds/parsing/border-image-width-computed.html": [
+    [
+     "css/css-backgrounds/parsing/border-image-width-computed.html",
+     {}
+    ]
+   ],
    "css/css-backgrounds/parsing/border-image-width-invalid.html": [
     [
      "css/css-backgrounds/parsing/border-image-width-invalid.html",
@@ -307644,6 +307776,12 @@
      {}
     ]
    ],
+   "css/css-backgrounds/parsing/border-style-computed.html": [
+    [
+     "css/css-backgrounds/parsing/border-style-computed.html",
+     {}
+    ]
+   ],
    "css/css-backgrounds/parsing/border-style-invalid.html": [
     [
      "css/css-backgrounds/parsing/border-style-invalid.html",
@@ -307662,6 +307800,12 @@
      {}
     ]
    ],
+   "css/css-backgrounds/parsing/border-width-computed.html": [
+    [
+     "css/css-backgrounds/parsing/border-width-computed.html",
+     {}
+    ]
+   ],
    "css/css-backgrounds/parsing/border-width-invalid.html": [
     [
      "css/css-backgrounds/parsing/border-width-invalid.html",
@@ -312492,6 +312636,12 @@
      {}
     ]
    ],
+   "css/css-position/position-absolute-chrome-bug-001.html": [
+    [
+     "css/css-position/position-absolute-chrome-bug-001.html",
+     {}
+    ]
+   ],
    "css/css-position/position-absolute-container-dynamic-002.html": [
     [
      "css/css-position/position-absolute-container-dynamic-002.html",
@@ -316260,6 +316410,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/hyphens-computed.html": [
+    [
+     "css/css-text/parsing/hyphens-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/hyphens-invalid.html": [
     [
      "css/css-text/parsing/hyphens-invalid.html",
@@ -316272,6 +316428,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/letter-spacing-computed.html": [
+    [
+     "css/css-text/parsing/letter-spacing-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/letter-spacing-invalid.html": [
     [
      "css/css-text/parsing/letter-spacing-invalid.html",
@@ -316284,6 +316446,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/line-break-computed.html": [
+    [
+     "css/css-text/parsing/line-break-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/line-break-invalid.html": [
     [
      "css/css-text/parsing/line-break-invalid.html",
@@ -316296,6 +316464,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/overflow-wrap-computed.html": [
+    [
+     "css/css-text/parsing/overflow-wrap-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/overflow-wrap-invalid.html": [
     [
      "css/css-text/parsing/overflow-wrap-invalid.html",
@@ -316308,6 +316482,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/tab-size-computed.html": [
+    [
+     "css/css-text/parsing/tab-size-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/tab-size-invalid.html": [
     [
      "css/css-text/parsing/tab-size-invalid.html",
@@ -316338,6 +316518,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/text-align-last-computed.html": [
+    [
+     "css/css-text/parsing/text-align-last-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/text-align-last-invalid.html": [
     [
      "css/css-text/parsing/text-align-last-invalid.html",
@@ -316356,6 +316542,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/text-indent-computed.html": [
+    [
+     "css/css-text/parsing/text-indent-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/text-indent-invalid.html": [
     [
      "css/css-text/parsing/text-indent-invalid.html",
@@ -316368,6 +316560,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/text-justify-computed.html": [
+    [
+     "css/css-text/parsing/text-justify-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/text-justify-invalid.html": [
     [
      "css/css-text/parsing/text-justify-invalid.html",
@@ -316380,6 +316578,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/text-transform-computed.html": [
+    [
+     "css/css-text/parsing/text-transform-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/text-transform-invalid.html": [
     [
      "css/css-text/parsing/text-transform-invalid.html",
@@ -316392,6 +316596,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/white-space-computed.html": [
+    [
+     "css/css-text/parsing/white-space-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/white-space-invalid.html": [
     [
      "css/css-text/parsing/white-space-invalid.html",
@@ -316404,6 +316614,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/word-break-computed.html": [
+    [
+     "css/css-text/parsing/word-break-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/word-break-invalid.html": [
     [
      "css/css-text/parsing/word-break-invalid.html",
@@ -316416,6 +316632,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/word-spacing-computed.html": [
+    [
+     "css/css-text/parsing/word-spacing-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/word-spacing-invalid.html": [
     [
      "css/css-text/parsing/word-spacing-invalid.html",
@@ -316428,6 +316650,12 @@
      {}
     ]
    ],
+   "css/css-text/parsing/word-wrap-computed.html": [
+    [
+     "css/css-text/parsing/word-wrap-computed.html",
+     {}
+    ]
+   ],
    "css/css-text/parsing/word-wrap-invalid.html": [
     [
      "css/css-text/parsing/word-wrap-invalid.html",
@@ -316590,6 +316818,12 @@
      {}
     ]
    ],
+   "css/css-text/word-break/word-break-break-word-crash-001.html": [
+    [
+     "css/css-text/word-break/word-break-break-word-crash-001.html",
+     {}
+    ]
+   ],
    "css/css-transforms/2d-rotate-js.html": [
     [
      "css/css-transforms/2d-rotate-js.html",
@@ -342656,6 +342890,30 @@
      {}
     ]
    ],
+   "html/cross-origin/anonymous.tentative.html": [
+    [
+     "html/cross-origin/anonymous.tentative.html",
+     {
+      "timeout": "long"
+     }
+    ]
+   ],
+   "html/cross-origin/null.tentative.html": [
+    [
+     "html/cross-origin/null.tentative.html",
+     {
+      "timeout": "long"
+     }
+    ]
+   ],
+   "html/cross-origin/usecredentials.tentative.html": [
+    [
+     "html/cross-origin/usecredentials.tentative.html",
+     {
+      "timeout": "long"
+     }
+    ]
+   ],
    "html/dom/documents/dom-tree-accessors/Document.body.html": [
     [
      "html/dom/documents/dom-tree-accessors/Document.body.html",
@@ -344300,6 +344558,12 @@
      {}
     ]
    ],
+   "html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/mouse-cursor-imagemap.html": [
+    [
+     "html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/mouse-cursor-imagemap.html",
+     {}
+    ]
+   ],
    "html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/no-help-cursor-on-links.historical.html": [
     [
      "html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/no-help-cursor-on-links.historical.html",
@@ -355707,6 +355971,12 @@
      {}
     ]
    ],
+   "intersection-observer/root-margin-rounding.html": [
+    [
+     "intersection-observer/root-margin-rounding.html",
+     {}
+    ]
+   ],
    "intersection-observer/root-margin.html": [
     [
      "intersection-observer/root-margin.html",
@@ -356487,9 +356757,9 @@
      {}
     ]
    ],
-   "mathml/relations/css-styling/lengths-3.html": [
+   "mathml/relations/css-styling/lengths-2.html": [
     [
-     "mathml/relations/css-styling/lengths-3.html",
+     "mathml/relations/css-styling/lengths-2.html",
      {}
     ]
    ],
@@ -357350,6 +357620,12 @@
      {}
     ]
    ],
+   "mediacapture-streams/MediaStream-MediaElement-firstframe.https.html": [
+    [
+     "mediacapture-streams/MediaStream-MediaElement-firstframe.https.html",
+     {}
+    ]
+   ],
    "mediacapture-streams/MediaStream-MediaElement-srcObject.https.html": [
     [
      "mediacapture-streams/MediaStream-MediaElement-srcObject.https.html",
@@ -393532,6 +393808,43 @@
      {}
     ]
    ],
+   "timing-entrytypes-registry/registry.any.js": [
+    [
+     "timing-entrytypes-registry/registry.any.html",
+     {
+      "script_metadata": [
+       [
+        "script",
+        "resources/utils.js"
+       ]
+      ]
+     }
+    ],
+    [
+     "timing-entrytypes-registry/registry.any.worker.html",
+     {
+      "script_metadata": [
+       [
+        "script",
+        "resources/utils.js"
+       ]
+      ]
+     }
+    ]
+   ],
+   "timing-entrytypes-registry/registry.window.js": [
+    [
+     "timing-entrytypes-registry/registry.window.html",
+     {
+      "script_metadata": [
+       [
+        "script",
+        "resources/utils.js"
+       ]
+      ]
+     }
+    ]
+   ],
    "touch-events/historical.html": [
     [
      "touch-events/historical.html",
@@ -399411,6 +399724,12 @@
      {}
     ]
    ],
+   "webaudio/the-audio-api/the-channelmergernode-interface/active-processing.https.html": [
+    [
+     "webaudio/the-audio-api/the-channelmergernode-interface/active-processing.https.html",
+     {}
+    ]
+   ],
    "webaudio/the-audio-api/the-channelmergernode-interface/audiochannelmerger-basic.html": [
     [
      "webaudio/the-audio-api/the-channelmergernode-interface/audiochannelmerger-basic.html",
@@ -401139,6 +401458,14 @@
      {}
     ]
    ],
+   "webrtc/RTCPeerConnection-mandatory-getStats.https.html": [
+    [
+     "webrtc/RTCPeerConnection-mandatory-getStats.https.html",
+     {
+      "timeout": "long"
+     }
+    ]
+   ],
    "webrtc/RTCPeerConnection-ondatachannel.html": [
     [
      "webrtc/RTCPeerConnection-ondatachannel.html",
@@ -428848,6 +429175,12 @@
      {}
     ]
    ],
+   "css/css-font-loading/fontfaceset-no-root-element.html": [
+    [
+     "css/css-font-loading/fontfaceset-no-root-element.html",
+     {}
+    ]
+   ],
    "css/css-fonts/font-face-unicode-range.html": [
     [
      "css/css-fonts/font-face-unicode-range.html",
@@ -431744,6 +432077,12 @@
      {}
     ]
    ],
+   "webdriver/tests/switch_to_frame/cross_origin.py": [
+    [
+     "webdriver/tests/switch_to_frame/cross_origin.py",
+     {}
+    ]
+   ],
    "webdriver/tests/switch_to_frame/switch.py": [
     [
      "webdriver/tests/switch_to_frame/switch.py",
@@ -442186,19 +442525,19 @@
    "testharness"
   ],
   "beacon/headers/header-referrer-strict-origin-when-cross-origin.https.html": [
-   "ef6a5984066a81619b79b0416d70569881280884",
+   "f31003500941636eaef1c9a61ce38851c4cb1b23",
    "testharness"
   ],
   "beacon/headers/header-referrer-strict-origin.https.html": [
-   "ef6a5984066a81619b79b0416d70569881280884",
+   "b65bc795d2c82e8c2b3f29774d9f2c182da7c5c2",
    "testharness"
   ],
   "beacon/headers/header-referrer-unsafe-url.https.html": [
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@@ -530329,6 +530704,10 @@
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@@ -533201,6 +533584,10 @@
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@@ -538297,6 +538684,10 @@
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@@ -538945,6 +539336,10 @@
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+  "css/css-multicol/multicol-span-all-011-ref.html": [
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@@ -554993,6 +555396,10 @@
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@@ -565297,6 +565704,10 @@
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@@ -565305,6 +565716,10 @@
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@@ -565321,6 +565740,10 @@
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@@ -565329,6 +565752,10 @@
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@@ -565349,6 +565776,10 @@
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@@ -565361,6 +565792,10 @@
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@@ -565369,6 +565804,10 @@
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@@ -565377,6 +565816,10 @@
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@@ -565385,6 +565828,10 @@
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+   "testharness"
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@@ -565393,6 +565840,10 @@
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+  "css/css-text/parsing/word-break-computed.html": [
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+   "testharness"
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@@ -565401,6 +565852,10 @@
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+   "testharness"
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@@ -565409,6 +565864,10 @@
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+  "css/css-text/parsing/word-wrap-computed.html": [
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+   "testharness"
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@@ -568217,6 +568676,10 @@
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    "reftest"
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+  "css/css-text/word-break/word-break-break-word-crash-001.html": [
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+   "testharness"
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@@ -613065,6 +613528,66 @@
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    "support"
   ],
+  "html/cross-origin/anonymous.tentative.html": [
+   "ef9b9bb7b878a738c8f7e377d4cfe62b41dfea7f",
+   "testharness"
+  ],
+  "html/cross-origin/anonymous.tentative.html.headers": [
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+   "support"
+  ],
+  "html/cross-origin/null.tentative.html": [
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+   "testharness"
+  ],
+  "html/cross-origin/null.tentative.html.headers": [
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+   "support"
+  ],
+  "html/cross-origin/resources/navigate_anonymous.sub.html": [
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+   "support"
+  ],
+  "html/cross-origin/resources/navigate_anonymous.sub.html.headers": [
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+   "support"
+  ],
+  "html/cross-origin/resources/navigate_null.sub.html": [
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+   "support"
+  ],
+  "html/cross-origin/resources/navigate_usecredentials.sub.html": [
+   "1008f70ff123ae5e507a95ac4f16d32bbb74c983",
+   "support"
+  ],
+  "html/cross-origin/resources/navigate_usecredentials.sub.html.headers": [
+   "a84d3782037e7a0573f3b621941e293560792628",
+   "support"
+  ],
+  "html/cross-origin/resources/nothing.txt": [
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+   "support"
+  ],
+  "html/cross-origin/resources/nothing.txt.headers": [
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+   "support"
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+  "html/cross-origin/resources/popup_and_close.sub.html": [
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+   "support"
+  ],
+  "html/cross-origin/resources/popup_and_close.sub.html.headers": [
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+   "support"
+  ],
+  "html/cross-origin/usecredentials.tentative.html": [
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+   "testharness"
+  ],
+  "html/cross-origin/usecredentials.tentative.html.headers": [
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+   "support"
+  ],
   "html/dom/documents/dom-tree-accessors/Document.body.html": [
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    "testharness"
@@ -619681,6 +620204,10 @@
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    "reftest"
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+  "html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/mouse-cursor-imagemap.html": [
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+   "testharness"
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   "html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/no-help-cursor-on-links.historical.html": [
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@@ -630926,7 +631453,7 @@
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+   "6b8bd52a047ce411b968a79e6d0f7d152ab32a57",
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@@ -630946,7 +631473,7 @@
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@@ -631094,7 +631621,7 @@
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@@ -631281,6 +631808,10 @@
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+  "intersection-observer/root-margin-rounding.html": [
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+   "testharness"
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@@ -631662,7 +632193,7 @@
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@@ -632109,15 +632640,7 @@
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@@ -633313,6 +633836,10 @@
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   ],
+  "mediacapture-streams/MediaStream-MediaElement-firstframe.https.html": [
+   "1c6292458865bdeb3cfb5a64a7d4e4c9c215c866",
+   "testharness"
+  ],
   "mediacapture-streams/MediaStream-MediaElement-preload-none-manual.https.html": [
    "758a273bb192bea67776d432125d548bfebd5ff8",
    "manual"
@@ -659054,7 +659581,7 @@
    "support"
   ],
   "service-workers/service-worker/resources/load_worker.js": [
-   "2c80f25a3db2831f4b1e5633a455481d7a35b4c7",
+   "ba15ffe32daa7eb5cf6dba0ccf17245f63c0ad4c",
    "support"
   ],
   "service-workers/service-worker/resources/loaded.html": [
@@ -659594,7 +660121,7 @@
    "support"
   ],
   "service-workers/service-worker/resources/worker-interception-iframe.https.html": [
-   "84204a3ee5df1fc3a71784215071b14f0c65f9f2",
+   "9dd5a185e7e0ec3a751c24633cf9fc7e41837627",
    "support"
   ],
   "service-workers/service-worker/resources/worker-interception-redirect-serviceworker.js": [
@@ -659810,7 +660337,7 @@
    "testharness"
   ],
   "service-workers/service-worker/worker-interception.https.html": [
-   "7b2941263bf756c33e6d15b36ed96548f886c6c2",
+   "1776376e96c4cd6d44912f4496af1b35f049ee12",
    "testharness"
   ],
   "service-workers/service-worker/xhr-response-url.https.html": [
@@ -665497,6 +666024,14 @@
    "bb7c8206a116af9e7b242c4e9546d570cea6afd8",
    "reftest"
   ],
+  "svg/text/reftests/text-xml-space-001-ref.svg": [
+   "1572149cf68bde8c0e8c032b28d37ae95c64652a",
+   "support"
+  ],
+  "svg/text/reftests/text-xml-space-001.svg": [
+   "c58bd9d4e57cbe6891191aa8c67844cb63f73347",
+   "reftest"
+  ],
   "svg/text/reftests/textpath-shape-001-ref.svg": [
    "10827c85810cdf9dc7e70a665c289814d35ed219",
    "support"
@@ -665705,6 +666240,22 @@
    "1cc80a270e2c1e8f0bcb8dc4878a75d9ce01717a",
    "support"
   ],
+  "timing-entrytypes-registry/META.yml": [
+   "c09a6e03fd19f5a405b391c2c4671df6ff04edf1",
+   "support"
+  ],
+  "timing-entrytypes-registry/registry.any.js": [
+   "4db249b16bea55e678f62721ee1002b012fc0bbf",
+   "testharness"
+  ],
+  "timing-entrytypes-registry/registry.window.js": [
+   "21ef2230e9ebea5b853e243c51905b92098fcd95",
+   "testharness"
+  ],
+  "timing-entrytypes-registry/resources/utils.js": [
+   "0ec96057ad80928be183530e66f638b47e7d4c01",
+   "support"
+  ],
   "tools/.gitattributes": [
    "06a2c87a5e2c570243776a1c5a2feb82ebc42300",
    "support"
@@ -672562,7 +673113,7 @@
    "testharness"
   ],
   "user-timing/measure-with-dict.html": [
-   "e5869e1df8433c176e32b6d8589fe358985efc9d",
+   "1c46709765b11ec394e99ee454f4846aaf88e78d",
    "testharness"
   ],
   "user-timing/measure.html": [
@@ -675473,6 +676024,10 @@
    "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",
    "support"
   ],
+  "webaudio/the-audio-api/the-channelmergernode-interface/active-processing.https.html": [
+   "24932921e9b506f265440b57bfc3be79b5322bb3",
+   "testharness"
+  ],
   "webaudio/the-audio-api/the-channelmergernode-interface/audiochannelmerger-basic.html": [
    "71a62f176f8eefd9b9168b2c222cc6d1c752d3a5",
    "testharness"
@@ -676786,11 +677341,11 @@
    "support"
   ],
   "webdriver/tests/support/fixtures.py": [
-   "bd2381d2069ac64788446252d173ae1c052d5b71",
+   "9f8c983d49816e21c07541daa54cecddca7d206e",
    "support"
   ],
   "webdriver/tests/support/helpers.py": [
-   "c955135f814c580dd93a5272987e3e508d07609b",
+   "8bc53e7b4030dfdc6a78d11cb95915ea081eae73",
    "support"
   ],
   "webdriver/tests/support/http_request.py": [
@@ -676802,7 +677357,7 @@
    "support"
   ],
   "webdriver/tests/support/inline.py": [
-   "8b4f1657cffb193511da346bc4c236aac1d70308",
+   "639699809c1e3b77af6b1be9e384f2140e7b6630",
    "support"
   ],
   "webdriver/tests/support/merge_dictionaries.py": [
@@ -676817,6 +677372,10 @@
    "e69de29bb2d1d6434b8b29ae775ad8c2e48c5391",
    "support"
   ],
+  "webdriver/tests/switch_to_frame/cross_origin.py": [
+   "3e5bab191a8eaa0976065d94f657b207e83d8ef9",
+   "wdspec"
+  ],
   "webdriver/tests/switch_to_frame/switch.py": [
    "67b855a96d963ab03efa9495052767ec033b346f",
    "wdspec"
@@ -677645,6 +678204,10 @@
    "e170e4a2f87fc4c3260a7acd323a98e1adfa3726",
    "testharness"
   ],
+  "webrtc/RTCPeerConnection-mandatory-getStats.https.html": [
+   "fd8c74b918440b72faaa570753a9a6dc88e85dcc",
+   "testharness"
+  ],
   "webrtc/RTCPeerConnection-ondatachannel.html": [
    "2fd33ca541148ca6a7be5f5624e303795c7c458d",
    "testharness"
@@ -680254,11 +680817,11 @@
    "reftest"
   ],
   "webvtt/rendering/cues-with-video/processing-model/basic-ref.html": [
-   "89d7f35ef1f8a405f7fe8d307dd1c69e24866740",
+   "182bc69277be6e553873d115f3af1f4550090986",
    "support"
   ],
   "webvtt/rendering/cues-with-video/processing-model/basic.html": [
-   "983600bdf1889e15cc4341a348e15201a07055d3",
+   "ca77eb734bfa1f819c0a76b519946cf9af0488f7",
    "reftest"
   ],
   "webvtt/rendering/cues-with-video/processing-model/bidi/bidi_ruby-ref.html": [
@@ -680510,11 +681073,11 @@
    "reftest"
   ],
   "webvtt/rendering/cues-with-video/processing-model/line_0_is_top-ref.html": [
-   "7edb8876e0ec3cc63fa63eac6d99a01bf4f075f8",
+   "85f2a95fa8a263bbe9bad330db7470142fb8e6b5",
    "support"
   ],
   "webvtt/rendering/cues-with-video/processing-model/line_0_is_top.html": [
-   "2167f218f366dbd2ec008d2d5d49c59f75ace678",
+   "c780a223e73482adc68ba8d0dd664ff5972e5932",
    "reftest"
   ],
   "webvtt/rendering/cues-with-video/processing-model/line_1_wrapped_cue_grow_downwards-ref.html": [
@@ -681186,11 +681749,11 @@
    "reftest"
   ],
   "webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace-ref.html": [
-   "3aea69adc46fd7914307791260245cb3107f6da7",
+   "13705162368153d4950a83e5c881fc843ae5860b",
    "support"
   ],
   "webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace.html": [
-   "777ce661c2e8c3d82626914ec354c565480b6bf5",
+   "3989f2180a0462a0951dc949fb51c4e67872e0be",
    "reftest"
   ],
   "webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_outline_properties-ref.html": [
diff --git a/tests/wpt/metadata/css/css-animations/parsing/animation-timing-function-computed.html.ini b/tests/wpt/metadata/css/css-animations/parsing/animation-timing-function-computed.html.ini
new file mode 100644
index 00000000000..e414d490ff3
--- /dev/null
+++ b/tests/wpt/metadata/css/css-animations/parsing/animation-timing-function-computed.html.ini
@@ -0,0 +1,13 @@
+[animation-timing-function-computed.html]
+  [Property animation-timing-function value 'steps(2, jump-both)' computes to 'steps(2, jump-both)']
+    expected: FAIL
+
+  [Property animation-timing-function value 'steps(2, jump-none)' computes to 'steps(2, jump-none)']
+    expected: FAIL
+
+  [Property animation-timing-function value 'steps(2, jump-start)' computes to 'steps(2, jump-start)']
+    expected: FAIL
+
+  [Property animation-timing-function value 'steps(2, jump-end)' computes to 'steps(2)']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-animations/parsing/transition-timing-function-computed.html.ini b/tests/wpt/metadata/css/css-animations/parsing/transition-timing-function-computed.html.ini
new file mode 100644
index 00000000000..5a41ca5ad57
--- /dev/null
+++ b/tests/wpt/metadata/css/css-animations/parsing/transition-timing-function-computed.html.ini
@@ -0,0 +1,13 @@
+[transition-timing-function-computed.html]
+  [Property transition-timing-function value 'steps(2, jump-none)' computes to 'steps(2, jump-none)']
+    expected: FAIL
+
+  [Property transition-timing-function value 'steps(2, jump-start)' computes to 'steps(2, jump-start)']
+    expected: FAIL
+
+  [Property transition-timing-function value 'steps(2, jump-end)' computes to 'steps(2)']
+    expected: FAIL
+
+  [Property transition-timing-function value 'steps(2, jump-both)' computes to 'steps(2, jump-both)']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-backgrounds/parsing/border-color-computed.html.ini b/tests/wpt/metadata/css/css-backgrounds/parsing/border-color-computed.html.ini
new file mode 100644
index 00000000000..4fd1a9683e4
--- /dev/null
+++ b/tests/wpt/metadata/css/css-backgrounds/parsing/border-color-computed.html.ini
@@ -0,0 +1,13 @@
+[border-color-computed.html]
+  [Property border-color value 'red yellow' computes to 'rgb(255, 0, 0) rgb(255, 255, 0)']
+    expected: FAIL
+
+  [Property border-color value 'red yellow currentcolor' computes to 'rgb(255, 0, 0) rgb(255, 255, 0) rgb(0, 255, 0)']
+    expected: FAIL
+
+  [Property border-color value 'currentcolor' computes to 'rgb(0, 255, 0)']
+    expected: FAIL
+
+  [Property border-color value 'red yellow green blue' computes to 'rgb(255, 0, 0) rgb(255, 255, 0) rgb(0, 128, 0) rgb(0, 0, 255)']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-backgrounds/parsing/border-style-computed.html.ini b/tests/wpt/metadata/css/css-backgrounds/parsing/border-style-computed.html.ini
new file mode 100644
index 00000000000..f7eb5184b12
--- /dev/null
+++ b/tests/wpt/metadata/css/css-backgrounds/parsing/border-style-computed.html.ini
@@ -0,0 +1,13 @@
+[border-style-computed.html]
+  [Property border-style value 'none' computes to 'none']
+    expected: FAIL
+
+  [Property border-style value 'hidden dotted dashed' computes to 'hidden dotted dashed']
+    expected: FAIL
+
+  [Property border-style value 'inset outset' computes to 'inset outset']
+    expected: FAIL
+
+  [Property border-style value 'solid double groove ridge' computes to 'solid double groove ridge']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-backgrounds/parsing/border-width-computed.html.ini b/tests/wpt/metadata/css/css-backgrounds/parsing/border-width-computed.html.ini
new file mode 100644
index 00000000000..ff24d33e8b7
--- /dev/null
+++ b/tests/wpt/metadata/css/css-backgrounds/parsing/border-width-computed.html.ini
@@ -0,0 +1,19 @@
+[border-width-computed.html]
+  [Property border-width value '1px 2px 3px 4px' computes to '1px 2px 3px 4px']
+    expected: FAIL
+
+  [Property border-width value '0.5em' computes to '20px']
+    expected: FAIL
+
+  [Property border-width value '1px' computes to '1px']
+    expected: FAIL
+
+  [Property border-width value '1px 2px 3px' computes to '1px 2px 3px']
+    expected: FAIL
+
+  [Property border-width value '1px 2px' computes to '1px 2px']
+    expected: FAIL
+
+  [Property border-width value '2px thin medium thick' computes to '2px 1px 3px 5px']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/hyphens-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/hyphens-computed.html.ini
new file mode 100644
index 00000000000..5f9ade1908c
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/hyphens-computed.html.ini
@@ -0,0 +1,10 @@
+[hyphens-computed.html]
+  [Property hyphens value 'none' computes to 'none']
+    expected: FAIL
+
+  [Property hyphens value 'manual' computes to 'manual']
+    expected: FAIL
+
+  [Property hyphens value 'auto' computes to 'auto']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/letter-spacing-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/letter-spacing-computed.html.ini
new file mode 100644
index 00000000000..6828569d1c0
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/letter-spacing-computed.html.ini
@@ -0,0 +1,4 @@
+[letter-spacing-computed.html]
+  [Property letter-spacing value 'normal' computes to '0px']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/line-break-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/line-break-computed.html.ini
new file mode 100644
index 00000000000..9bccc62d419
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/line-break-computed.html.ini
@@ -0,0 +1,16 @@
+[line-break-computed.html]
+  [Property line-break value 'strict' computes to 'strict']
+    expected: FAIL
+
+  [Property line-break value 'loose' computes to 'loose']
+    expected: FAIL
+
+  [Property line-break value 'anywhere' computes to 'anywhere']
+    expected: FAIL
+
+  [Property line-break value 'normal' computes to 'normal']
+    expected: FAIL
+
+  [Property line-break value 'auto' computes to 'auto']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/tab-size-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/tab-size-computed.html.ini
new file mode 100644
index 00000000000..01c3c576866
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/tab-size-computed.html.ini
@@ -0,0 +1,25 @@
+[tab-size-computed.html]
+  [Property tab-size value '2.5' computes to '2.5']
+    expected: FAIL
+
+  [Property tab-size value '10px' computes to '10px']
+    expected: FAIL
+
+  [Property tab-size value '4' computes to '4']
+    expected: FAIL
+
+  [Property tab-size value '0px' computes to '0px']
+    expected: FAIL
+
+  [Property tab-size value 'calc(10px - 0.5em)' computes to '0px']
+    expected: FAIL
+
+  [Property tab-size value '0' computes to '0']
+    expected: FAIL
+
+  [Property tab-size value '16' computes to '16']
+    expected: FAIL
+
+  [Property tab-size value 'calc(10px + 0.5em)' computes to '30px']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/text-align-last-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/text-align-last-computed.html.ini
new file mode 100644
index 00000000000..96f920e032c
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/text-align-last-computed.html.ini
@@ -0,0 +1,25 @@
+[text-align-last-computed.html]
+  [Property text-align-last value 'justify' computes to 'justify']
+    expected: FAIL
+
+  [Property text-align-last value 'auto' computes to 'auto']
+    expected: FAIL
+
+  [Property text-align-last value 'end' computes to 'end']
+    expected: FAIL
+
+  [Property text-align-last value 'center' computes to 'center']
+    expected: FAIL
+
+  [Property text-align-last value 'start' computes to 'start']
+    expected: FAIL
+
+  [Property text-align-last value 'match-parent' computes to 'match-parent']
+    expected: FAIL
+
+  [Property text-align-last value 'right' computes to 'right']
+    expected: FAIL
+
+  [Property text-align-last value 'left' computes to 'left']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/text-indent-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/text-indent-computed.html.ini
new file mode 100644
index 00000000000..acb1aea64c9
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/text-indent-computed.html.ini
@@ -0,0 +1,13 @@
+[text-indent-computed.html]
+  [Property text-indent value '10px hanging' computes to '10px hanging']
+    expected: FAIL
+
+  [Property text-indent value 'each-line hanging calc(10px + 0.5em)' computes to '30px hanging each-line']
+    expected: FAIL
+
+  [Property text-indent value '20% each-line' computes to '20% each-line']
+    expected: FAIL
+
+  [Property text-indent value 'calc(50% + 60px) hanging each-line' computes to 'calc(50% + 60px) hanging each-line']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/text-justify-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/text-justify-computed.html.ini
new file mode 100644
index 00000000000..d7b982ed618
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/text-justify-computed.html.ini
@@ -0,0 +1,4 @@
+[text-justify-computed.html]
+  [Property text-justify value 'inter-character' computes to 'inter-character']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/white-space-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/white-space-computed.html.ini
new file mode 100644
index 00000000000..dbc4390d8bf
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/white-space-computed.html.ini
@@ -0,0 +1,4 @@
+[white-space-computed.html]
+  [Property white-space value 'break-spaces' computes to 'break-spaces']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-text/parsing/word-break-computed.html.ini b/tests/wpt/metadata/css/css-text/parsing/word-break-computed.html.ini
new file mode 100644
index 00000000000..dc7a2c8a123
--- /dev/null
+++ b/tests/wpt/metadata/css/css-text/parsing/word-break-computed.html.ini
@@ -0,0 +1,4 @@
+[word-break-computed.html]
+  [Property word-break value 'break-word' computes to 'break-word']
+    expected: FAIL
+
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 71b464db3b5..e9c54d5e353 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -315,21 +315,24 @@
   [<iframe>: combined response Content-Type: text/html;" text/plain]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/html;" text/plain]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/html */*]
     expected: FAIL
 
