diff --git a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
index a9e46713244..76b398963ae 100644
--- a/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
+++ b/tests/wpt/metadata/FileAPI/url/url-in-tags-revoke.window.js.ini
@@ -7,7 +7,7 @@
     expected: FAIL
 
   [Opening a blob URL in a new window immediately before revoking it works.]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Opening a blob URL in a noopener about:blank window immediately before revoking it works.]
     expected: FAIL
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 3bf07accd5a..85c96a326f6 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -206661,6 +206661,30 @@
      {}
     ]
    ],
+   "quirks/percentage-height-quirk-excludes-flex-grid-001.html": [
+    [
+     "quirks/percentage-height-quirk-excludes-flex-grid-001.html",
+     [
+      [
+       "/quirks/reference/percentage-height-quirk-excludes-flex-grid-001-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
+   "quirks/percentage-height-quirk-excludes-flex-grid-002.html": [
+    [
+     "quirks/percentage-height-quirk-excludes-flex-grid-002.html",
+     [
+      [
+       "/quirks/reference/percentage-height-quirk-excludes-flex-grid-002-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "quirks/table-cell-width-calculation-abspos.html": [
     [
      "quirks/table-cell-width-calculation-abspos.html",
@@ -212784,6 +212808,18 @@
      ],
      {}
     ]
+   ],
+   "quirks/reference/percentage-height-quirk-excludes-flex-grid-002-ref.html": [
+    [
+     "quirks/reference/percentage-height-quirk-excludes-flex-grid-002-ref.html",
+     [
+      [
+       "/quirks/reference/percentage-height-quirk-excludes-flex-grid-002-notref.html",
+       "!="
+      ]
+     ],
+     {}
+    ]
    ]
   },
   "support": {
@@ -279057,6 +279093,12 @@
    "quirks/reference/green-100px-square-no-red.html": [
     []
    ],
+   "quirks/reference/percentage-height-quirk-excludes-flex-grid-001-ref.html": [
+    []
+   ],
+   "quirks/reference/percentage-height-quirk-excludes-flex-grid-002-notref.html": [
+    []
+   ],
    "quirks/reference/table-cell-width-calculation-abspos-ref.html": [
     []
    ],
@@ -657627,7 +657669,7 @@
    "support"
   ],
   "html/semantics/forms/form-submission-0/form-submission-algorithm.html": [
-   "df39b57353c67ebb02014865f28d739bbf24c690",
+   "2d5ac276374370dd594d3d8f98c1b85e8186eb26",
    "testharness"
   ],
   "html/semantics/forms/form-submission-0/getactionurl.html": [
@@ -680954,10 +680996,30 @@
    "e56a03b4b41b72edca91ff261e766fc9d2cc5426",
    "testharness"
   ],
+  "quirks/percentage-height-quirk-excludes-flex-grid-001.html": [
+   "cb0f772b1fa2fed26992f288cc345e7ab418d919",
+   "reftest"
+  ],
+  "quirks/percentage-height-quirk-excludes-flex-grid-002.html": [
+   "88df89d0932e8f347ffad8faa4e5da9dc2e71b56",
+   "reftest"
+  ],
   "quirks/reference/green-100px-square-no-red.html": [
    "159d9a52a01a0b328680a530603cb496ab2d5fcf",
    "support"
   ],
+  "quirks/reference/percentage-height-quirk-excludes-flex-grid-001-ref.html": [
+   "29f8e26a67f27e9ae250e464c05a8f3af1e0b9a5",
+   "support"
+  ],
+  "quirks/reference/percentage-height-quirk-excludes-flex-grid-002-notref.html": [
+   "19aa243a0045f4378b55a00dd3b2431fc9a9ec23",
+   "support"
+  ],
+  "quirks/reference/percentage-height-quirk-excludes-flex-grid-002-ref.html": [
+   "c63bc0efa85f59eb496875072970016cf77d3c9d",
+   "reftest_node"
+  ],
   "quirks/reference/table-cell-width-calculation-abspos-ref.html": [
    "41d2203b4a08323a2d6b9894f1ad133e35130265",
    "support"
diff --git a/tests/wpt/metadata/css/css-transforms/animation/perspective-interpolation.html.ini b/tests/wpt/metadata/css/css-transforms/animation/perspective-interpolation.html.ini
index 1193e3dfa5c..03f2f3fe9d1 100644
--- a/tests/wpt/metadata/css/css-transforms/animation/perspective-interpolation.html.ini
+++ b/tests/wpt/metadata/css/css-transforms/animation/perspective-interpolation.html.ini
@@ -1,5 +1,5 @@
 [perspective-interpolation.html]
-  expected: ERROR
+  expected: CRASH
   [ perspective interpolation]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini b/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
index c364dd10b5c..668c3f52a5b 100644
--- a/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
+++ b/tests/wpt/metadata/css/cssom-view/elementFromPoint-list-001.html.ini
@@ -14,6 +14,3 @@
   [<li>Outside 3</li>]
     expected: FAIL
 
-  [<li>Inside 1</li>]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/encoding/single-byte-decoder.html.ini b/tests/wpt/metadata/encoding/single-byte-decoder.html.ini
index 3d135f3bd66..939a36eb9d9 100644
--- a/tests/wpt/metadata/encoding/single-byte-decoder.html.ini
+++ b/tests/wpt/metadata/encoding/single-byte-decoder.html.ini
@@ -2,7 +2,6 @@
   type: testharness
 