   [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/html;charset=gbk text/plain text/html]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: */* text/html]
-    expected: FAIL
-
   [<iframe>: combined response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
+  [<iframe>: combined response Content-Type: */* text/html]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html */*]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
index ef3edb78985..87c807a49ff 100644
--- a/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
+++ b/tests/wpt/metadata/fetch/nosniff/parsing-nosniff.window.js.ini
@@ -11,6 +11,3 @@
   [X-Content-Type-Options%3A%20nosniff%0C]
     expected: FAIL
 
-  [X-Content-Type-Options%3A%20%22nosniFF%22]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
similarity index 71%
rename from tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
rename to tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
index 385376c7321..dc2e45516de 100644
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_4.html.ini
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
@@ -1,4 +1,4 @@
-[traverse_the_history_4.html]
+[traverse_the_history_5.html]
   [Multiple history traversals, last would be aborted]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/html/cross-origin/anonymous.tentative.html.ini b/tests/wpt/metadata/html/cross-origin/anonymous.tentative.html.ini
new file mode 100644
index 00000000000..3220adb7f14
--- /dev/null
+++ b/tests/wpt/metadata/html/cross-origin/anonymous.tentative.html.ini
@@ -0,0 +1,31 @@
+[anonymous.tentative.html]
+  [Top-level with anonymous policy: navigating a frame to a null policy should fail.]
+    expected: FAIL
+
+  [Top-level with anonymous policy: creating a noopener popup with null policy should work.]
+    expected: FAIL
+
+  [Top-level popup with anonymous policy: Navigating the popup to a null policy should fail. (even opener window is closed)]
+    expected: FAIL
+
+  [Top-level popup with anonymous policy: Navigating the popup to a null policy should fail. (even when we clear the opener)]
+    expected: FAIL
+
+  [Top-level popup with anonymous policy: Navigating the popup to a null policy should fail.]
+    expected: FAIL
+
+  [Top-level noopener with anonymous policy: navigating to a different policy should work]
+    expected: FAIL
+
+  [Top-level with anonymous policy: creating a popup with null policy should fail.]
+    expected: FAIL
+
+  [Top-level with anonymous policy: navigating a frame from an anonymous policy to a null policy should fail.]
+    expected: FAIL
+
+  [Fetch policy: anonymous policy no-cors fetches should be changed to cors]
+    expected: FAIL
+
+  [Top-level with anonymous policy: navigating a frame from a use-credentials policy to a null policy should fail.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/cross-origin/null.tentative.html.ini b/tests/wpt/metadata/html/cross-origin/null.tentative.html.ini
new file mode 100644
index 00000000000..001c99472a1
--- /dev/null
+++ b/tests/wpt/metadata/html/cross-origin/null.tentative.html.ini
@@ -0,0 +1,4 @@
+[null.tentative.html]
+  [Top-level noopener popup with use-credentials policy: navigating to a different (null) policy should work]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/cross-origin/usecredentials.tentative.html.ini b/tests/wpt/metadata/html/cross-origin/usecredentials.tentative.html.ini
new file mode 100644
index 00000000000..aa4f282746e
--- /dev/null
+++ b/tests/wpt/metadata/html/cross-origin/usecredentials.tentative.html.ini
@@ -0,0 +1,10 @@
+[usecredentials.tentative.html]
+  [Top-level with use-credentials policy: navigating a frame from a use-credentials policy to a null policy should fail]
+    expected: FAIL
+
+  [Top-level with use-credentials policy: navigating a frame to a null policy should fail.]
+    expected: FAIL
+
+  [Top-level with use-credentials policy: navigating a frame from an anonymous policy to a null policy should fail.]
+    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
new file mode 100644
index 00000000000..8cc42056d34
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/non-active-document.html.ini
@@ -0,0 +1,10 @@
+[non-active-document.html]
+  [DOMParser]
+    expected: FAIL
+
+  [createHTMLDocument]
+    expected: FAIL
+
+  [<template>]
+    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 66bd350083b..a56bad443a2 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
@@ -1,4 +1,5 @@
 [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-channelmergernode-interface/active-processing.https.html.ini b/tests/wpt/metadata/webaudio/the-audio-api/the-channelmergernode-interface/active-processing.https.html.ini
new file mode 100644
index 00000000000..116273a1a34
--- /dev/null
+++ b/tests/wpt/metadata/webaudio/the-audio-api/the-channelmergernode-interface/active-processing.https.html.ini
@@ -0,0 +1,2 @@
+[active-processing.https.html]
+  expected: ERROR
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/web-platform-tests/beacon/headers/header-referrer-strict-origin-when-cross-origin.https.html b/tests/wpt/web-platform-tests/beacon/headers/header-referrer-strict-origin-when-cross-origin.https.html
index ef6a5984066..f3100350094 100644
--- a/tests/wpt/web-platform-tests/beacon/headers/header-referrer-strict-origin-when-cross-origin.https.html
+++ b/tests/wpt/web-platform-tests/beacon/headers/header-referrer-strict-origin-when-cross-origin.https.html
@@ -12,10 +12,10 @@
     <script src="/common/get-host-info.sub.js"></script>
     <script src="/beacon/headers/header-referrer.js"></script>
     <script>
-      var testBase = get_host_info().HTTPS_ORIGIN +  RESOURCES_DIR;
+      var testBase = get_host_info().HTTPS_REMOTE_ORIGIN +  RESOURCES_DIR;
       testReferrerHeader(testBase, referrerOrigin);
-      testBase = get_host_info().HTTP_ORIGIN + RESOURCES_DIR;
-      testReferrerHeader(testBase, "");
+      testBase = get_host_info().HTTP_REMOTE_ORIGIN + RESOURCES_DIR;
+      testReferrerHeader(testBase, "", true);
     </script>
   </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/beacon/headers/header-referrer-strict-origin.https.html b/tests/wpt/web-platform-tests/beacon/headers/header-referrer-strict-origin.https.html
index ef6a5984066..b65bc795d2c 100644
--- a/tests/wpt/web-platform-tests/beacon/headers/header-referrer-strict-origin.https.html
+++ b/tests/wpt/web-platform-tests/beacon/headers/header-referrer-strict-origin.https.html
@@ -15,7 +15,7 @@
       var testBase = get_host_info().HTTPS_ORIGIN +  RESOURCES_DIR;
       testReferrerHeader(testBase, referrerOrigin);
       testBase = get_host_info().HTTP_ORIGIN + RESOURCES_DIR;
-      testReferrerHeader(testBase, "");
+      testReferrerHeader(testBase, "", true);
     </script>
   </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/beacon/headers/header-referrer-unsafe-url.https.html b/tests/wpt/web-platform-tests/beacon/headers/header-referrer-unsafe-url.https.html
index 9a3bccfbbff..26a062ebd85 100644
--- a/tests/wpt/web-platform-tests/beacon/headers/header-referrer-unsafe-url.https.html
+++ b/tests/wpt/web-platform-tests/beacon/headers/header-referrer-unsafe-url.https.html
@@ -12,8 +12,10 @@
     <script src="/common/get-host-info.sub.js"></script>
     <script src="/beacon/headers/header-referrer.js"></script>
     <script>
-      var testBase = get_host_info().HTTP_ORIGIN + RESOURCES_DIR;
+      var testBase = get_host_info().HTTPS_ORIGIN +  RESOURCES_DIR;
       testReferrerHeader(testBase, referrerUrl);
+      testBase = get_host_info().HTTP_ORIGIN + RESOURCES_DIR;
+      testReferrerHeader(testBase, referrerUrl, true);
     </script>
   </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/beacon/headers/header-referrer.js b/tests/wpt/web-platform-tests/beacon/headers/header-referrer.js
index 026b091828c..ebd67df1d76 100644
--- a/tests/wpt/web-platform-tests/beacon/headers/header-referrer.js
+++ b/tests/wpt/web-platform-tests/beacon/headers/header-referrer.js
@@ -3,12 +3,15 @@ var RESOURCES_DIR = "/beacon/resources/";
 var referrerOrigin = self.location.origin + '/';
 var referrerUrl = self.location.href;
 
-function testReferrerHeader(testBase, expectedReferrer) {
+function testReferrerHeader(testBase, expectedReferrer, mayBeBlockedAsMixedContent = false) {
   var id = self.token();
   var testUrl = testBase + "inspect-header.py?header=referer&cmd=put&id=" + id;
 
   promise_test(function(test) {
-    assert_true(navigator.sendBeacon(testUrl), "SendBeacon Succeeded");
+    const sentBeacon = navigator.sendBeacon(testUrl);
+    if (mayBeBlockedAsMixedContent && !sentBeacon)
+      return Promise.resolve();
+    assert_true(sentBeacon, "SendBeacon Succeeded");
     return pollResult(expectedReferrer, id) .then(result => {
       assert_equals(result, expectedReferrer, "Correct referrer header result");
     });
diff --git a/tests/wpt/web-platform-tests/css/css-animations/parsing/animation-timing-function-computed.html b/tests/wpt/web-platform-tests/css/css-animations/parsing/animation-timing-function-computed.html
new file mode 100644
index 00000000000..ad69553c0b4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-animations/parsing/animation-timing-function-computed.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Animations: getComputedValue().animationTimingFunction</title>
+<link rel="help" href="https://drafts.csswg.org/css-animations/#propdef-animation-timing-function">
+<meta name="assert" content="animation-timing-function computed value is a computed <easing-function> list.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("animation-timing-function", "linear");
+
+test_computed_value("animation-timing-function", "ease");
+test_computed_value("animation-timing-function", "ease-in");
+test_computed_value("animation-timing-function", "ease-out");
+test_computed_value("animation-timing-function", "ease-in-out");
+test_computed_value("animation-timing-function", "cubic-bezier(0.1, 0.2, 0.8, 0.9)");
+test_computed_value("animation-timing-function", "cubic-bezier(0, -2, 1, 3)");
+test_computed_value("animation-timing-function", "cubic-bezier(0, 0.7, 1, 1.3)");
+
+
+test_computed_value("animation-timing-function", "steps(4, start)");
+test_computed_value("animation-timing-function", "steps(2, end)", "steps(2)");
+test_computed_value("animation-timing-function", "steps(2, jump-start)");
+test_computed_value("animation-timing-function", "steps(2, jump-end)", "steps(2)");
+test_computed_value("animation-timing-function", "steps(2, jump-both)");
+test_computed_value("animation-timing-function", "steps(2, jump-none)");
+
+test_computed_value("animation-timing-function", "linear, ease, linear");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-animations/parsing/transition-timing-function-computed.html b/tests/wpt/web-platform-tests/css/css-animations/parsing/transition-timing-function-computed.html
new file mode 100644
index 00000000000..8b2189ed538
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-animations/parsing/transition-timing-function-computed.html
@@ -0,0 +1,36 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Animations: getComputedValue().transitionTimingFunction</title>
+<link rel="help" href="https://drafts.csswg.org/css-transitions/#propdef-transition-timing-function">
+<meta name="assert" content="transition-timing-function computed value is a computed <easing-function> list.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("transition-timing-function", "linear");
+
+test_computed_value("transition-timing-function", "ease");
+test_computed_value("transition-timing-function", "ease-in");
+test_computed_value("transition-timing-function", "ease-out");
+test_computed_value("transition-timing-function", "ease-in-out");
+test_computed_value("transition-timing-function", "cubic-bezier(0.1, 0.2, 0.8, 0.9)");
+test_computed_value("transition-timing-function", "cubic-bezier(0, -2, 1, 3)");
+test_computed_value("transition-timing-function", "cubic-bezier(0, 0.7, 1, 1.3)");
+
+
+test_computed_value("transition-timing-function", "steps(4, start)");
+test_computed_value("transition-timing-function", "steps(2, end)", "steps(2)");
+test_computed_value("transition-timing-function", "steps(2, jump-start)");
+test_computed_value("transition-timing-function", "steps(2, jump-end)", "steps(2)");
+test_computed_value("transition-timing-function", "steps(2, jump-both)");
+test_computed_value("transition-timing-function", "steps(2, jump-none)");
+
+test_computed_value("transition-timing-function", "linear, ease, linear");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-color-computed.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-color-computed.html
new file mode 100644
index 00000000000..9aee70b5bdf
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-color-computed.html
@@ -0,0 +1,38 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Backgrounds and Borders: getComputedValue().borderColor</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#border-color">
+<meta name="assert" content="border-color computed value is the computed colors.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+  #target {
+    color: lime;
+  }
+</style>
+</head>
+<body>
+<div id="target"></div>
+<script>
+'use strict';
+const currentColor = "rgb(0, 255, 0)";
+const red = "rgb(255, 0, 0)";
+const yellow = "rgb(255, 255, 0)";
+const green = "rgb(0, 128, 0)";
+const blue = "rgb(0, 0, 255)";
+
+test_computed_value("border-color", "currentcolor", currentColor);
+test_computed_value("border-color", "red yellow", red + " " + yellow);
+test_computed_value("border-color", "red yellow currentcolor", red + " " + yellow + " " + currentColor);
+test_computed_value("border-color", "red yellow green blue", red + " " + yellow + " " + green + " " + blue);
+
+test_computed_value("border-top-color", "red", red);
+test_computed_value("border-right-color", "yellow", yellow);
+test_computed_value("border-bottom-color", "green", green);
+test_computed_value("border-left-color", "blue", blue);
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-outset-computed.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-outset-computed.html
new file mode 100644
index 00000000000..dc259ce8d09
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-outset-computed.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Backgrounds and Borders: getComputedValue().borderImageOutset</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#border-image-outset">
+<meta name="assert" content="border-image-outset computed value is four values, each a number or absolute length.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+  #target {
+    font-size: 40px;
+  }
+</style>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("border-image-outset", "1px");
+test_computed_value("border-image-outset", "1px 2");
+test_computed_value("border-image-outset", "1px 2 3px");
+test_computed_value("border-image-outset", "1px 2 3px 4");
+test_computed_value("border-image-outset", "0 calc(0.5em + 10px) 3 calc(-0.5em + 10px)", "0 30px 3 0px");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-repeat-computed.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-repeat-computed.html
new file mode 100644
index 00000000000..07aa949e972
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-repeat-computed.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Backgrounds and Borders: getComputedValue().borderImageRepeat</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#border-image-repeat">
+<meta name="assert" content="border-image-repeat computed value is specified keywords.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("border-image-repeat", "round");
+test_computed_value("border-image-repeat", "stretch repeat");
+test_computed_value("border-image-repeat", "round space");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-slice-computed.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-slice-computed.html
new file mode 100644
index 00000000000..9bc3801e4f5
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-slice-computed.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Backgrounds and Borders: getComputedValue().borderImageSlice</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#border-image-slice">
+<meta name="assert" content="border-image-slice computed value is four values, each either a number or percentage; plus a fill keyword if specified.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("border-image-slice", "1");
+test_computed_value("border-image-slice", "1 2%");
+test_computed_value("border-image-slice", "1 2% 3");
+test_computed_value("border-image-slice", "1 2% 3 4%");
+
+test_computed_value("border-image-slice", "1% 2 3% 4 fill");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-source-computed.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-source-computed.html
new file mode 100644
index 00000000000..59cc2a7e142
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-source-computed.html
@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Backgrounds and Borders: getComputedValue().borderImageSource</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#border-image-source">
+<meta name="assert" content="border-image-source computed value is the keyword none or the specified image with URIs made absolute.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("border-image-source", "none");
+test_computed_value("border-image-source", 'url("http://www.example.com/")');
+
+test(() => {
+  const target = document.getElementById('target');
+  target.style['border-image-source'] = 'url("a.b#c")';
+  const result = getComputedStyle(target)['border-image-source'];
+  const resolved = new URL("a.b#c", document.URL).href;
+  assert_equals(result, 'url("' + resolved + '")');
+}, 'url values are made absolute');
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-width-computed.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-width-computed.html
new file mode 100644
index 00000000000..62646921da7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-image-width-computed.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Backgrounds and Borders: getComputedValue().borderImageWidth</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#border-image-width">
+<meta name="assert" content="border-image-width computed value is four values, each either a number, the keyword auto, or a computed length-percentage value.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+  #target {
+    font-size: 40px;
+  }
+</style>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("border-image-width", "1");
+test_computed_value("border-image-width", "auto");
+test_computed_value("border-image-width", "10px");
+test_computed_value("border-image-width", "20%");
+test_computed_value("border-image-width", "calc(20% + 10px)");
+test_computed_value("border-image-width", "calc(-0.5em + 10px)", "0px");
+test_computed_value("border-image-width", "calc(0.5em + 10px)", "30px");
+test_computed_value("border-image-width", "1 auto");
+test_computed_value("border-image-width", "1 auto 10px");
+test_computed_value("border-image-width", "1 auto 10px 20%");
+test_computed_value("border-image-width", "20% 10px auto 1");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-style-computed.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-style-computed.html
new file mode 100644
index 00000000000..3e89f92dc40
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-style-computed.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Backgrounds and Borders: getComputedValue().borderStyle</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#border-style">
+<meta name="assert" content="border-style computed value is the specified keywords.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("border-style", "none");
+test_computed_value("border-style", "inset outset");
+test_computed_value("border-style", "hidden dotted dashed");
+test_computed_value("border-style", "solid double groove ridge");
+
+test_computed_value("border-top-style", "solid");
+test_computed_value("border-right-style", "double");
+test_computed_value("border-bottom-style", "groove");
+test_computed_value("border-left-style", "ridge");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-width-computed.html b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-width-computed.html
new file mode 100644
index 00000000000..9ca2484ca07
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-backgrounds/parsing/border-width-computed.html
@@ -0,0 +1,57 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Backgrounds and Borders: getComputedValue().borderWidth</title>
+<link rel="help" href="https://drafts.csswg.org/css-backgrounds/#border-width">
+<meta name="assert" content="border-width computed value is the absolute length; zero if the border style is none or hidden.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+  #box {
+    border-style: dotted; /* Avoid border-*-width computed style 0 */
+    border-top-width: thin;
+    border-right-width: medium;
+    border-bottom-width: thick;
+  }
+  #target {
+    border-style: dotted; /* Avoid border-*-width computed style 0 */
+    font-size: 40px;
+  }
+</style>
+</head>
+<body>
+<div id="box"></div>
+<div id="target"></div>
+<script>
+'use strict';
+const box = document.getElementById('box');
+const thinWidth = getComputedStyle(box).borderTopWidth;
+const mediumWidth = getComputedStyle(box).borderRightWidth;
+const thickWidth = getComputedStyle(box).borderBottomWidth;
+
+test_computed_value("border-width", "1px");
+test_computed_value("border-width", "1px 2px");
+test_computed_value("border-width", "1px 2px 3px");
+test_computed_value("border-width", "1px 2px 3px 4px");
+
+test_computed_value("border-width", "0.5em", "20px");
+test_computed_value("border-width", "2px thin medium thick", "2px " + thinWidth + " " + mediumWidth + " " + thickWidth);
+
+test_computed_value("border-top-width", "0px");
+test_computed_value("border-right-width", "10px");
+test_computed_value("border-bottom-width", "calc(-0.5em + 10px)", "0px");
+test_computed_value("border-left-width", "calc(0.5em + 10px)", "30px");
+
+test(() => {
+  const thin = Number(thinWidth.replace("px", ""));
+  const medium = Number(mediumWidth.replace("px", ""));
+  const thick = Number(thickWidth.replace("px", ""));
+  assert_less_than_equal(0, thin);
+  assert_less_than_equal(thin, medium);
+  assert_less_than_equal(medium, thick);
+}, "thin ≤ medium ≤ thick");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/contain-size-fieldset-002.html b/tests/wpt/web-platform-tests/css/css-contain/contain-size-fieldset-002.html
new file mode 100644
index 00000000000..54f6cb1f269
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/contain-size-fieldset-002.html
@@ -0,0 +1,26 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Containment Test: Size containment on fieldset</title>
+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
+<link rel="help" href="https://drafts.csswg.org/css-contain-1/#containment-size">
+<link rel="match" href="reference/contain-size-fieldset-002-ref.html">
+<meta name=assert content="Size containment does apply to fieldsets, thus their size is the same than if they don't have contents.">
+<style>
+#border {
+  border: 1px solid black;
+  width: min-content;
+}
+fieldset {
+  contain: size;
+  visibility: hidden;
+  height: 1px;
+}
+</style>
+
+<p>This test passes if it has the same output as the reference. You should see a black border box below.</p>
+<div id="border">
+  <fieldset>
+    <legend>legend</legend>
+    Fieldset contents are here.
+  </fieldset>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-contain/reference/contain-size-fieldset-002-ref.html b/tests/wpt/web-platform-tests/css/css-contain/reference/contain-size-fieldset-002-ref.html
new file mode 100644
index 00000000000..51ff6998b63
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-contain/reference/contain-size-fieldset-002-ref.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>CSS Containment Test: Reference file</title>
+<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
+<style>
+#border {
+  border: 1px solid black;
+  width: min-content;
+}
+fieldset {
+  visibility: hidden;
+  height: 1px;
+}
+</style>
+
+<p>This test passes if it has the same output as the reference. You should see a black border box below.</p>
+<div id="border">
+  <fieldset></fieldset>
+</div>
diff --git a/tests/wpt/web-platform-tests/css/css-flexbox/overflow-auto-001.html b/tests/wpt/web-platform-tests/css/css-flexbox/overflow-auto-001.html
new file mode 100644
index 00000000000..08c1bdbafab
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-flexbox/overflow-auto-001.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+
+<title>Tests that we consider main axis sizes to be definite in column flexboxes
+when the height is an explicit definite height, even if the container does
+not have a definite main axis size.</title>
+<link rel="author" title="Google LLC" href="https://www.google.com/">
+<link rel="help" href="https://drafts.csswg.org/css-flexbox/#algo-main-item">
+<link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+
+<style>
+/* Make it possible for red to appear in webkit/blink browsers. But the test
+ * still works in other browsers, you'll just get a grey scrollbar that
+ * shouldn't be there.
+ */
+::-webkit-scrollbar-track, ::-webkit-scrollbar-thumb, ::-webkit-scrollbar {
+  width: 10px;
+  background: red;
+}
+
+#flex {
+  display: flex;
+}
+
+#item {
+  height: 300px;
+  overflow: auto;
+  scrollbar-color: red;
+}
+
+#child {
+  height: 600px;
+}
+</style>
+
+<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+
+<div style="width: 100px; height: 100px; background: green;"></div>
+
+<div id="flex">
+  <div id="item">
+    <div id="child">
+      Text
+    </div>
+  </div>
+</div>
+
+<script>
+var item = document.getElementById('item');
+item.offsetHeight;
+item.style.width = 0;
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-font-loading/fontfaceset-no-root-element.html b/tests/wpt/web-platform-tests/css/css-font-loading/fontfaceset-no-root-element.html
new file mode 100644
index 00000000000..130019162f7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-font-loading/fontfaceset-no-root-element.html
@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<title>CSS Font Loading test: Load Document FontFaceSet font without documentElement</title>
+<link rel="help" href="https://drafts.csswg.org/css-font-loading/#font-face-set-load">
+<link rel="help" href="https://crbug.com/971035">
+<script>
+  test(() => {
+    document.documentElement.remove();
+    var face = new FontFace("Ahem", "url(/fonts/Ahem.ttf)");
+    document.fonts.add(face);
+    document.fonts.load("12px Ahem");
+  }, "Trigger font load after removing documentElement. Should not crash.");
+</script>
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-011-ref.html b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-011-ref.html
new file mode 100644
index 00000000000..54981d81068
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-011-ref.html
@@ -0,0 +1,24 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>CSS Multi-column Layout Test Reference: Test a bidi-override multi-column container with a dir=rtl column-span:all child</title>
+  <link rel="author" title="Ting-Yu Lin" href="tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+
+  <style>
+  article {
+    column-count: 1;
+    column-rule: 6px solid;
+    width: 400px;
+    outline: 1px solid black;
+  }
+  h3 {
+    /* "column-count: 1" makes this behave like a real spanner. */
+    outline: 1px solid blue;
+  }
+  </style>
+
+  <article>
+    <div>before</div><h3 dir="rtl">spanner</h3><div>after</div>
+  </article>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-011.html b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-011.html
new file mode 100644
index 00000000000..869a889fcb4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-011.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+  <meta charset="utf-8">
+  <title>CSS Multi-column Layout Test: Test a bidi-override multi-column container with a dir=rtl column-span:all child</title>
+  <link rel="author" title="Ting-Yu Lin" href="tlin@mozilla.com">
+  <link rel="author" title="Mozilla" href="http://www.mozilla.org/">
+  <link rel="help" href="https://drafts.csswg.org/css-multicol-1/#column-span">
+  <link rel="match" href="multicol-span-all-011-ref.html">
+  <meta name="assert" content="This test checks that the text is correctly split by 'dir=rtl' column-span:all child in a bidi-override multi-column container.">
+
+  <style>
+  article {
+    column-count: 2;
+    column-rule: 6px solid;
+    width: 400px;
+    outline: 1px solid black;
+    unicode-bidi: bidi-override; /* Needed to trigger bidi resolution. */
+  }
+  h3 {
+    column-span: all;
+    outline: 1px solid blue;
+  }
+  </style>
+
+  <article>
+    <div>before<h3 dir="rtl">spanner</h3>after</div>
+  </article>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-position/position-absolute-chrome-bug-001.html b/tests/wpt/web-platform-tests/css/css-position/position-absolute-chrome-bug-001.html
new file mode 100644
index 00000000000..3e8899a9409
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-position/position-absolute-chrome-bug-001.html
@@ -0,0 +1,58 @@
+<!doctype html>
+<html>
+<head>
+  <link rel="help" href="https://www.w3.org/TR/css-position-3/#def-cb">
+  <link rel="help" href="https://crbug.com/970171">
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+<style>
+  #container {
+    position: relative;
+    border: 1px solid black;
+  }
+  .narrow {
+    width: 200px;
+    height: 300px;
+  }
+  .wide {
+    width: 300px;
+    height: 200px;
+  }
+  #target {
+    background: green;
+    position: absolute;
+    width: 50px;
+    height: 30px;
+    left: 50%;
+    top: 50%;
+    margin-left: -25px;
+    margin-top: -15px;
+  }
+</style>
+</head>
+<body>
+<div id="container" class="narrow">
+  <button id="target"></button>
+</div>
+<script>
+  test( t => {
+    let container = document.querySelector("#container");
+    let target = document.querySelector("#target");
+    document.body.offsetTop;
+    // start off narrow
+    let narrow_left = target.offsetLeft;
+    let narrow_top = target.offsetTop;
+    // make it wide
+    container.classList.toggle("narrow");
+    container.classList.toggle("wide");
+    document.body.offsetTop;
+    // make it narrow again
+    container.classList.toggle("narrow");
+    container.classList.toggle("wide");
+    document.body.offsetTop;
+    assert_equals(target.offsetLeft, narrow_left);
+    assert_equals(target.offsetTop, narrow_top);
+  }, "absolute positioned button with percentage top gets positioned");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/hyphens-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/hyphens-computed.html
new file mode 100644
index 00000000000..61a3c1415da
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/hyphens-computed.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().hyphens</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-hyphens">
+<meta name="assert" content="hyphens computed value is specified keyword.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("hyphens", "none");
+test_computed_value("hyphens", "manual");
+test_computed_value("hyphens", "auto");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/letter-spacing-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/letter-spacing-computed.html
new file mode 100644
index 00000000000..8a5bbb43030
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/letter-spacing-computed.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().letterSpacing</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-letter-spacing">
+<meta name="assert" content="letter-spacing computed value is an absolute length.">
+<meta name="assert" content="'normal' computes to zero.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+  #target {
+    font-size: 40px;
+  }
+</style>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("letter-spacing", "normal", "0px");
+
+test_computed_value("letter-spacing", "10px");
+test_computed_value("letter-spacing", "-20px");
+test_computed_value("letter-spacing", "calc(10px - 0.5em)", "-10px");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/line-break-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/line-break-computed.html
new file mode 100644
index 00000000000..af06d821a74
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/line-break-computed.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().lineBreak</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-line-break">
+<meta name="assert" content="line-break computed value is specified keyword.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("line-break", "auto");
+test_computed_value("line-break", "loose");
+test_computed_value("line-break", "normal");
+test_computed_value("line-break", "strict");
+test_computed_value("line-break", "anywhere");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/overflow-wrap-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/overflow-wrap-computed.html
new file mode 100644
index 00000000000..469d1cc4737
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/overflow-wrap-computed.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().overflowWrap</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-overflow-wrap">
+<meta name="assert" content="overflow-wrap computed value is specified keyword.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("overflow-wrap", "normal");
+test_computed_value("overflow-wrap", "break-word");
+test_computed_value("overflow-wrap", "anywhere");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/tab-size-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/tab-size-computed.html
new file mode 100644
index 00000000000..aff25ad4c2b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/tab-size-computed.html
@@ -0,0 +1,31 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().tabSize</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-tab-size">
+<meta name="assert" content="tab-size computed value is the specified number or an absolute length.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+  #target {
+    font-size: 40px;
+  }
+</style>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("tab-size", "0");
+test_computed_value("tab-size", "16");
+test_computed_value("tab-size", "4");
+test_computed_value("tab-size", "2.5");
+
+test_computed_value("tab-size", "0px");
+test_computed_value("tab-size", "10px");
+test_computed_value("tab-size", "calc(10px + 0.5em)", "30px");
+test_computed_value("tab-size", "calc(10px - 0.5em)", "0px");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/text-align-last-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/text-align-last-computed.html
new file mode 100644
index 00000000000..5853c221277
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/text-align-last-computed.html
@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().textAlignLast</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-text-align-last">
+<meta name="assert" content="text-align-last computed value is specified keyword.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("text-align-last", "auto");
+test_computed_value("text-align-last", "start");
+test_computed_value("text-align-last", "end");
+test_computed_value("text-align-last", "left");
+test_computed_value("text-align-last", "right");
+test_computed_value("text-align-last", "center");
+test_computed_value("text-align-last", "justify");
+test_computed_value("text-align-last", "match-parent");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/text-indent-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/text-indent-computed.html
new file mode 100644
index 00000000000..f6da4964df9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/text-indent-computed.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().textIndent</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-text-indent">
+<meta name="assert" content="text-indent computed value is computed <length-percentage> value, plus any specified keywords.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+  #target {
+    font-size: 40px;
+  }
+</style>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("text-indent", "10px");
+test_computed_value("text-indent", "20%");
+test_computed_value("text-indent", "calc(50% + 60px)");
+test_computed_value("text-indent", "-30px");
+test_computed_value("text-indent", "-40%");
+test_computed_value("text-indent", "calc(10px - 0.5em)", "-10px");
+
+test_computed_value("text-indent", "10px hanging");
+test_computed_value("text-indent", "20% each-line");
+test_computed_value("text-indent", "calc(50% + 60px) hanging each-line");
+test_computed_value("text-indent", "each-line hanging calc(10px + 0.5em)", "30px hanging each-line");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/text-justify-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/text-justify-computed.html
new file mode 100644
index 00000000000..b219305d55e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/text-justify-computed.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().textJustify</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-text-justify">
+<meta name="assert" content="text-justify computed value is specified keyword.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("text-justify", "auto");
+test_computed_value("text-justify", "none");
+test_computed_value("text-justify", "inter-word");
+test_computed_value("text-justify", "inter-character");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/text-transform-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/text-transform-computed.html
new file mode 100644
index 00000000000..68f2278eb54
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/text-transform-computed.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().textTransform</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-text-transform">
+<meta name="assert" content="text-transform computed value is specified keywords.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("text-transform", "none");
+
+test_computed_value("text-transform", "capitalize");
+test_computed_value("text-transform", "uppercase");
+test_computed_value("text-transform", "lowercase");
+test_computed_value("text-transform", "full-width");
+test_computed_value("text-transform", "full-size-kana");
+
+test_computed_value("text-transform", "capitalize full-width");
+test_computed_value("text-transform", "full-width full-size-kana");
+
+test_computed_value("text-transform", "uppercase full-width full-size-kana");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/white-space-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/white-space-computed.html
new file mode 100644
index 00000000000..047a8037112
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/white-space-computed.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().whiteSpace</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-white-space">
+<meta name="assert" content="white-space computed value is specified keyword.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("white-space", "normal");
+test_computed_value("white-space", "pre");
+test_computed_value("white-space", "nowrap");
+test_computed_value("white-space", "pre-wrap");
+test_computed_value("white-space", "break-spaces");
+test_computed_value("white-space", "pre-line");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/word-break-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/word-break-computed.html
new file mode 100644
index 00000000000..b12a108fce4
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/word-break-computed.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().wordBreak</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-word-break">
+<meta name="assert" content="word-break computed value is specified keyword.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("word-break", "normal");
+test_computed_value("word-break", "keep-all");
+test_computed_value("word-break", "break-all");
+test_computed_value("word-break", "break-word");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/word-spacing-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/word-spacing-computed.html
new file mode 100644
index 00000000000..095b83b5e12
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/word-spacing-computed.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().wordSpacing</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-word-spacing">
+<meta name="assert" content="word-spacing computed value is an absolute length.">
+<meta name="assert" content="'normal' computes to zero.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+<style>
+  #target {
+    font-size: 40px;
+  }
+</style>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("word-spacing", "normal", "0px");
+
+test_computed_value("word-spacing", "10px");
+test_computed_value("word-spacing", "-20px");
+test_computed_value("word-spacing", "calc(10px - 0.5em)", "-10px");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/parsing/word-wrap-computed.html b/tests/wpt/web-platform-tests/css/css-text/parsing/word-wrap-computed.html
new file mode 100644
index 00000000000..bb79edec878
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/parsing/word-wrap-computed.html
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head>
+<meta charset="utf-8">
+<title>CSS Text: getComputedValue().wordWrap</title>
+<link rel="help" href="https://www.w3.org/TR/css-text-3/#propdef-word-wrap">
+<meta name="assert" content="word-wrap computed value is specified keyword.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/css/support/computed-testcommon.js"></script>
+</head>
+<body>
+<div id="target"></div>
+<script>
+test_computed_value("word-wrap", "normal");
+test_computed_value("word-wrap", "break-word");
+test_computed_value("word-wrap", "anywhere");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/css-text/word-break/word-break-break-word-crash-001.html b/tests/wpt/web-platform-tests/css/css-text/word-break/word-break-break-word-crash-001.html
new file mode 100644
index 00000000000..894a6f3aa0c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-text/word-break/word-break-break-word-crash-001.html
@@ -0,0 +1,39 @@
+<!DOCTYPE html>
+<title>Test float + nbsp + break-word does not freeze</title>
+<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=972421">
+<link rel="author" title="Koji Ishii" href="mailto:kojii@chromium.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<style>
+div {
+  font-size: 10px;
+  width: 10ch;
+  border: 2px solid blue;
+}
+float {
+  float: left;
+}
+.nowrap > div {
+  white-space: nowrap;
+}
+.break-word {
+  word-break: break-word;
+}
+</style>
+<body>
+  <section>
+    <div>123456<float></float>654321</div>
+    <div>123456<float></float>&nbsp;654321</div>
+  </section>
+  <section class="nowrap">
+    <div>123456<float></float>654321</div>
+    <div>123456<float></float>&nbsp;654321</div>
+  </section>
+  <section class="break-word">
+    <div>123456<float></float>654321</div>
+    <div>123456<float></float>&nbsp;654321</div>
+  </section>
+<script>test(() => {
+    document.body.offsetTop;  // layout should not freeze.
+});</script>
+</body>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/anonymous.tentative.html b/tests/wpt/web-platform-tests/html/cross-origin/anonymous.tentative.html
new file mode 100644
index 00000000000..ef9b9bb7b87
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/anonymous.tentative.html
@@ -0,0 +1,219 @@
+<!doctype html>
+<meta name="timeout" content="long">
+<title>Cross-Origin header and nested navigable resource without such header</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="/common/get-host-info.sub.js"></script>
+<div id=log></div>
+<script>
+async_test(t => {
+  const frame = document.createElement("iframe");
+  t.step_timeout(() => {
+    // Make sure the iframe didn't load.
+    assert_equals(frame.contentDocument, null);
+    t.done();
+  }, 500);
+  frame.src = "/common/blank.html";
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with anonymous policy: navigating a frame to a null policy should fail.");
+
+async_test(t => {
+  const frame = document.createElement("iframe");
+
+  const CHANNEL_NAME = "frame-anon-to-blank";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  bc.onmessage = t.step_func((event) => {
+    assert_not_equals(frame.contentDocument, null);
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+    t.step_timeout(() => {
+      assert_equals(frame.contentDocument, null, "Navigation to null policy should fail");
+      t.done();
+    }, 1500);
+  });
+
+  frame.src = `resources/navigate_anonymous.sub.html?channelName=${CHANNEL_NAME}&to=/common/blank.html`;
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with anonymous policy: navigating a frame from an anonymous policy to a null policy should fail.");
+
+
+async_test(t => {
+  const frame = document.createElement("iframe");
+
+  const CHANNEL_NAME = "frame-usecredentials-to-blank";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  bc.onmessage = t.step_func((event) => {
+    assert_not_equals(frame.contentDocument, null);
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+    t.step_timeout(() => {
+      assert_equals(frame.contentDocument, null, "Navigation to null policy should fail");
+      t.done();
+    }, 1500);
+  });
+  frame.src = `resources/navigate_usecredentials.sub.html?channelName=${CHANNEL_NAME}&to=/common/blank.html`;
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with anonymous policy: navigating a frame from a use-credentials policy to a null policy should fail.");
+
+async_test(t => {
+  let pageLoaded = false;
+  const CHANNEL_NAME = "anon-null-window-noopener";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  let finished = false;
+  bc.onmessage = t.step_func((event) => {
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+    pageLoaded = true;
+  });
+
+  const SECOND_CHANNEL = "anon-null-window-noopener-second";
+  let bc2 = new BroadcastChannel(SECOND_CHANNEL);
+  bc2.onmessage = t.step_func_done((event) => {
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+    assert_equals(pageLoaded, true, "Opening a null window (noopener) from anon window should work");
+  });
+
+  let win = window.open(`resources/navigate_null.sub.html?channelName=${CHANNEL_NAME}&to=navigate_null.sub.html?channelName=${SECOND_CHANNEL}`, "_blank", "noopener");
+}, "Top-level with anonymous policy: creating a noopener popup with null policy should work.");
+
+async_test(t => {
+  let pageLoaded = false;
+  const CHANNEL_NAME = "anon-null-window";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  bc.onmessage = t.step_func_done((event) => {
+    pageLoaded = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  let win = window.open(`resources/navigate_null.sub.html?channelName=${CHANNEL_NAME}&to=/common/blank.html`, "_blank");
+  t.add_cleanup(() => win.close());
+  t.step_timeout(() => {
+    assert_equals(pageLoaded, false, "Opening a null window from anon window should fail");
+    t.done();
+  }, 500);
+}, "Top-level with anonymous policy: creating a popup with null policy should fail.");
+
+async_test(t => {
+  let pageLoaded = false;
+  const CHANNEL_NAME = "anon-null-top-navigation";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  bc.onmessage = t.step_func((event) => {
+    pageLoaded = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  const SECOND_CHANNEL = "anon-null-top-navigation-final";
+  let bc2 = new BroadcastChannel(SECOND_CHANNEL);
+  bc2.onmessage = t.step_func_done((event) => {
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+    assert_equals(pageLoaded, true, "Opening a null window (noopener) from anon window should work");
+  });
+
+  let win = window.open(`resources/navigate_anonymous.sub.html?channelName=${CHANNEL_NAME}&to=navigate_null.sub.html?channelName=${SECOND_CHANNEL}`, "_blank", "noopener");
+
+}, "Top-level noopener with anonymous policy: navigating to a different policy should work");
+
+promise_test(t => {
+  let host_info = get_host_info();
+  return fetch(host_info.HTTP_REMOTE_ORIGIN+"/html/cross-origin/resources/nothing.txt",
+        {"mode": "no-cors", "method": "GET", "headers":{}}).then(r => {
+    assert_equals(r.type, "cors", "type should have been changed to cors");
+  });
+}, "Fetch policy: anonymous policy no-cors fetches should be changed to cors");
+
+
+async_test(t => {
+  let pageLoaded = false;
+  const CHANNEL_NAME = "anon-null-window";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  bc.onmessage = t.step_func_done((event) => {
+    pageLoaded = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  const SECOND_CHANNEL = "anon-null-window-second";
+  let navigated = false;
+  let bc2 = new BroadcastChannel(SECOND_CHANNEL);
+  bc2.onmessage = t.step_func((event) => {
+    navigated = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  let win = window.open(`resources/navigate_anonymous.sub.html?channelName=${CHANNEL_NAME}&to=navigate_null.sub.html?channelName=${SECOND_CHANNEL}`, "_blank");
+  t.add_cleanup(() => win.close());
+  t.step_timeout(() => {
+    assert_equals(pageLoaded, true, "Opening the popup window from anon window should work");
+    assert_equals(navigated, false, "Navigating the popup to a null policy should fail");
+    t.done();
+  }, 500);
+}, "Top-level popup with anonymous policy: Navigating the popup to a null policy should fail.");
+
+async_test(t => {
+  let pageLoaded = false;
+  const CHANNEL_NAME = "anon-null-window";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  bc.onmessage = t.step_func_done((event) => {
+    pageLoaded = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  const SECOND_CHANNEL = "anon-null-window-second";
+  let navigated = false;
+  let bc2 = new BroadcastChannel(SECOND_CHANNEL);
+  bc2.onmessage = t.step_func((event) => {
+    navigated = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  let win = window.open(`resources/navigate_anonymous.sub.html?clearOpener=true&channelName=${CHANNEL_NAME}&to=navigate_null.sub.html?channelName=${SECOND_CHANNEL}`, "_blank");
+  t.add_cleanup(() => win.close());
+  t.step_timeout(() => {
+    assert_equals(pageLoaded, true, "Opening the popup window from anon window should work");
+    assert_equals(navigated, false, "Navigating the popup to a null policy should fail");
+    t.done();
+  }, 500);
+}, "Top-level popup with anonymous policy: Navigating the popup to a null policy should fail. (even when we clear the opener)");
+
+async_test(t => {
+  let popupLoaded = false;
+  const CHANNEL_NAME = "anon-null-window-no-opener";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  bc.onmessage = t.step_func_done((event) => {
+    let payload = event.data;
+    if (payload == "loaded") {
+      t.step_timeout(() => {
+        assert_equals(popupLoaded, true, "Opening the popup window (noopener) from anon window should work");
+        assert_equals(navigated, false, "Navigating the popup to a null policy should fail");
+        t.done();
+      }, 500);
+    } else if (payload == "popup-loaded") {
+      popupLoaded = true;
+    } else {
+      assert_unreached(`unexpected payload ${payload}`);
+    }
+  });
+
+  const SECOND_CHANNEL = "anon-null-window-second-popup";
+  let navigated = false;
+  let bc2 = new BroadcastChannel(SECOND_CHANNEL);
+  bc2.onmessage = t.step_func((event) => {
+    navigated = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  let win = window.open(`resources/popup_and_close.sub.html?channelName=${CHANNEL_NAME}&to=navigate_null.sub.html?channelName=${SECOND_CHANNEL}`, "_blank", "noopener");
+}, "Top-level popup with anonymous policy: Navigating the popup to a null policy should fail. (even opener window is closed)");
+
+</script>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/anonymous.tentative.html.headers b/tests/wpt/web-platform-tests/html/cross-origin/anonymous.tentative.html.headers
new file mode 100644
index 00000000000..a76b601291e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/anonymous.tentative.html.headers
@@ -0,0 +1 @@
+Cross-Origin: anonymous
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/null.tentative.html b/tests/wpt/web-platform-tests/html/cross-origin/null.tentative.html
new file mode 100644
index 00000000000..ae871c4a273
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/null.tentative.html
@@ -0,0 +1,103 @@
+<!doctype html>
+<meta name="timeout" content="long">
+<title>Cross-Origin header and nested navigable resource without such header</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="/common/get-host-info.sub.js"></script>
+<div id=log></div>
+<script>
+async_test(t => {
+  const frame = document.createElement("iframe");
+  frame.onload = t.step_func_done(() => {
+    assert_not_equals(frame.contentDocument, null, "The frame should actually load");
+  });
+  frame.src = "/common/blank.html";
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with null policy: navigating a frame to a null policy should work.");
+
+async_test(t => {
+  const frame = document.createElement("iframe");
+  let firstNavOk = false;
+  frame.onload = t.step_func(() => {
+    assert_not_equals(frame.contentDocument, null);
+    firstNavOk = true;
+  });
+  t.step_timeout(() => {
+    assert_equals(firstNavOk, true, "The initial load should work");
+    assert_not_equals(frame.contentDocument, null, "Navigation to null policy should fail");
+    t.done();
+  }, 500);
+  frame.src = "resources/navigate_anonymous.sub.html?to=/common/blank.html";
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with null policy: parent policy should apply to frame navigation from use-credentials policy to a null. Should succeed.");
+
+async_test(t => {
+  const frame = document.createElement("iframe");
+  let firstNavOk = false;
+  frame.onload = t.step_func(() => {
+    assert_not_equals(frame.contentDocument, null);
+    firstNavOk = true;
+  });
+  t.step_timeout(() => {
+    assert_equals(firstNavOk, true, "The initial load should work");
+    assert_not_equals(frame.contentDocument, null, "Navigation to null policy should fail");
+    t.done();
+  }, 500);
+  frame.src = "resources/navigate_anonymous.sub.html?to=/common/blank.html";
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with null policy: parent policy should apply to frame navigation from anonymous policy to a null. Should succeed.");
+
+async_test(t => {
+  let w = window.open(`resources/navigate_null.sub.html?to=navigate_anonymous.sub.html`, "window_name");
+
+  t.add_cleanup(() => w.close());
+
+  t.step_timeout(() => {
+    w.history.back();
+    t.step_timeout(() => {
+      assert_not_equals(w.document, null);
+      t.done();
+    }, 500);
+  }, 500);
+}, "Top-level with null policy: navigating a frame back from a blocked page should work.");
+
+async_test(t => {
+  let pageLoaded = false;
+  const CHANNEL_NAME = "usecredentials-null-top-navigation";
+  let bc = new BroadcastChannel(CHANNEL_NAME);
+  let finished = false;
+  bc.onmessage = t.step_func((event) => {
+    pageLoaded = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  const SECOND_CHANNEL = "usecredentials-null-top-navigation-final";
+  let bc2 = new BroadcastChannel(SECOND_CHANNEL);
+  bc2.onmessage = t.step_func((event) => {
+    finished = true;
+    let payload = event.data;
+    assert_equals(payload, "loaded");
+  });
+
+  let win = window.open(`resources/navigate_usecredentials.sub.html?channelName=${CHANNEL_NAME}&to=navigate_null.sub.html?channelName=${SECOND_CHANNEL}`, "_blank", "noopener");
+
+  t.step_timeout(() => {
+    assert_equals(pageLoaded, true, "Opening a null window (noopener) from usecredentials window should work");
+    assert_equals(finished, true, "Navigating a top level window out of an usecredentials policy should work");
+    t.done();
+  }, 500);
+}, "Top-level noopener popup with use-credentials policy: navigating to a different (null) policy should work");
+
+promise_test(t => {
+  let host_info = get_host_info();
+  return fetch(host_info.HTTP_REMOTE_ORIGIN+"/html/cross-origin/resources/nothing.txt",
+        {"mode": "no-cors", "method": "GET", "headers":{}}).then(r => {
+    assert_equals(r.type, "opaque", "type should be opaque for cross origin fetch");
+  });
+}, "Fetch policy: null policy should not affect the no-cors mode");
+
+</script>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/null.tentative.html.headers b/tests/wpt/web-platform-tests/html/cross-origin/null.tentative.html.headers
new file mode 100644
index 00000000000..fd34f127d55
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/null.tentative.html.headers
@@ -0,0 +1 @@
+Cross-Origin: unknown-should-be-parsed-as-null
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_anonymous.sub.html b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_anonymous.sub.html
new file mode 100644
index 00000000000..d4b38bc1a10
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_anonymous.sub.html
@@ -0,0 +1,24 @@
+<!doctype html>
+<script>
+  let current = new URL(window.location.href);
+  let navigateTo = current.searchParams.get("to");
+  let channelName = current.searchParams.get("channelName");
+  let clearOpener = current.searchParams.get("clearOpener");
+
+  if (clearOpener) {
+    window.opener = null;
+  }
+
+  current.search = "";
+  if (navigateTo) {
+    let next = new URL(navigateTo, current);
+    setTimeout(() => {
+      window.location = next.href;
+    }, 50);
+  }
+
+  if (channelName) {
+    let bc = new BroadcastChannel(channelName);
+    bc.postMessage("loaded");
+  }
+</script>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_anonymous.sub.html.headers b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_anonymous.sub.html.headers
new file mode 100644
index 00000000000..a76b601291e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_anonymous.sub.html.headers
@@ -0,0 +1 @@
+Cross-Origin: anonymous
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_null.sub.html b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_null.sub.html
new file mode 100644
index 00000000000..1008f70ff12
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_null.sub.html
@@ -0,0 +1,18 @@
+<!doctype html>
+<script>
+  let current = new URL(window.location.href);
+  let navigateTo = current.searchParams.get("to");
+  let channelName = current.searchParams.get("channelName");
+  current.search = "";
+  if (navigateTo) {
+    let next = new URL(navigateTo, current);
+    setTimeout(() => {
+      window.location = next.href;
+    }, 50);
+  }
+
+  if (channelName) {
+    let bc = new BroadcastChannel(channelName);
+    bc.postMessage("loaded");
+  }
+</script>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_usecredentials.sub.html b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_usecredentials.sub.html
new file mode 100644
index 00000000000..1008f70ff12
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_usecredentials.sub.html
@@ -0,0 +1,18 @@
+<!doctype html>
+<script>
+  let current = new URL(window.location.href);
+  let navigateTo = current.searchParams.get("to");
+  let channelName = current.searchParams.get("channelName");
+  current.search = "";
+  if (navigateTo) {
+    let next = new URL(navigateTo, current);
+    setTimeout(() => {
+      window.location = next.href;
+    }, 50);
+  }
+
+  if (channelName) {
+    let bc = new BroadcastChannel(channelName);
+    bc.postMessage("loaded");
+  }
+</script>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_usecredentials.sub.html.headers b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_usecredentials.sub.html.headers
new file mode 100644
index 00000000000..a84d3782037
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/navigate_usecredentials.sub.html.headers
@@ -0,0 +1 @@
+Cross-Origin: use-credentials
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/nothing.txt b/tests/wpt/web-platform-tests/html/cross-origin/resources/nothing.txt
new file mode 100644
index 00000000000..9dafe9be209
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/nothing.txt
@@ -0,0 +1 @@
+nothing
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/nothing.txt.headers b/tests/wpt/web-platform-tests/html/cross-origin/resources/nothing.txt.headers
new file mode 100644
index 00000000000..cb762eff806
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/nothing.txt.headers
@@ -0,0 +1 @@
+Access-Control-Allow-Origin: *
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/popup_and_close.sub.html b/tests/wpt/web-platform-tests/html/cross-origin/resources/popup_and_close.sub.html
new file mode 100644
index 00000000000..2489fa8d247
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/popup_and_close.sub.html
@@ -0,0 +1,18 @@
+<!doctype html>
+<script>
+  let current = new URL(window.location.href);
+  let navigateTo = current.searchParams.get("to");
+  let channelName = current.searchParams.get("channelName");
+  let secondChannel = current.searchParams.get("secondChannel");
+
+  if (channelName) {
+    let bc = new BroadcastChannel(channelName);
+    bc.postMessage("popup-loaded");
+  }
+
+  let win = window.open(`navigate_anonymous.sub.html?channelName=${channelName}&to=navigate_null.sub.html?channelName=${secondChannel}`, "_blank");
+
+  setTimeout(() => {
+    window.close();
+  }, 10);
+</script>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/resources/popup_and_close.sub.html.headers b/tests/wpt/web-platform-tests/html/cross-origin/resources/popup_and_close.sub.html.headers
new file mode 100644
index 00000000000..a76b601291e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/resources/popup_and_close.sub.html.headers
@@ -0,0 +1 @@
+Cross-Origin: anonymous
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/usecredentials.tentative.html b/tests/wpt/web-platform-tests/html/cross-origin/usecredentials.tentative.html
new file mode 100644
index 00000000000..55c0f2235db
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/usecredentials.tentative.html
@@ -0,0 +1,54 @@
+<!doctype html>
+<meta name="timeout" content="long">
+<title>Cross-Origin header and nested navigable resource without such header</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<script>
+async_test(t => {
+  const frame = document.createElement("iframe");
+  t.step_timeout(() => {
+    // Make sure the iframe didn't load.
+    assert_equals(frame.contentDocument, null);
+    t.done();
+  }, 500);
+  frame.src = "/common/blank.html";
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with use-credentials policy: navigating a frame to a null policy should fail.");
+
+async_test(t => {
+  const frame = document.createElement("iframe");
+  let firstNavOk = false;
+  frame.onload = t.step_func(() => {
+    assert_not_equals(frame.contentDocument, null);
+    firstNavOk = true;
+  });
+  t.step_timeout(() => {
+    assert_equals(firstNavOk, true, "The initial load should work");
+    assert_equals(frame.contentDocument, null, "Navigation to null policy should fail");
+    t.done();
+  }, 500);
+  frame.src = "resources/navigate_usecredentials.sub.html?to=/common/blank.html";
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with use-credentials policy: navigating a frame from a use-credentials policy to a null policy should fail");
+
+async_test(t => {
+  const frame = document.createElement("iframe");
+  let firstNavOk = false;
+  frame.onload = t.step_func(() => {
+    assert_not_equals(frame.contentDocument, null);
+    firstNavOk = true;
+  });
+  t.step_timeout(() => {
+    assert_equals(firstNavOk, true, "The initial load should work");
+    assert_equals(frame.contentDocument, null, "Navigation to null policy should fail");
+    t.done();
+  }, 500);
+  frame.src = "resources/navigate_anonymous.sub.html?to=/common/blank.html";
+  document.body.append(frame);
+  assert_equals(frame.contentDocument.body.localName, "body");
+}, "Top-level with use-credentials policy: navigating a frame from an anonymous policy to a null policy should fail.");
+
+</script>
diff --git a/tests/wpt/web-platform-tests/html/cross-origin/usecredentials.tentative.html.headers b/tests/wpt/web-platform-tests/html/cross-origin/usecredentials.tentative.html.headers
new file mode 100644
index 00000000000..a84d3782037
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/cross-origin/usecredentials.tentative.html.headers
@@ -0,0 +1 @@
+Cross-Origin: use-credentials
diff --git a/tests/wpt/web-platform-tests/html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/mouse-cursor-imagemap.html b/tests/wpt/web-platform-tests/html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/mouse-cursor-imagemap.html
new file mode 100644
index 00000000000..78f69a28957
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/rendering/the-css-user-agent-style-sheet-and-presentational-hints/mouse-cursor-imagemap.html
@@ -0,0 +1,19 @@
+<!doctype html>
+<img usemap="#map" src="data:image/gif;base64,R0lGODlhAQABAIAAAOTm7AAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==" width="1000" height="1000" style="border: 1px solid black;">
+<map name="map">
+  <area id="clickable-area" shape="rect" coords="0,0,500,500" href="#" role="img">
+  <area id="nonclickable-area" shape="rect" coords="500,500,1000,1000" role="img"><!-- No href attribute.-->
+</map>
+
+<p>An unclickable (non-link) area should not show the link cursor when hovered.</p>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+test(function() {
+  let clickable = window.getComputedStyle(document.getElementById('clickable-area'));
+  let nonclickable = window.getComputedStyle(document.getElementById('nonclickable-area'));
+  assert_equals(clickable.getPropertyValue('cursor'), 'pointer');
+  assert_not_equals(nonclickable.getPropertyValue('cursor'), 'pointer');
+}, 'Only clickable areas should show the link cursor.');
+</script>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/interfaces/page-visibility.idl b/tests/wpt/web-platform-tests/interfaces/page-visibility.idl
index 28fda2cbc25..6b8bd52a047 100644
--- a/tests/wpt/web-platform-tests/interfaces/page-visibility.idl
+++ b/tests/wpt/web-platform-tests/interfaces/page-visibility.idl
@@ -4,7 +4,7 @@
 // Source: Page Visibility Level 2 (https://w3c.github.io/page-visibility/)
 
 enum VisibilityState {
-  "hidden", "visible", "prerender"
+  "hidden", "visible"
 };
 
 partial interface Document {
diff --git a/tests/wpt/web-platform-tests/interfaces/performance-timeline.idl b/tests/wpt/web-platform-tests/interfaces/performance-timeline.idl
index 51752b13958..8ded59d8a26 100644
--- a/tests/wpt/web-platform-tests/interfaces/performance-timeline.idl
+++ b/tests/wpt/web-platform-tests/interfaces/performance-timeline.idl
@@ -26,7 +26,7 @@ interface PerformanceObserver {
   void observe(optional PerformanceObserverInit options);
   void disconnect();
   PerformanceEntryList takeRecords();
-  static readonly attribute FrozenArray<DOMString> supportedEntryTypes;
+  [SameObject] static readonly attribute FrozenArray<DOMString> supportedEntryTypes;
 };
 
 dictionary PerformanceObserverInit {
diff --git a/tests/wpt/web-platform-tests/interfaces/web-nfc.idl b/tests/wpt/web-platform-tests/interfaces/web-nfc.idl
index a5709161bdb..26f32a04ac9 100644
--- a/tests/wpt/web-platform-tests/interfaces/web-nfc.idl
+++ b/tests/wpt/web-platform-tests/interfaces/web-nfc.idl
@@ -4,9 +4,8 @@
 // Source: Web NFC API (https://w3c.github.io/web-nfc/)
 
 dictionary NDEFMessage {
-  DOMString? serialNumber;
-  sequence<NDEFRecord> records;
   USVString url;
+  sequence<NDEFRecord> records;
 };
 
 typedef (DOMString or unrestricted double or ArrayBuffer or Dictionary) NDEFRecordData;
@@ -43,10 +42,12 @@ interface NFCReader : EventTarget {
 
 [Constructor(DOMString type, NFCReadingEventInit readingEventInitDict), SecureContext, Exposed=Window]
 interface NFCReadingEvent : Event {
+  readonly attribute DOMString serialNumber;
   readonly attribute NDEFMessage message;
 };
 
 dictionary NFCReadingEventInit : EventInit {
+  DOMString? serialNumber = "";
   required NDEFMessage message;
 };
 
diff --git a/tests/wpt/web-platform-tests/intersection-observer/root-margin-rounding.html b/tests/wpt/web-platform-tests/intersection-observer/root-margin-rounding.html
new file mode 100644
index 00000000000..f5e33230199
--- /dev/null
+++ b/tests/wpt/web-platform-tests/intersection-observer/root-margin-rounding.html
@@ -0,0 +1,31 @@
+<!doctype html>
+<meta name="viewport" content="width=device-width,initial-scale=1">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
+<link rel="author" title="Mozilla" href="https://mozilla.org">
+<link rel="help" href="https://w3c.github.io/IntersectionObserver/#dom-intersectionobserver-rootmargin">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1553673">
+<style>
+  html { width: 100vw; height: 100vh }
+</style>
+<script>
+const t = async_test("IntersectionObserver root margin cannot end up with negative rect (and thus non-intersecting) due to rounding");
+
+let remainingTests = 100;
+
+// This is just a best-effort test to catch issues.
+for (let i = 0; i < 100; ++i) {
+  let offset = i / 100;
+  let observer;
+  observer = new IntersectionObserver(t.step_func(function(entries) {
+    assert_equals(entries.length, 1);
+    assert_equals(entries[0].target, document.documentElement);
+    assert_true(entries[0].isIntersecting, "should be intersecting at " + offset);
+    if (!--remainingTests)
+      t.done();
+    observer.disconnect();
+  }), { rootMargin: `${-100 * (1 - offset)}% 0px ${-100 * offset}%` });
+  observer.observe(document.documentElement);
+}
+</script>
diff --git a/tests/wpt/web-platform-tests/lint.whitelist b/tests/wpt/web-platform-tests/lint.whitelist
index 583d6b29735..be52aa67c00 100644
--- a/tests/wpt/web-platform-tests/lint.whitelist
+++ b/tests/wpt/web-platform-tests/lint.whitelist
@@ -168,6 +168,7 @@ SET TIMEOUT: html/browsers/history/the-location-interface/*
 SET TIMEOUT: html/browsers/history/the-session-history-of-browsing-contexts/*
 SET TIMEOUT: html/browsers/offline/*
 SET TIMEOUT: html/browsers/the-window-object/*
+SET TIMEOUT: html/cross-origin/resources/*
 SET TIMEOUT: html/editing/dnd/*
 SET TIMEOUT: html/semantics/embedded-content/the-iframe-element/*
 SET TIMEOUT: html/semantics/embedded-content/the-img-element/*
@@ -670,6 +671,8 @@ CSS-COLLIDING-REF-NAME: css/vendor-imports/mozilla/mozilla-central-reftests/cont
 CSS-COLLIDING-SUPPORT-NAME: css/css-backgrounds/support/red.png
 CSS-COLLIDING-REF-NAME: css/css-contain/reference/contain-size-fieldset-001-ref.html
 CSS-COLLIDING-REF-NAME: css/vendor-imports/mozilla/mozilla-central-reftests/contain/contain-size-fieldset-001-ref.html
+CSS-COLLIDING-REF-NAME: css/css-contain/reference/contain-size-fieldset-002-ref.html
+CSS-COLLIDING-REF-NAME: css/vendor-imports/mozilla/mozilla-central-reftests/contain/contain-size-fieldset-002-ref.html
 CSS-COLLIDING-SUPPORT-NAME: css/compositing/mix-blend-mode/support/red.png
 CSS-COLLIDING-SUPPORT-NAME: css/compositing/background-blending/support/red.png
 CSS-COLLIDING-SUPPORT-NAME: css/CSS2/normal-flow/support/replaced-min-max-3.png
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-2-ref.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-2-ref.html
deleted file mode 100644
index 9fca6f49632..00000000000
--- a/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-2-ref.html
+++ /dev/null
@@ -1,14 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-<meta charset="utf-8"/>
-<title>MathML lengths (reference)</title>
-</head>
-<body>
-  <p>Test passes if there is a green square and no red.</p>
-  <div>
-    <div id="red" style="position: absolute; width: 200px; height: 200px; background: green;">
-    </div>
-  </div>
-</body>
-</html>
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-2.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-2.html
index 37cc640b307..aa38e9729de 100644
--- a/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-2.html
+++ b/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-2.html
@@ -1,122 +1,159 @@
 <!DOCTYPE html>
 <html>
 <head>
-<meta charset="utf-8"/>
+<meta charset="utf-8">
 <title>MathML lengths</title>
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#cssstyling"/>
-<link rel="match" href="lengths-2-ref.html"/>
-<meta name="assert" content="Verify whether the different namedspaces are accepted for MathML lengths.">
+<meta name="assert" content="Verify various cases of the MathML length syntax.">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
 <style>
   @font-face {
     font-family: TestFont;
     src: url("/fonts/math/xheight500.woff");
   }
-  mpadded {
+  math {
     font-family: TestFont;
-    font-size: 200px; /* 1em = 200px */
-  }
-  div {
-    position: absolute;
-  }
-  #red mspace {
-    background: red;
-  }
-  #green mspace {
-    background: green;
+    font-size: 10px;
   }
 </style>
+<script>
+  var epsilon = .5;
+
+  function getBox(aId) {
+    return document.getElementById(aId).getBoundingClientRect();
+  }
+
+  setup({ explicit_done: true });
+  window.addEventListener("load", function() {
+    // Delay the check to workaround WebKit's bug https://webkit.org/b/174030.
+    requestAnimationFrame(() => { document.fonts.ready.then(runTests); });
+  });
+
+  function runTests() {
+    test(function() {
+      assert_equals(getBox("unitCm").width, 96, "cm");
+      assert_equals(getBox("unitEm").width, 120, "em");
+      assert_equals(getBox("unitEx").width, 500, "ex");
+      assert_equals(getBox("unitIn").width, 288, "in");
+      assert_equals(getBox("unitNamed").width, 700, "namedspace");
+      assert_equals(getBox("unitMm").width, 576, "mm");
+      assert_equals(getBox("unitPc").width, 96, "pc");
+      assert_equals(getBox("unitPercentage").width, 60, "%");
+      assert_equals(getBox("unitPt").width, 96, "pt");
+      assert_equals(getBox("unitPx").width, 123, "px");
+      assert_equals(getBox("unitNone").width, 150, "Unitless");
+    }, "Units");
+
+    test(function() {
+      assert_equals(getBox("spaceCm").width, 96, "cm");
+      assert_equals(getBox("spaceEm").width, 120, "em");
+      assert_equals(getBox("spaceEx").width, 500, "ex");
+      assert_equals(getBox("spaceIn").width, 288, "in");
+      assert_equals(getBox("spaceNamed").width, 700, "namedspace");
+      assert_equals(getBox("spaceMm").width, 576, "mm");
+      assert_equals(getBox("spacePc").width, 96, "pc");
+      assert_equals(getBox("spacePercentage").width, 60, "%");
+      assert_equals(getBox("spacePt").width, 96, "pt");
+      assert_equals(getBox("spacePx").width, 123, "px");
+      assert_equals(getBox("spaceNone").width, 150, "Unitless");
+    }, "Trimming of space");
+
+    test(function() {
+      assert_approx_equals(getBox("n0").width, 0, epsilon, "n0");
+      assert_approx_equals(getBox("n1").width, 90, epsilon, "n1");
+      assert_approx_equals(getBox("n2").width, 8, epsilon, "n2");
+      assert_approx_equals(getBox("n3").width, 70, epsilon, "n3");
+      assert_approx_equals(getBox("n4").width, 650, epsilon, "n4");
+      assert_approx_equals(getBox("n5").width, 4320, epsilon, "n5");
+      assert_approx_equals(getBox("n6").width, 1, epsilon, "n6");
+      assert_approx_equals(getBox("n7").width, 8, epsilon, "n7");
+      assert_approx_equals(getBox("n8").width, 65, epsilon, "n8");
+      assert_approx_equals(getBox("n9").width, 432, epsilon, "n9");
+      assert_approx_equals(getBox("n10").width, 123, epsilon, "n10");
+    }, "Non-negative numbers");
+
+    test(function() {
+      var topRef = getBox("ref").top;
+      assert_approx_equals(getBox("N0").top - topRef, -0, epsilon, "N0");
+      assert_approx_equals(topRef - getBox("N1").top, -90, epsilon, "N1");
+      assert_approx_equals(topRef - getBox("N2").top, -8, epsilon, "N2");
+      assert_approx_equals(topRef - getBox("N3").top, -70, epsilon, "N3");
+      assert_approx_equals(topRef - getBox("N4").top, -650, epsilon, "N4");
+      assert_approx_equals(topRef - getBox("N5").top, -4320, epsilon, "N5");
+      assert_approx_equals(topRef - getBox("N6").top, -1, epsilon, "N6");
+      assert_approx_equals(topRef - getBox("N7").top, -8, epsilon, "N7");
+      assert_approx_equals(topRef - getBox("N8").top, -65, epsilon, "N8");
+      assert_approx_equals(topRef - getBox("N9").top, -432, epsilon, "N9");
+      assert_approx_equals(topRef - getBox("N10").top, -123, epsilon, "N10");
+    }, "Non-positive numbers");
+
+    done();
+  }
+</script>
 </head>
 <body>
-  <p>Test passes if there is a green square and no red.</p>
-  <div>
-    <div id="red" style="position: absolute; width: 200px; height: 200px; background: green;">
-      <!-- veryverythinmathspace -->
-      <div style="left: 0px;"><math><mpadded height="100px" depth="100px" voffset="1veryverythinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 10px;"><math><mpadded height="100px" depth="100px" voffset="0.05555555555555556em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- verythinmathspace -->
-      <div style="left: 20px;"><math><mpadded height="100px" depth="100px" voffset="1verythinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 30px;"><math><mpadded height="100px" depth="100px" voffset="0.1111111111111111em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- thinmathspace -->
-      <div style="left: 40px;"><math><mpadded height="100px" depth="100px" voffset="1thinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 50px;"><math><mpadded height="100px" depth="100px" voffset="0.1666666666666667em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- mediummathspace -->
-      <div style="left: 60px;"><math><mpadded height="100px" depth="100px" voffset="1mediummathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 70px;"><math><mpadded height="100px" depth="100px" voffset="0.2222222222222222em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- thickmathspace -->
-      <div style="left: 80px;"><math><mpadded height="100px" depth="100px" voffset="1thickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 90px;"><math><mpadded height="100px" depth="100px" voffset="0.2777777777777778em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- verythickmathspace -->
-      <div style="left: 100px;"><math><mpadded height="100px" depth="100px" voffset="1verythickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 110px;"><math><mpadded height="100px" depth="100px" voffset="0.3333333333333333em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- veryverythickmathspace -->
-      <div style="left: 120px;"><math><mpadded height="100px" depth="100px" voffset="1veryverythickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 130px;"><math><mpadded height="100px" depth="100px" voffset="0.3888888888888889em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativeveryverythinmathspace -->
-      <div style="left: 0px;"><math><mpadded height="100px" depth="100px" voffset="1negativeveryverythinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 10px;"><math><mpadded height="100px" depth="100px" voffset="-0.05555555555555556em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativeverythinmathspace -->
-      <div style="left: 20px;"><math><mpadded height="100px" depth="100px" voffset="1negativeverythinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 30px;"><math><mpadded height="100px" depth="100px" voffset="-0.1111111111111111em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativethinmathspace -->
-      <div style="left: 40px;"><math><mpadded height="100px" depth="100px" voffset="1negativethinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 50px;"><math><mpadded height="100px" depth="100px" voffset="-0.1666666666666667em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativemediummathspace -->
-      <div style="left: 60px;"><math><mpadded height="100px" depth="100px" voffset="1negativemediummathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 70px;"><math><mpadded height="100px" depth="100px" voffset="-0.2222222222222222em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativethickmathspace -->
-      <div style="left: 80px;"><math><mpadded height="100px" depth="100px" voffset="1negativethickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 90px;"><math><mpadded height="100px" depth="100px" voffset="-0.2777777777777778em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativeverythickmathspace -->
-      <div style="left: 100px;"><math><mpadded height="100px" depth="100px" voffset="1negativeverythickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 110px;"><math><mpadded height="100px" depth="100px" voffset="-0.3333333333333333em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativeveryverythickmathspace -->
-      <div style="left: 120px;"><math><mpadded height="100px" depth="100px" voffset="1negativeveryverythickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 130px;"><math><mpadded height="100px" depth="100px" voffset="-0.3888888888888889em"><mspace width="10px" height="10px"/></mpadded></math></div>
-    </div>
-    <div id="green" style="position: absolute; width: 200px; height: 200px;">
-      <!-- veryverythinmathspace -->
-      <div style="left: 10px;"><math><mpadded height="100px" depth="100px" voffset="1veryverythinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 0px;"><math><mpadded height="100px" depth="100px" voffset="0.05555555555555556em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- verythinmathspace -->
-      <div style="left: 30px;"><math><mpadded height="100px" depth="100px" voffset="1verythinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 20px;"><math><mpadded height="100px" depth="100px" voffset="0.1111111111111111em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- thinmathspace -->
-      <div style="left: 50px;"><math><mpadded height="100px" depth="100px" voffset="1thinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 40px;"><math><mpadded height="100px" depth="100px" voffset="0.1666666666666667em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- mediummathspace -->
-      <div style="left: 70px;"><math><mpadded height="100px" depth="100px" voffset="1mediummathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 60px;"><math><mpadded height="100px" depth="100px" voffset="0.2222222222222222em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- thickmathspace -->
-      <div style="left: 90px;"><math><mpadded height="100px" depth="100px" voffset="1thickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 80px;"><math><mpadded height="100px" depth="100px" voffset="0.2777777777777778em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- verythickmathspace -->
-      <div style="left: 110px;"><math><mpadded height="100px" depth="100px" voffset="1verythickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 100px;"><math><mpadded height="100px" depth="100px" voffset="0.3333333333333333em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- veryverythickmathspace -->
-      <div style="left: 130px;"><math><mpadded height="100px" depth="100px" voffset="1veryverythickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 120px;"><math><mpadded height="100px" depth="100px" voffset="0.3888888888888889em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativeveryverythinmathspace -->
-      <div style="left: 10px;"><math><mpadded height="100px" depth="100px" voffset="1negativeveryverythinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 0px;"><math><mpadded height="100px" depth="100px" voffset="-0.05555555555555556em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativeverythinmathspace -->
-      <div style="left: 30px;"><math><mpadded height="100px" depth="100px" voffset="1negativeverythinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 20px;"><math><mpadded height="100px" depth="100px" voffset="-0.1111111111111111em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativethinmathspace -->
-      <div style="left: 50px;"><math><mpadded height="100px" depth="100px" voffset="1negativethinmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 40px;"><math><mpadded height="100px" depth="100px" voffset="-0.1666666666666667em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativemediummathspace -->
-      <div style="left: 70px;"><math><mpadded height="100px" depth="100px" voffset="1negativemediummathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 60px;"><math><mpadded height="100px" depth="100px" voffset="-0.2222222222222222em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativethickmathspace -->
-      <div style="left: 90px;"><math><mpadded height="100px" depth="100px" voffset="1negativethickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 80px;"><math><mpadded height="100px" depth="100px" voffset="-0.2777777777777778em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativeverythickmathspace -->
-      <div style="left: 110px;"><math><mpadded height="100px" depth="100px" voffset="1negativeverythickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 100px;"><math><mpadded height="100px" depth="100px" voffset="-0.3333333333333333em"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <!-- negativeveryverythickmathspace -->
-      <div style="left: 130px;"><math><mpadded height="100px" depth="100px" voffset="1negativeveryverythickmathspace"><mspace width="10px" height="10px"/></mpadded></math></div>
-      <div style="left: 120px;"><math><mpadded height="100px" depth="100px" voffset="-0.3888888888888889em"><mspace width="10px" height="10px"/></mpadded></math></div>
-    </div>
-  </div>
+  <div id="log"></div>
+  <p>
+    <math>
+      <mspace id="unitCm" width="2.54cm"/>
+      <mspace id="unitEm" width="12em"/>
+      <mspace id="unitEx" width="100ex"/>
+      <mspace id="unitIn" width="3in"/>
+      <mspace style="font-size: 1800px" id="unitNamed" width="veryverythickmathspace"/>
+      <mspace id="unitMm" width="152.4mm"/>
+      <mspace id="unitPc" width="6pc"/>
+      <mstyle mathsize="200%"><mspace id="unitPercentage" width="3em"/></mstyle>
+      <mspace id="unitPt" width="72pt"/>
+      <mspace id="unitPx" width="123px"/>
+      <mstyle mathsize="5"><mspace id="unitNone" width="3em"/></mstyle>
+    </math>
+  </p>
+  <p>
+    <math>
+      <mspace id="spaceCm" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;2.54cm&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mspace id="spaceEm" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;12em&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mspace id="spaceEx" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;100ex&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mspace id="spaceIn" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;3in&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mspace style="font-size: 1800px" id="spaceNamed" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;veryverythickmathspace&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mspace id="spaceMm" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;152.4mm&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mspace id="spacePc" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;6pc&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mstyle mathsize="200%"><mspace id="spacePercentage" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;3em&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/></mstyle>
+      <mspace id="spacePt" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;72pt&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mspace id="spacePx" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;123px&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
+      <mstyle mathsize="5"><mspace id="spaceNone" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;3em&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/></mstyle>
+    </math>
+  </p>
+  <p>
+    <math>
+      <mspace id="n0" width="0em"/>
+      <mspace id="n1" width="9em"/>
+      <mspace id="n2" width=".8em"/>
+      <mspace id="n3" width="7.em"/>
+      <mspace id="n4" width="65em"/>
+      <mspace id="n5" width="432em"/>
+      <mspace id="n6" width=".10em"/>
+      <mspace id="n7" width=".789em"/>
+      <mspace id="n8" width="6.5em"/>
+      <mspace id="n9" width="43.21em"/>
+      <mspace id="n10" width="012.345em"/>
+    </math>
+  </p>
+  <p>
+    <math>
+      <mspace id="ref"></mspace>
+      <mpadded voffset="-0em"><mspace id="N0"/></mpadded>
+      <mpadded voffset="-9em"><mspace id="N1"/></mpadded>
+      <mpadded voffset="-.8em"><mspace id="N2"/></mpadded>
+      <mpadded voffset="-7.em"><mspace id="N3"/></mpadded>
+      <mpadded voffset="-65em"><mspace id="N4"/></mpadded>
+      <mpadded voffset="-432em"><mspace id="N5"/></mpadded>
+      <mpadded voffset="-.10em"><mspace id="N6"/></mpadded>
+      <mpadded voffset="-.789em"><mspace id="N7"/></mpadded>
+      <mpadded voffset="-6.5em"><mspace id="N8"/></mpadded>
+      <mpadded voffset="-43.21em"><mspace id="N9"/></mpadded>
+      <mpadded voffset="-012.345em"><mspace id="N10"/></mpadded>
+    </math>
+  </p>
 </body>
 </html>
diff --git a/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-3.html b/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-3.html
deleted file mode 100644
index aa38e9729de..00000000000
--- a/tests/wpt/web-platform-tests/mathml/relations/css-styling/lengths-3.html
+++ /dev/null
@@ -1,159 +0,0 @@
-<!DOCTYPE html>
-<html>
-<head>
-<meta charset="utf-8">
-<title>MathML lengths</title>
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#cssstyling"/>
-<meta name="assert" content="Verify various cases of the MathML length syntax.">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<style>
-  @font-face {
-    font-family: TestFont;
-    src: url("/fonts/math/xheight500.woff");
-  }
-  math {
-    font-family: TestFont;
-    font-size: 10px;
-  }
-</style>
-<script>
-  var epsilon = .5;
-
-  function getBox(aId) {
-    return document.getElementById(aId).getBoundingClientRect();
-  }
-
-  setup({ explicit_done: true });
-  window.addEventListener("load", function() {
-    // Delay the check to workaround WebKit's bug https://webkit.org/b/174030.
-    requestAnimationFrame(() => { document.fonts.ready.then(runTests); });
-  });
-
-  function runTests() {
-    test(function() {
-      assert_equals(getBox("unitCm").width, 96, "cm");
-      assert_equals(getBox("unitEm").width, 120, "em");
-      assert_equals(getBox("unitEx").width, 500, "ex");
-      assert_equals(getBox("unitIn").width, 288, "in");
-      assert_equals(getBox("unitNamed").width, 700, "namedspace");
-      assert_equals(getBox("unitMm").width, 576, "mm");
-      assert_equals(getBox("unitPc").width, 96, "pc");
-      assert_equals(getBox("unitPercentage").width, 60, "%");
-      assert_equals(getBox("unitPt").width, 96, "pt");
-      assert_equals(getBox("unitPx").width, 123, "px");
-      assert_equals(getBox("unitNone").width, 150, "Unitless");
-    }, "Units");
-
-    test(function() {
-      assert_equals(getBox("spaceCm").width, 96, "cm");
-      assert_equals(getBox("spaceEm").width, 120, "em");
-      assert_equals(getBox("spaceEx").width, 500, "ex");
-      assert_equals(getBox("spaceIn").width, 288, "in");
-      assert_equals(getBox("spaceNamed").width, 700, "namedspace");
-      assert_equals(getBox("spaceMm").width, 576, "mm");
-      assert_equals(getBox("spacePc").width, 96, "pc");
-      assert_equals(getBox("spacePercentage").width, 60, "%");
-      assert_equals(getBox("spacePt").width, 96, "pt");
-      assert_equals(getBox("spacePx").width, 123, "px");
-      assert_equals(getBox("spaceNone").width, 150, "Unitless");
-    }, "Trimming of space");
-
-    test(function() {
-      assert_approx_equals(getBox("n0").width, 0, epsilon, "n0");
-      assert_approx_equals(getBox("n1").width, 90, epsilon, "n1");
-      assert_approx_equals(getBox("n2").width, 8, epsilon, "n2");
-      assert_approx_equals(getBox("n3").width, 70, epsilon, "n3");
-      assert_approx_equals(getBox("n4").width, 650, epsilon, "n4");
-      assert_approx_equals(getBox("n5").width, 4320, epsilon, "n5");
-      assert_approx_equals(getBox("n6").width, 1, epsilon, "n6");
-      assert_approx_equals(getBox("n7").width, 8, epsilon, "n7");
-      assert_approx_equals(getBox("n8").width, 65, epsilon, "n8");
-      assert_approx_equals(getBox("n9").width, 432, epsilon, "n9");
-      assert_approx_equals(getBox("n10").width, 123, epsilon, "n10");
-    }, "Non-negative numbers");
-
-    test(function() {
-      var topRef = getBox("ref").top;
-      assert_approx_equals(getBox("N0").top - topRef, -0, epsilon, "N0");
-      assert_approx_equals(topRef - getBox("N1").top, -90, epsilon, "N1");
-      assert_approx_equals(topRef - getBox("N2").top, -8, epsilon, "N2");
-      assert_approx_equals(topRef - getBox("N3").top, -70, epsilon, "N3");
-      assert_approx_equals(topRef - getBox("N4").top, -650, epsilon, "N4");
-      assert_approx_equals(topRef - getBox("N5").top, -4320, epsilon, "N5");
-      assert_approx_equals(topRef - getBox("N6").top, -1, epsilon, "N6");
-      assert_approx_equals(topRef - getBox("N7").top, -8, epsilon, "N7");
-      assert_approx_equals(topRef - getBox("N8").top, -65, epsilon, "N8");
-      assert_approx_equals(topRef - getBox("N9").top, -432, epsilon, "N9");
-      assert_approx_equals(topRef - getBox("N10").top, -123, epsilon, "N10");
-    }, "Non-positive numbers");
-
-    done();
-  }
-</script>
-</head>
-<body>
-  <div id="log"></div>
-  <p>
-    <math>
-      <mspace id="unitCm" width="2.54cm"/>
-      <mspace id="unitEm" width="12em"/>
-      <mspace id="unitEx" width="100ex"/>
-      <mspace id="unitIn" width="3in"/>
-      <mspace style="font-size: 1800px" id="unitNamed" width="veryverythickmathspace"/>
-      <mspace id="unitMm" width="152.4mm"/>
-      <mspace id="unitPc" width="6pc"/>
-      <mstyle mathsize="200%"><mspace id="unitPercentage" width="3em"/></mstyle>
-      <mspace id="unitPt" width="72pt"/>
-      <mspace id="unitPx" width="123px"/>
-      <mstyle mathsize="5"><mspace id="unitNone" width="3em"/></mstyle>
-    </math>
-  </p>
-  <p>
-    <math>
-      <mspace id="spaceCm" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;2.54cm&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mspace id="spaceEm" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;12em&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mspace id="spaceEx" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;100ex&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mspace id="spaceIn" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;3in&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mspace style="font-size: 1800px" id="spaceNamed" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;veryverythickmathspace&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mspace id="spaceMm" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;152.4mm&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mspace id="spacePc" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;6pc&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mstyle mathsize="200%"><mspace id="spacePercentage" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;3em&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/></mstyle>
-      <mspace id="spacePt" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;72pt&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mspace id="spacePx" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;123px&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/>
-      <mstyle mathsize="5"><mspace id="spaceNone" width="&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;3em&#x20;&#x9;&#xA;&#xD;&#x20;&#x9;&#xA;&#xD;"/></mstyle>
-    </math>
-  </p>
-  <p>
-    <math>
-      <mspace id="n0" width="0em"/>
-      <mspace id="n1" width="9em"/>
-      <mspace id="n2" width=".8em"/>
-      <mspace id="n3" width="7.em"/>
-      <mspace id="n4" width="65em"/>
-      <mspace id="n5" width="432em"/>
-      <mspace id="n6" width=".10em"/>
-      <mspace id="n7" width=".789em"/>
-      <mspace id="n8" width="6.5em"/>
-      <mspace id="n9" width="43.21em"/>
-      <mspace id="n10" width="012.345em"/>
-    </math>
-  </p>
-  <p>
-    <math>
-      <mspace id="ref"></mspace>
-      <mpadded voffset="-0em"><mspace id="N0"/></mpadded>
-      <mpadded voffset="-9em"><mspace id="N1"/></mpadded>
-      <mpadded voffset="-.8em"><mspace id="N2"/></mpadded>
-      <mpadded voffset="-7.em"><mspace id="N3"/></mpadded>
-      <mpadded voffset="-65em"><mspace id="N4"/></mpadded>
-      <mpadded voffset="-432em"><mspace id="N5"/></mpadded>
-      <mpadded voffset="-.10em"><mspace id="N6"/></mpadded>
-      <mpadded voffset="-.789em"><mspace id="N7"/></mpadded>
-      <mpadded voffset="-6.5em"><mspace id="N8"/></mpadded>
-      <mpadded voffset="-43.21em"><mspace id="N9"/></mpadded>
-      <mpadded voffset="-012.345em"><mspace id="N10"/></mpadded>
-    </math>
-  </p>
-</body>
-</html>
diff --git a/tests/wpt/web-platform-tests/mediacapture-streams/MediaStream-MediaElement-firstframe.https.html b/tests/wpt/web-platform-tests/mediacapture-streams/MediaStream-MediaElement-firstframe.https.html
new file mode 100644
index 00000000000..1c629245886
--- /dev/null
+++ b/tests/wpt/web-platform-tests/mediacapture-streams/MediaStream-MediaElement-firstframe.https.html
@@ -0,0 +1,99 @@
+<!doctype html>
+<html>
+<head>
+<title>Assigning a MediaStream to a media element and not playing it results in rendering a first frame</title>
+</head>
+<body>
+<p class="instructions">When prompted, accept to share your video stream.</p>
+<h1 class="instructions">Description</h1>
+<p class="instructions">This test checks that a HTMLMediaElement with an
+assigned MediaStream with a video track fires the appropriate events to reach
+the "canplay" event and readyState HAVE_ENOUGH_DATA even when not playing or
+autoplaying.</p>
+<video id="vid"></video>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script>
+'use strict';
+const vid = document.getElementById("vid");
+
+promise_test(async t => {
+  const wait = ms => new Promise(r => t.step_timeout(r, ms));
+  const timeout = (promise, time, msg) => Promise.race([
+    promise,
+    wait(time).then(() => Promise.reject(new Error(msg)))
+  ]);
+  const stream = await navigator.mediaDevices.getUserMedia({video: true});
+  t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
+  vid.srcObject = stream;
+
+  await timeout(new Promise(r => vid.oncanplay = r), 8000, "canplay timeout");
+  assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA,
+    "readyState is HAVE_ENOUGH_DATA after \"canplay\"");
+}, "Tests that loading a MediaStream in a media element eventually results in \"canplay\" even when not playing or autoplaying");
+
+promise_test(async t => {
+  const wait = ms => new Promise(r => t.step_timeout(r, ms));
+  const timeout = (promise, time, msg) => Promise.race([
+    promise,
+    wait(time).then(() => Promise.reject(new Error(msg)))
+  ]);
+  const unexpected = e => { throw new Error(`Got unexpected event ${e.name}`); };
+  const stream = await navigator.mediaDevices.getUserMedia({video: true});
+  t.add_cleanup(() => stream.getTracks().forEach(track => track.stop()));
+  vid.srcObject = stream;
+
+  vid.onloadstart = unexpected;
+  vid.ondurationchange = unexpected;
+  vid.onresize = unexpected;
+  vid.onloadedmetadata = unexpected;
+  vid.onloadeddata = unexpected;
+  vid.oncanplay = unexpected;
+  vid.oncanplaythrough = unexpected;
+
+  await timeout(new Promise(r => vid.onloadstart = r), 8000,
+    "loadstart timeout");
+  vid.onloadstart = unexpected;
+
+  await timeout(new Promise(r => vid.ondurationchange = r), 8000,
+    "durationchange timeout");
+  vid.ondurationchange = unexpected;
+  assert_equals(vid.duration, Infinity, "duration changes to Infinity");
+
+  await timeout(new Promise(r => vid.onresize = r), 8000,
+    "resize timeout");
+  vid.onresize = unexpected;
+  assert_not_equals(vid.videoWidth, 0,
+    "videoWidth is something after \"resize\"");
+  assert_not_equals(vid.videoHeight, 0,
+    "videoHeight is something after \"resize\"");
+
+  await timeout(new Promise(r => vid.onloadedmetadata = r), 8000,
+    "loadedmetadata timeout");
+  vid.onloadedmetadata = unexpected;
+  assert_greater_than_equal(vid.readyState, vid.HAVE_METADATA,
+    "readyState is at least HAVE_METADATA after \"loadedmetadata\"");
+
+  await timeout(new Promise(r => vid.onloadeddata = r), 8000,
+    "loadeddata timeout");
+  vid.onloadeddata = unexpected;
+  assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA,
+    "readyState is HAVE_ENOUGH_DATA after \"loadeddata\" since there's no buffering");
+
+  await timeout(new Promise(r => vid.oncanplay = r), 8000, "canplay timeout");
+  vid.oncanplay = unexpected;
+  assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA,
+    "readyState is HAVE_ENOUGH_DATA after \"canplay\" since there's no buffering");
+
+  await timeout(new Promise(r => vid.oncanplaythrough = r), 8000,
+    "canplaythrough timeout");
+  vid.oncanplaythrough = unexpected;
+  assert_equals(vid.readyState, vid.HAVE_ENOUGH_DATA,
+    "readyState is HAVE_ENOUGH_DATA after \"canplaythrough\"");
+
+  // Crank the event loop to see whether any more events are fired.
+  await wait(100);
+}, "Tests that loading a MediaStream in a media element sees all the expected (deterministic) events even when not playing or autoplaying");
+</script>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/load_worker.js b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/load_worker.js
index 2c80f25a3db..ba15ffe32da 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/load_worker.js
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/load_worker.js
@@ -1,29 +1,19 @@
-self.onmessage = function (evt) {
-    if (evt.data == "xhr") {
-        var xhr = new XMLHttpRequest();
-        xhr.open("GET", "synthesized-response.txt", true);
-        xhr.responseType = "text";
-        xhr.send();
-        xhr.onload = function (evt) {
-            postMessage(xhr.responseText);
-        };
-        xhr.onerror = function() {
-            postMessage("XHR failed!");
-        };
-    } else if (evt.data == "fetch") {
-        fetch("synthesized-response.txt")
-          .then(function(response) {
-              return response.text();
-            })
-          .then(function(data) {
-              postMessage(data);
-            })
-          .catch(function(error) {
-              postMessage("Fetch failed!");
-            });
-    } else if (evt.data == "importScripts") {
-        importScripts("synthesized-response.js");
-    } else {
-        throw "Unexpected message! " + evt.data;
-    }
+self.onmessage = evt => {
+  if (evt.data == "xhr") {
+    const xhr = new XMLHttpRequest();
+    xhr.open("GET", "synthesized-response.txt", true);
+    xhr.responseType = "text";
+    xhr.send();
+    xhr.onload = evt => postMessage(xhr.responseText);
+    xhr.onerror = () => postMessage("XHR failed!");
+  } else if (evt.data == "fetch") {
+    fetch("synthesized-response.txt")
+        .then(response => response.text())
+        .then(data => postMessage(data))
+        .catch(error => postMessage("Fetch failed!"));
+  } else if (evt.data == "importScripts") {
+    importScripts("synthesized-response.js");
+  } else {
+    postMessage("Unexpected message! " + evt.data);
+  }
 };
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/worker-interception-iframe.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/worker-interception-iframe.https.html
index 84204a3ee5d..9dd5a185e7e 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/resources/worker-interception-iframe.https.html
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/resources/worker-interception-iframe.https.html
@@ -1,55 +1,51 @@
-<script src="/common/get-host-info.sub.js"></script>
 <script src="/resources/testharness.js"></script>
 <script src="test-helpers.sub.js?pipe=sub"></script>
 <script>
-var host_info = get_host_info();
 
-function boilerplate_test(url, msg) {
-    return new Promise(function(resolve, reject) {
-          var worker = new Worker(url);
-          worker.onmessage = function(e) { resolve(e.data) };
-          worker.onerror = function(e) { reject(e) };
-          worker.postMessage(msg);
-        })
-      .then(function(data) {
-          assert_equals(data, "This load was successfully intercepted.");
-        });
+async function boilerplate_test(url, msg) {
+  const worker = new Worker(url);
+  const data = await new Promise((resolve, reject) => {
+    worker.onmessage = e => resolve(e.data);
+    worker.onerror = e =>reject(e);
+    worker.postMessage(msg);
+  });
+  assert_equals(data, "This load was successfully intercepted.");
 }
 
 function xhr_test() {
-    return boilerplate_test("load_worker.js", "xhr");
+  return boilerplate_test("load_worker.js", "xhr");
 }
 
 function fetch_test() {
-    return boilerplate_test("load_worker.js", "fetch");
+  return boilerplate_test("load_worker.js", "fetch");
 }
 
 function importScripts_test() {
-    return boilerplate_test("load_worker.js", "importScripts");
+  return boilerplate_test("load_worker.js", "importScripts");
 }
 
 function nested_worker_xhr_test() {
-    return boilerplate_test("nested_load_worker.js", "xhr");
+  return boilerplate_test("nested_load_worker.js", "xhr");
 }
 
 function nested_worker_fetch_test() {
-    return boilerplate_test("nested_load_worker.js", "fetch");
+  return boilerplate_test("nested_load_worker.js", "fetch");
 }
 
 function nested_worker_importScripts_test() {
-    return boilerplate_test("nested_load_worker.js", "importScripts");
+  return boilerplate_test("nested_load_worker.js", "importScripts");
 }
 
-window.addEventListener('message', function(evt) {
-    var port = evt.ports[0];
-    xhr_test()
+window.addEventListener('message', evt => {
+  const port = evt.ports[0];
+  xhr_test()
       .then(fetch_test)
       .then(importScripts_test)
       .then(nested_worker_xhr_test)
       .then(nested_worker_fetch_test)
       .then(nested_worker_importScripts_test)
-      .then(function() { port.postMessage({results: 'finish'}); })
-      .catch(function(e) { port.postMessage({results: 'failure:' + e}); });
-  });
+      .then(() => port.postMessage({results: 'finish'}))
+      .catch(e => port.postMessage({results: 'failure:' + e}));
+});
 
 </script>
diff --git a/tests/wpt/web-platform-tests/service-workers/service-worker/worker-interception.https.html b/tests/wpt/web-platform-tests/service-workers/service-worker/worker-interception.https.html
index 7b2941263bf..1776376e96c 100644
--- a/tests/wpt/web-platform-tests/service-workers/service-worker/worker-interception.https.html
+++ b/tests/wpt/web-platform-tests/service-workers/service-worker/worker-interception.https.html
@@ -5,131 +5,81 @@
 <script src="resources/test-helpers.sub.js"></script>
 <body>
 <script>
-promise_test(function(t) {
-    var worker_url = 'resources/dummy-synthesized-worker.js';
-    var service_worker = 'resources/dummy-worker-interceptor.js';
-    var scope = worker_url;
 
-    return service_worker_unregister_and_register(t, service_worker, scope)
-      .then(function(r) {
-          t.add_cleanup(function() {
-              return service_worker_unregister(t, scope);
-            });
+async function setup_service_worker(t, script_url, scope) {
+  const r =
+      await service_worker_unregister_and_register(t, script_url, scope);
+  t.add_cleanup(() => service_worker_unregister(t, scope));
+  await wait_for_state(t, r.installing, 'activated');
+}
 
-          return wait_for_state(t, r.installing, 'activated');
-        })
-      .then(function() {
-          return new Promise(function(resolve, reject) {
-              var w = new Worker(worker_url);
-              w.onmessage = function(e) {
-                resolve(e.data);
-              }
+promise_test(async t => {
+  const worker_url = 'resources/dummy-synthesized-worker.js';
+  const service_worker = 'resources/dummy-worker-interceptor.js';
+  const scope = worker_url;
 
-              w.onerror = function(e) {
-                reject(e.message);
-              }
-            });
-        })
-      .then(function(data) {
-          assert_equals(data, 'worker loading intercepted by service worker');
-        });
-  }, 'Verify worker script from uncontrolled document is intercepted by Service Worker');
+  await setup_service_worker(t, service_worker, scope);
+  const w = new Worker(worker_url);
+  const data = await new Promise((resolve, reject) => {
+    w.onmessage = e => resolve(e.data);
+    w.onerror = e => reject(e.message);
+  });
+  assert_equals(data, 'worker loading intercepted by service worker');
+}, 'Verify worker script from uncontrolled document is intercepted by ' +
+   'Service Worker');
 
-promise_test(function(t) {
-    var worker_url = 'resources/dummy-same-origin-worker.js';
-    var service_worker = 'resources/dummy-worker-interceptor.js';
-    var scope = worker_url;
+promise_test(async t => {
+  const worker_url = 'resources/dummy-same-origin-worker.js';
+  const service_worker = 'resources/dummy-worker-interceptor.js';
+  const scope = worker_url;
 
-    return service_worker_unregister_and_register(t, service_worker, scope)
-      .then(function(r) {
-          t.add_cleanup(function() {
-              return service_worker_unregister(t, scope);
-            });
+  await setup_service_worker(t, service_worker, scope);
+  const w = new Worker(worker_url);
+  const data = await new Promise((resolve, reject) => {
+    w.onmessage = e => resolve(e.data);
+    w.onerror = e => reject(e.message);
+  });
+  assert_equals(data, 'dummy-worker-script loaded');
+}, 'Verify worker script intercepted by same-origin response succeeds');
 
-          return wait_for_state(t, r.installing, 'activated');
-        })
-      .then(function() {
-          return new Promise(function(resolve, reject) {
-              var w = new Worker(worker_url);
-              w.onmessage = function(e) {
-                resolve(e.data);
-              }
+promise_test(async t => {
+  const worker_url = 'resources/dummy-cors-worker.js';
+  const service_worker = 'resources/dummy-worker-interceptor.js';
+  const scope = worker_url;
 
-              w.onerror = function(e) {
-                reject(e.message);
-              }
-            });
-        })
-      .then(function(data) {
-          assert_equals(data, 'dummy-worker-script loaded');
-        });
-  }, 'Verify worker script intercepted by same-origin response succeeds');
+  await setup_service_worker(t, service_worker, scope);
+  const w = new Worker(worker_url);
+  const watcher = new EventWatcher(t, w, ['message', 'error']);
+  await watcher.wait_for('error');
+}, 'Verify worker script intercepted by cors response fails');
 
-promise_test(function(t) {
-    var worker_url = 'resources/dummy-cors-worker.js';
-    var service_worker = 'resources/dummy-worker-interceptor.js';
-    var scope = worker_url;
+promise_test(async t => {
+  const worker_url = 'resources/dummy-no-cors-worker.js';
+  const service_worker = 'resources/dummy-worker-interceptor.js';
+  const scope = worker_url;
 
-    return service_worker_unregister_and_register(t, service_worker, scope)
-      .then(function(r) {
-          return wait_for_state(t, r.installing, 'activated');
-        })
-      .then(function() {
-          var w = new Worker(worker_url);
-          var watcher = new EventWatcher(t, w, ['message', 'error']);
-          return watcher.wait_for('error');
-        });
-  }, 'Verify worker script intercepted by cors response fails');
+  await setup_service_worker(t, service_worker, scope);
+  const w = new Worker(worker_url);
+  const watcher = new EventWatcher(t, w, ['message', 'error']);
+  await watcher.wait_for('error');
+}, 'Verify worker script intercepted by no-cors cross-origin response fails');
 
-promise_test(function(t) {
-    var worker_url = 'resources/dummy-no-cors-worker.js';
-    var service_worker = 'resources/dummy-worker-interceptor.js';
-    var scope = worker_url;
+promise_test(async t => {
+  const subdoc_url = 'resources/worker-interception-iframe.https.html?bypass';
+  const service_worker = 'resources/worker-load-interceptor.js';
+  const scope = 'resources/';
 
-    return service_worker_unregister_and_register(t, service_worker, scope)
-      .then(function(r) {
-          t.add_cleanup(function() {
-              return service_worker_unregister(t, scope);
-            });
-
-          return wait_for_state(t, r.installing, 'activated');
-        })
-      .then(function() {
-          var w = new Worker(worker_url);
-          var watcher = new EventWatcher(t, w, ['message', 'error']);
-          return watcher.wait_for('error');
-        });
-  }, 'Verify worker script intercepted by no-cors cross-origin response fails');
-
-promise_test(function(t) {
-    var subdoc_url = 'resources/worker-interception-iframe.https.html?bypass';
-    var service_worker = 'resources/worker-load-interceptor.js';
-    var scope = 'resources/';
-
-    return service_worker_unregister_and_register(t, service_worker, scope)
-      .then(function(r) {
-          t.add_cleanup(function() {
-              return service_worker_unregister(t, scope);
-            });
-
-          return wait_for_state(t, r.installing, 'activated');
-        })
-      .then(function() { return with_iframe(subdoc_url); })
-      .then(function(frame) {
-          return new Promise(function(resolve, reject) {
-              var channel = new MessageChannel();
-              channel.port1.onmessage = function(e) {
-                frame.remove();
-                resolve(e.data);
-              }
-
-              frame.contentWindow.postMessage("GO", "*", [channel.port2]);
-            });
-        })
-      .then(function(data) {
-          assert_equals(data.results, 'finish');
-        });
-  }, 'Verify worker loads from controlled document are intercepted by Service Worker');
+  await setup_service_worker(t, service_worker, scope);
+  const frame = await with_iframe(subdoc_url);
+  t.add_cleanup(() => frame.remove());
+  const data = await new Promise((resolve, reject) => {
+    const channel = new MessageChannel();
+    channel.port1.onmessage = e => resolve(e.data);
+    frame.contentWindow.postMessage("GO", "*", [channel.port2]);
+  });
+  assert_equals(data.results, 'finish');
+}, 'Verify worker loads from controlled document are intercepted by Service ' +
+   'Worker');
 
 </script>
 </body>
diff --git a/tests/wpt/web-platform-tests/svg/text/reftests/text-xml-space-001-ref.svg b/tests/wpt/web-platform-tests/svg/text/reftests/text-xml-space-001-ref.svg
new file mode 100644
index 00000000000..1572149cf68
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/text/reftests/text-xml-space-001-ref.svg
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:h="http://www.w3.org/1999/xhtml">
+  <title>SVG Reference</title>
+  <text x="50" y="50" font-family="monospace">Some&#160;&#160;Text</text>
+</svg>
diff --git a/tests/wpt/web-platform-tests/svg/text/reftests/text-xml-space-001.svg b/tests/wpt/web-platform-tests/svg/text/reftests/text-xml-space-001.svg
new file mode 100644
index 00000000000..c58bd9d4e57
--- /dev/null
+++ b/tests/wpt/web-platform-tests/svg/text/reftests/text-xml-space-001.svg
@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:h="http://www.w3.org/1999/xhtml">
+  <title>SVG Test: Behavior of xml:space="preserve"</title>
+  <h:link rel="help" href="https://svgwg.org/svg2-draft/styling.html#UAStyleSheet"/>
+  <h:link rel="match" href="text-xml-space-001-ref.svg"/>
+  <g xml:space="preserve">
+    <text x="50" y="50" font-family="monospace">Some  Text</text>
+  </g>
+</svg>
diff --git a/tests/wpt/web-platform-tests/timing-entrytypes-registry/META.yml b/tests/wpt/web-platform-tests/timing-entrytypes-registry/META.yml
new file mode 100644
index 00000000000..c09a6e03fd1
--- /dev/null
+++ b/tests/wpt/web-platform-tests/timing-entrytypes-registry/META.yml
@@ -0,0 +1,6 @@
+spec: https://w3c.github.io/navigation-timing/
+suggested_reviewers:
+  - plehegar
+  - igrigorik
+  - toddreifsteck
+  - yoavweiss
diff --git a/tests/wpt/web-platform-tests/timing-entrytypes-registry/registry.any.js b/tests/wpt/web-platform-tests/timing-entrytypes-registry/registry.any.js
new file mode 100644
index 00000000000..4db249b16be
--- /dev/null
+++ b/tests/wpt/web-platform-tests/timing-entrytypes-registry/registry.any.js
@@ -0,0 +1,25 @@
+// META: script=resources/utils.js
+
+test(() => {
+  assert_true(!!self.PerformanceObserver, "PerformanceObserver");
+  assert_true(!!self.PerformanceObserver.supportedEntryTypes,
+              "PerformanceObserver.supportedEntryTypes");
+}, "PerformanceObserver.supportedEntryTypes exists");
+
+// UPDATE HERE if new entry
+[
+  [ "mark", "PerformanceMark" ],
+  [ "measure", "PerformanceMeasure" ],
+  [ "resource", "PerformanceResourceTiming" ],
+].forEach(test_support);
+
+// UPDATE BELOW to ensure the entry gets created
+
+// mark
+self.performance.mark('mymark');
+
+// measure
+self.performance.measure('mymeasure');
+
+// resource
+fetch(self.location.href + "?" + Math.random());
diff --git a/tests/wpt/web-platform-tests/timing-entrytypes-registry/registry.window.js b/tests/wpt/web-platform-tests/timing-entrytypes-registry/registry.window.js
new file mode 100644
index 00000000000..21ef2230e9e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/timing-entrytypes-registry/registry.window.js
@@ -0,0 +1,33 @@
+// META: script=resources/utils.js
+
+test(() => {
+  assert_true(!!self.PerformanceObserver, "PerformanceObserver");
+  assert_true(!!self.PerformanceObserver.supportedEntryTypes,
+              "PerformanceObserver.supportedEntryTypes");
+}, "PerformanceObserver.supportedEntryTypes exists");
+
+// UPDATE HERE if new entry
+[
+  [ "navigation", "PerformanceNavigationTiming" ],
+  [ "paint", "PerformancePaintTiming" ],
+  [ "longtask", "PerformanceLongTaskTiming" ],
+].forEach(test_support);
+
+// UPDATE BELOW to ensure the entry gets created
+
+// paint
+if (self.document) document.head.parentNode.appendChild(document.createTextNode('text inserted on purpose'));
+
+// longtask
+function syncWait(waitDuration) {
+  if (waitDuration <= 0)
+    return;
+
+  const startTime = performance.now();
+  let unused = '';
+  for (let i = 0; i < 10000; i++)
+    unused += '' + Math.random();
+
+  return syncWait(waitDuration - (performance.now() - startTime));
+}
+syncWait(50);
diff --git a/tests/wpt/web-platform-tests/timing-entrytypes-registry/resources/utils.js b/tests/wpt/web-platform-tests/timing-entrytypes-registry/resources/utils.js
new file mode 100644
index 00000000000..0ec96057ad8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/timing-entrytypes-registry/resources/utils.js
@@ -0,0 +1,29 @@
+const STEPS = {};
+
+const types = (self.PerformanceObserver
+                  && self.PerformanceObserver.supportedEntryTypes)?
+    self.PerformanceObserver.supportedEntryTypes
+    : undefined;
+
+if (types) {
+  // we observe everything as soon as possible
+  new PerformanceObserver(function (list, observer) {
+    for (const entry of list.getEntries())
+      if (STEPS[entry.entryType]) STEPS[entry.entryType](entry);
+  }).observe({entryTypes: self.PerformanceObserver.supportedEntryTypes});
+}
+
+function test_support(def) {
+  if (!types || !types.includes(def[0])) {
+    return;
+  }
+  const desc = `'${def[0]}' entries should be observable`;
+  const t = async_test(desc);
+
+  STEPS[def[0]] = (entry) => {
+    t.step(() => assert_equals(Object.prototype.toString.call(entry),
+    `[object ${def[1]}]`,
+    `Class name of entry should be ${def[1]}.`));
+    t.done();
+  }
+}
diff --git a/tests/wpt/web-platform-tests/user-timing/measure-with-dict.html b/tests/wpt/web-platform-tests/user-timing/measure-with-dict.html
index e5869e1df84..1c46709765b 100644
--- a/tests/wpt/web-platform-tests/user-timing/measure-with-dict.html
+++ b/tests/wpt/web-platform-tests/user-timing/measure-with-dict.html
@@ -5,7 +5,13 @@
 <script src="/resources/testharnessreport.js"></script>
 <script src="resources/user-timing-helper.js"></script>
 <script>
+  function cleanupPerformanceTimeline() {
+    performance.clearMarks();
+    performance.clearMeasures();
+  }
+
   async_test(function (t) {
+    this.add_cleanup(cleanupPerformanceTimeline);
     let measureEntries = [];
     const timeStamp1 = 784.4;
     const timeStamp2 = 1234.5;
@@ -40,8 +46,6 @@
           }
         })
       );
-    self.performance.clearMarks();
-    self.performance.clearMeasures();
     observer.observe({ entryTypes: ["measure"] });
     self.performance.mark("mark1", { detail: { randomInfo: 3 }, startTime: timeStamp1 });
     self.performance.mark("mark2", { startTime: timeStamp2 });
@@ -80,10 +84,16 @@
     checkEntries(returnedEntries, expectedEntries);
   }, "measure entries' detail and start/end are customizable");
 
-  async_test(function (t) {
-    assert_throws("SyntaxError", function() {
+  test(function () {
+    this.add_cleanup(cleanupPerformanceTimeline);
+    assert_throws(new TypeError(), function() {
       self.performance.measure("wrongUsage1", {}, 12);
-    });
-    t.done();
-  }, "measure should throw exception when passing option object and end at the same time");
+    }, "measure should throw a TypeError when passed an options object and an end time");
+    assert_throws(new TypeError(), function() {
+      self.performance.measure("wrongUsage2", {'startTime': 2}, 12);
+    }, "measure should throw a TypeError when passed an options object and an end time");
+    assert_throws(new TypeError(), function() {
+      self.performance.measure("wrongUsage3", {'startTime': 2}, 'mark1');
+    }, "measure should throw a TypeError when passed an options object and an end mark");
+  }, "measure should throw a TypeError when passed an invalid argument combination");
 </script>
diff --git a/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-channelmergernode-interface/active-processing.https.html b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-channelmergernode-interface/active-processing.https.html
new file mode 100644
index 00000000000..24932921e9b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webaudio/the-audio-api/the-channelmergernode-interface/active-processing.https.html
@@ -0,0 +1,108 @@
+<!doctype html>
+<html>
+  <head>
+    <title>
+      Test Active Processing for ChannelMergerNode
+    </title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+    <script src="/webaudio/resources/audit-util.js"></script>
+    <script src="/webaudio/resources/audit.js"></script>
+  </head>
+
+  <body>
+    <script id="layout-test-code">
+      let audit = Audit.createTaskRunner();
+
+      // The sample rate MUST be a power of two to eliminate round-off when
+      // computing render boundaries but is otherwise arbitrary. And we only new
+      // a few blocks for rendering to see if things are working.
+      let sampleRate = 8192;
+      let renderLength = 10 * RENDER_QUANTUM_FRAMES;
+
+      // Number of inputs for the ChannelMergerNode.  Pretty arbitrary, but
+      // should not be 1.
+      let numberOfInputs = 7;
+
+      // How many frames the source should run.  Arbitrary but should be more
+      // than a render quantum.
+      let sourceDurationFrames = 131;
+
+      // Frame at which to connect the source to the merger
+      let connectFrame = 2 * RENDER_QUANTUM_FRAMES;
+
+      // AudioProcessor that counts the number of channels on its single input.
+      let filePath =
+          '../the-audioworklet-interface/processors/input-count-processor.js';
+
+      audit.define(
+          {
+            label: 'Test',
+            description: 'Active processing for ChannelMergerNode'
+          },
+          async (task, should) => {
+            const context = new OfflineAudioContext({
+              numberOfChannels: numberOfInputs,
+              length: renderLength,
+              sampleRate: sampleRate
+            });
+
+            // Don't mix the inputs to the destination!
+            context.destination.channelInterpretation = 'discrete';
+
+            await context.audioWorklet.addModule(filePath);
+
+            let src = new ConstantSourceNode(context);
+            let merger = new ChannelMergerNode(
+                context, {numberOfInputs: numberOfInputs});
+            let counter = new AudioWorkletNode(context, 'counter');
+
+            // Just to print a message that we created the graph with a
+            // convolver in it.
+            should(
+                () => {
+                  merger.connect(counter).connect(context.destination);
+                },
+                `Construction of graph with ChannelMergerNode with ${
+                    merger.numberOfInputs} inputs`)
+                .notThrow()
+
+            // Connect the source now and start it and let it run for
+            // |sourceDurationFrames| frames.
+            context.suspend(connectFrame / context.sampleRate)
+                .then(() => {
+                  src.connect(merger, 0, 0);
+                  src.start();
+                  src.stop(
+                      context.currentTime +
+                      sourceDurationFrames / context.sampleRate);
+                })
+                .then(() => context.resume());
+
+            const renderedBuffer = await context.startRendering();
+            // The expected output is something like:
+            //
+            //   1, 1, 1,..., 7, 7, 7.,,,, 1, 1, 1
+            //
+            // When the merger has no inputs, it's not actively processing
+            // so it must output mono silence.  After connecting a source,
+            // the number of channels of the output should be the same as
+            // the number of inputs to the merger.  Finally, when the
+            // source stops, the merger is not actively processing anymore
+            // and should output mono silence again.  For this test, we
+            // don't care too much how many different values there are.
+            // There just has to be at least one of each value, in the
+            // order given.
+            const output = renderedBuffer.getChannelData(0);
+
+            should(output, 'Number of output channels').containValues([
+              1, numberOfInputs, 1
+            ]);
+
+            task.done();
+          });
+
+      audit.run();
+    </script>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures.py b/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures.py
index bd2381d2069..9f8c983d498 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/fixtures.py
@@ -168,9 +168,10 @@ def current_session():
 
 @pytest.fixture
 def url(server_config):
-    def inner(path, protocol="http", query="", fragment=""):
+    def inner(path, protocol="http", subdomain="", query="", fragment=""):
+        domain = server_config["domains"][""][subdomain]
         port = server_config["ports"][protocol][0]
-        host = "%s:%s" % (server_config["browser_host"], port)
+        host = "%s:%s" % (domain, port)
         return urlparse.urlunsplit((protocol, host, path, query, fragment))
 
     inner.__name__ = "url"
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 c955135f814..8bc53e7b403 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/helpers.py
@@ -142,6 +142,15 @@ def document_hidden(session):
     return Poll(session, timeout=3, raises=None).until(hidden)
 
 
+def document_location(session):
+    """
+    Unlike ``webdriver.Session#url``, which always returns
+    the top-level browsing context's URL, this returns
+    the current browsing context's active document's URL.
+    """
+    return session.execute_script("return document.location.href")
+
+
 def element_rect(session, element):
     return session.execute_script("""
         let element = arguments[0];
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/support/inline.py b/tests/wpt/web-platform-tests/webdriver/tests/support/inline.py
index 8b4f1657cff..639699809c1 100644
--- a/tests/wpt/web-platform-tests/webdriver/tests/support/inline.py
+++ b/tests/wpt/web-platform-tests/webdriver/tests/support/inline.py
@@ -1,7 +1,10 @@
 import urllib
 
 
-def inline(doc, doctype="html", mime="text/html;charset=utf-8", protocol="http"):
+def inline(doc,
+           doctype="html",
+           mime="text/html;charset=utf-8",
+           **kwargs):
     from .fixtures import server_config, url
     build_url = url(server_config())
 
@@ -30,11 +33,11 @@ def inline(doc, doctype="html", mime="text/html;charset=utf-8", protocol="http")
 
     return build_url("/webdriver/tests/support/inline.py",
                      query=urllib.urlencode(query),
-                     protocol=protocol)
+                     **kwargs)
 
 
-def iframe(doc):
-    return "<iframe src='%s'></iframe>" % inline(doc)
+def iframe(doc, **kwargs):
+    return "<iframe src='%s'></iframe>" % inline(doc, **kwargs)
 
 
 def main(request, response):
diff --git a/tests/wpt/web-platform-tests/webdriver/tests/switch_to_frame/cross_origin.py b/tests/wpt/web-platform-tests/webdriver/tests/switch_to_frame/cross_origin.py
new file mode 100644
index 00000000000..3e5bab191a8
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webdriver/tests/switch_to_frame/cross_origin.py
@@ -0,0 +1,60 @@
+import webdriver.protocol as protocol
+
+from tests.support.asserts import assert_success
+from tests.support.helpers import document_location
+from tests.support.inline import (
+    iframe,
+    inline,
+)
+
+
+"""
+Tests that WebDriver can transcend site origins.
+
+Many modern browsers impose strict cross-origin checks,
+and WebDriver should be able to transcend these.
+
+Although an implementation detail, certain browsers
+also enforce process isolation based on site origin.
+This is known to sometimes cause problems for WebDriver implementations.
+"""
+
+
+def switch_to_frame(session, frame):
+    return session.transport.send(
+        "POST", "/session/{session_id}/frame".format(**vars(session)),
+        {"id": frame},
+        encoder=protocol.Encoder, decoder=protocol.Decoder,
+        session=session)
+
+
+def test_cross_origin_iframe(session, server_config):
+    session.url = inline(iframe("", subdomain="www"))
+    frame_element = session.find.css("iframe", all=False)
+
+    response = switch_to_frame(session, frame_element)
+    value = assert_success(response)
+    assert document_location(session).startswith(
+        "http://www.{}".format(server_config["browser_host"]))
+
+
+def test_nested_cross_origin_iframe(session, server_config):
+    frame2 = iframe("", subdomain="www.www")
+    frame1 = iframe(frame2, subdomain="www")
+    top_doc = inline(frame1, subdomain="")
+
+    session.url = top_doc
+    assert document_location(session).startswith(
+        "http://{}".format(server_config["browser_host"]))
+
+    frame1_el = session.find.css("iframe", all=False)
+    response = switch_to_frame(session, frame1_el)
+    value = assert_success(response)
+    assert document_location(session).startswith(
+        "http://www.{}".format(server_config["browser_host"]))
+
+    frame2_el = session.find.css("iframe", all=False)
+    response = switch_to_frame(session, frame2_el)
+    value = assert_success(response)
+    assert document_location(session).startswith(
+        "http://www.www.{}".format(server_config["browser_host"]))
diff --git a/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-mandatory-getStats.https.html b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-mandatory-getStats.https.html
new file mode 100644
index 00000000000..fd8c74b9184
--- /dev/null
+++ b/tests/wpt/web-platform-tests/webrtc/RTCPeerConnection-mandatory-getStats.https.html
@@ -0,0 +1,266 @@
+<!doctype html>
+<meta charset=utf-8>
+<meta name="timeout" content="long">
+<title>Mandatory-to-implement stats compliance (a subset of webrtc-stats)</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src="RTCPeerConnection-helper.js"></script>
+<script src="dictionary-helper.js"></script>
+<script src="RTCStats-helper.js"></script>
+<script>
+'use strict';
+
+// From https://w3c.github.io/webrtc-pc/#mandatory-to-implement-stats
+
+const mandatory = {
+  RTCRtpStreamStats: [
+    "ssrc",
+    "kind",
+    "transportId",
+    "codecId",
+  ],
+  RTCReceivedRtpStreamStats: [
+    "packetsReceived",
+    "packetsLost",
+    "jitter",
+    "packetsDiscarded",
+  ],
+  RTCInboundRtpStreamStats: [
+    "trackId",
+    "receiverId",
+    "remoteId",
+    "framesDecoded",
+  ],
+  RTCRemoteInboundRtpStreamStats: [
+    "localId",
+    "roundTripTime",
+  ],
+  RTCSentRtpStreamStats: [
+    "packetsSent",
+    "bytesSent"
+  ],
+  RTCOutboundRtpStreamStats: [
+    "trackId",
+    "senderId",
+    "remoteId",
+    "framesEncoded",
+  ],
+  RTCRemoteOutboundRtpStreamStats: [
+    "localId",
+    "remoteTimestamp",
+  ],
+  RTCPeerConnectionStats: [
+    "dataChannelsOpened",
+    "dataChannelsClosed",
+  ],
+  RTCDataChannelStats: [
+    "protocol",
+    "dataChannelIdentifier",
+    "state",
+    "messagesSent",
+    "bytesSent",
+    "messagesReceived",
+    "bytesReceived",
+  ],
+  RTCMediaStreamStats: [
+    "streamIdentifer",
+    "trackIds",
+  ],
+  RTCMediaHandlerStats: [
+    "trackIdentifier",
+    "remoteSource",
+    "ended",
+  ],
+  RTCAudioHandlerStats: [
+    "audioLevel",
+  ],
+  RTCVideoHandlerStats: [
+    "frameWidth",
+    "frameHeight",
+    "framesPerSecond",
+  ],
+  RTCVideoSenderStats: [
+    "framesSent",
+  ],
+  RTCVideoReceiverStats: [
+    "framesReceived",
+    "framesDecoded",
+    "framesDropped",
+    "partialFramesLost",
+  ],
+  RTCCodecStats: [
+    "payloadType",
+    "codecType",
+    "clockRate",
+    "channels",
+    "sdpFmtpLine",
+  ],
+  RTCTransportStats: [
+    "bytesSent",
+    "bytesReceived",
+    "rtcpTransportStatsId",
+    "selectedCandidatePairId",
+    "localCertificateId",
+    "remoteCertificateId",
+  ],
+  RTCIceCandidatePairStats: [
+    "transportId",
+    "localCandidateId",
+    "remoteCandidateId",
+    "state",
+    "priority",
+    "nominated",
+    "bytesSent",
+    "bytesReceived",
+    "totalRoundTripTime",
+    "currentRoundTripTime",
+  ],
+  RTCIceCandidateStats: [
+    "address",
+    "port",
+    "protocol",
+    "candidateType",
+    "url",
+  ],
+  RTCCertificateStats: [
+    "fingerprint",
+    "fingerprintAlgorithm",
+    "base64Certificate",
+    "issuerCertificateId",
+  ],
+};
+
+// From https://w3c.github.io/webrtc-stats/webrtc-stats.html#rtcstatstype-str*
+
+const dictionaryNames = {
+  "codec": "RTCCodecStats",
+  "inbound-rtp": "RTCInboundRtpStreamStats",
+  "outbound-rtp": "RTCOutboundRtpStreamStats",
+  "remote-inbound-rtp": "RTCRemoteInboundRtpStreamStats",
+  "remote-outbound-rtp": "RTCRemoteOutboundRtpStreamStats",
+  "csrc": "RTCRtpContributingSourceStats",
+  "peer-connection": "RTCPeerConnectionStats",
+  "data-channel": "RTCDataChannelStats",
+  "stream": "RTCMediaStreamStats",
+  "track": {
+    video: "RTCSenderVideoTrackAttachmentStats",
+    audio: "RTCSenderAudioTrackAttachmentStats"
+  },
+  "sender": {
+    audio: "RTCAudioSenderStats",
+    video: "RTCVideoSenderStats"
+  },
+  "receiver": {
+    audio: "RTCAudioReceiverStats",
+    video: "RTCVideoReceiverStats",
+  },
+  "transport": "RTCTransportStats",
+  "candidate-pair": "RTCIceCandidatePairStats",
+  "local-candidate": "RTCIceCandidateStats",
+  "remote-candidate": "RTCIceCandidateStats",
+  "certificate": "RTCCertificateStats",
+};
+
+// From https://w3c.github.io/webrtc-stats/webrtc-stats.html (webidl)
+
+const parents = {
+  RTCVideoHandlerStats: "RTCMediaHandlerStats",
+  RTCVideoSenderStats: "RTCVideoHandlerStats",
+  RTCSenderVideoTrackAttachmentStats: "RTCVideoSenderStats",
+  RTCVideoReceiverStats: "RTCVideoHandlerStats",
+  RTCAudioHandlerStats: "RTCMediaHandlerStats",
+  RTCAudioSenderStats: "RTCAudioHandlerStats",
+  RTCSenderAudioTrackAttachmentStats: "RTCAudioSenderStats",
+  RTCAudioReceiverStats: "RTCAudioHandlerStats",
+  RTCReceivedRtpStreamStats: "RTCRtpStreamStats",
+  RTCInboundRtpStreamStats: "RTCReceivedRtpStreamStats",
+  RTCRemoteInboundRtpStreamStats: "RTCReceivedRtpStreamStats",
+  RTCSentRtpStreamStats: "RTCRtpStreamStats",
+  RTCOutboundRtpStreamStats: "RTCSentRtpStreamStats",
+  RTCRemoteOutboundRtpStreamStats : "RTCSentRtpStreamStats",
+};
+
+const remaining = JSON.parse(JSON.stringify(mandatory));
+for (const dictName in remaining) {
+  remaining[dictName] = new Set(remaining[dictName]);
+}
+
+async function getAllStats(t, pc) {
+  // Try to obtain as many stats as possible, waiting up to 20 seconds for
+  // roundTripTime which can take several RTCP messages to calculate.
+  let stats;
+  for (let i = 0; i < 20; i++) {
+    stats = await pc.getStats();
+    const values = [...stats.values()];
+    const [audio, video] = ["audio", "video"].map(kind =>
+      values.find(s => s.type == "remote-inbound-rtp" && s.kind == kind));
+    if (audio && "roundTripTime" in audio &&
+        video && "roundTripTime" in video) {
+      return stats;
+    }
+    await new Promise(r => t.step_timeout(r, 1000));
+  }
+  return stats;
+}
+
+let succeed;
+const success = new Promise(r => succeed = r);
+
+promise_test(async t => {
+  const pc1 = new RTCPeerConnection();
+  t.add_cleanup(() => pc1.close());
+  const pc2 = new RTCPeerConnection();
+  t.add_cleanup(() => pc2.close());
+
+  pc1.createDataChannel("dummy", {negotiated: true, id: 0});
+  pc2.createDataChannel("dummy", {negotiated: true, id: 0});
+  const stream = await getNoiseStream({video: true, audio:true});
+  for (const track of stream.getTracks()) {
+    pc1.addTrack(track, stream);
+    pc2.addTrack(track, stream);
+    t.add_cleanup(() => track.stop());
+  }
+  exchangeIceCandidates(pc1, pc2);
+  await doSignalingHandshake(pc1, pc2);
+  const stats = await getAllStats(t, pc1);
+
+  // The focus of this test is not API correctness, but rather to provide an
+  // accessible metric of implementation progress by dictionary member. We count
+  // whether we've seen each dictionary's mandatory members in getStats().
+
+  for (const stat of stats.values()) {
+    let dictName = dictionaryNames[stat.type];
+    if (!dictName) continue;
+    if (typeof dictName == "object") {
+      dictName = dictName[stat.kind];
+    }
+    assert_equals(typeof dictName, "string", "Test error. String.");
+    if (dictName && mandatory[dictName]) {
+      do {
+        const memberNames = mandatory[dictName];
+        const remainingNames = remaining[dictName];
+        assert_true(memberNames.length > 0, "Test error. Parent not found.");
+        for (const memberName of memberNames) {
+          if (memberName in stat) {
+            assert_not_equals(stat[memberName], undefined, "Not undefined");
+            remainingNames.delete(memberName);
+          }
+        }
+        dictName = parents[dictName];
+      } while (dictName);
+    }
+  }
+  succeed();
+}, 'getStats succeeds');
+
+for (const dictName in mandatory) {
+  for (const memberName of mandatory[dictName]) {
+    promise_test(async t => {
+      await success;
+      assert_true(!remaining[dictName].has(memberName),
+                  `Is ${memberName} present`);
+    }, `${dictName}'s ${memberName}`);
+  }
+}
+
+</script>
diff --git a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/basic-ref.html b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/basic-ref.html
index 89d7f35ef1f..182bc69277b 100644
--- a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/basic-ref.html
+++ b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/basic-ref.html
@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <title>Reference for WebVTT rendering, basic</title>
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 html { overflow:hidden }
 body { margin:0 }
diff --git a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/basic.html b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/basic.html
index 983600bdf18..ca77eb734bf 100644
--- a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/basic.html
+++ b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/basic.html
@@ -2,6 +2,7 @@
 <html class="reftest-wait">
 <title>WebVTT rendering, basic</title>
 <link rel="match" href="basic-ref.html">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 html { overflow:hidden }
 body { margin:0 }
diff --git a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/line_0_is_top-ref.html b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/line_0_is_top-ref.html
index 7edb8876e0e..85f2a95fa8a 100644
--- a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/line_0_is_top-ref.html
+++ b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/line_0_is_top-ref.html
@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <title>Reference for WebVTT rendering, line:0 should be top line</title>
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 html { overflow:hidden }
 body { margin:0 }
diff --git a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/line_0_is_top.html b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/line_0_is_top.html
index 2167f218f36..c780a223e73 100644
--- a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/line_0_is_top.html
+++ b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/line_0_is_top.html
@@ -2,6 +2,7 @@
 <html class="reftest-wait">
 <title>WebVTT rendering, line:0 should be top line</title>
 <link rel="match" href="line_0_is_top-ref.html">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 html { overflow:hidden }
 body { margin:0 }
diff --git a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace-ref.html b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace-ref.html
index 3aea69adc46..13705162368 100644
--- a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace-ref.html
+++ b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace-ref.html
@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <title>Reference for WebVTT rendering, ::cue(|c) should match</title>
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 html { overflow:hidden }
 body { margin:0 }
diff --git a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace.html b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace.html
index 777ce661c2e..3989f2180a0 100644
--- a/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace.html
+++ b/tests/wpt/web-platform-tests/webvtt/rendering/cues-with-video/processing-model/selectors/cue_function/class_object/class_namespace.html
@@ -2,6 +2,7 @@
 <html class="reftest-wait">
 <title>WebVTT rendering, ::cue(|c) should match</title>
 <link rel="match" href="class_namespace-ref.html">
+<link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
 <style>
 html { overflow:hidden }
 body { margin:0 }