 [single-byte-decoder.html?document]
-  expected: TIMEOUT
   [ISO-8859-4: iso_8859-4:1988 (document.characterSet and document.inputEncoding)]
     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 284ea0dcf02..9abfe827b60 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -312,24 +312,18 @@
   [<iframe>: combined response Content-Type: */* text/html]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html */*]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/html;" text/plain]
     expected: FAIL
 
-  [<iframe>: combined response Content-Type: text/html;charset=gbk text/plain text/html]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
-    expected: FAIL
-
-  [<iframe>: separate response Content-Type: text/html */*]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/plain */*]
     expected: FAIL
 
-  [<iframe>: separate response Content-Type: text/html;" \\" text/plain]
+  [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;x=" text/plain]
     expected: FAIL
 
diff --git a/tests/wpt/metadata/fetch/content-type/script.window.js.ini b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
index d2df9b78483..e67f0406fc3 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -53,6 +53,3 @@
   [combined text/javascript ]
     expected: FAIL
 
-  [separate text/javascript x/x]
-    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 b7052af5b5c..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%0D%0AX-Content-Type-Options%3A%20nosniff]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
deleted file mode 100644
index dc2e45516de..00000000000
--- a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[traverse_the_history_5.html]
-  [Multiple history traversals, last would be aborted]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/creating_browsing_context_test_01.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/creating_browsing_context_test_01.html.ini
deleted file mode 100644
index 16fa2c5cfc1..00000000000
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/creating_browsing_context_test_01.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[creating_browsing_context_test_01.html]
-  [first argument: absolute url]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
index bf50d59df41..e02f179ec25 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-innerwidth-innerheight.html.ini
@@ -1,5 +1,24 @@
 [open-features-negative-innerwidth-innerheight.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: negative values for legacy `innerwidth`, `innerheight`]
     expected: FAIL
 
+  [features "innerheight=-404.5" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "innerwidth=-404.5" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "innerwidth=-404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "innerheight=-404e1" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "innerheight=-404" should NOT set "height=404"]
+    expected: TIMEOUT
+
+  [features "innerwidth=-404e1" should NOT set "width=404"]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
index ad8840fbb68..940516ddd33 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-top-left.html.ini
@@ -1,5 +1,24 @@
 [open-features-negative-top-left.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: negative values for `top`, `left`]
     expected: FAIL
 
+  [features "top=-204" should NOT set "top=204"]
+    expected: TIMEOUT
+
+  [features "top=-204.5" should NOT set "top=204"]
+    expected: TIMEOUT
+
+  [features "left=-204" should NOT set "left=204"]
+    expected: TIMEOUT
+
+  [features "top=-0" should NOT set "top=204"]
+    expected: TIMEOUT
+
+  [features "left=-204.5" should NOT set "left=204"]
+    expected: TIMEOUT
+
+  [features "left=-0" should NOT set "left=204"]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
index 9027336b453..d1ed9088b2b 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-negative-width-height.html.ini
@@ -1,24 +1,5 @@
 [open-features-negative-width-height.html]
   type: testharness
-  expected: TIMEOUT
   [HTML: window.open `features`: negative values for `width`, `height`]
     expected: FAIL
 
-  [features "height=-404" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "height=-404e1" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "height=-404.5" should NOT set "height=404"]
-    expected: TIMEOUT
-
-  [features "width=-404" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "width=-404e1" should NOT set "width=404"]
-    expected: TIMEOUT
-
-  [features "width=-404.5" should NOT set "width=404"]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
index 10f617db69e..8540f53d8d6 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-top.html.ini
@@ -1,32 +1,42 @@
 [open-features-non-integer-top.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `top`]
     expected: FAIL
 
   [features "top=105/5" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105*3" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105LLl" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105e-1" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105.32" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105e1" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105  " should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105^4" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "top=105.5" should set "top=105"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [features "top=/104" should NOT set "top=104"]
+    expected: TIMEOUT
+
+  [features "top=_104" should NOT set "top=104"]
+    expected: TIMEOUT
+
+  [features "top=L104" should NOT set "top=104"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
index 28f93ee71b5..9d841e61bc0 100644
--- a/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
+++ b/tests/wpt/metadata/html/browsers/the-window-object/apis-for-creating-and-navigating-browsing-contexts-by-name/open-features-non-integer-width.html.ini
@@ -1,32 +1,48 @@
 [open-features-non-integer-width.html]
   type: testharness
+  expected: TIMEOUT
   [HTML: window.open `features`: non-integer values for feature `width`]
     expected: FAIL
 
   [features "width=405^4" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405.5" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405e1" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405  " should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405.32" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405LLl" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405*3" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405e-1" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
 
   [features "width=405/5" should set "width=405"]
-    expected: FAIL
+    expected: TIMEOUT
+
+  [top=0,left=0: absence of feature "width" should be treated same as "width=0"]
+    expected: TIMEOUT
+
+  [features "width=_404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [top=0,left=0,height=401,: absence of feature "width" should be treated same as "width=0"]
+    expected: TIMEOUT
+
+  [features "width=/404" should NOT set "width=404"]
+    expected: TIMEOUT
+
+  [features "width=L404" should NOT set "width=404"]
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini b/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
index 2532dceabac..fd369192a02 100644
--- a/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
+++ b/tests/wpt/metadata/html/browsers/windows/embedded-opener-remove-frame.html.ini
@@ -1,5 +1,5 @@
 [embedded-opener-remove-frame.html]
-  expected: CRASH
+  expected: TIMEOUT
   [opener and "removed" embedded documents]
     expected: FAIL
 
@@ -7,5 +7,5 @@
     expected: FAIL
 
   [opener of discarded auxiliary browsing context]
-    expected: FAIL
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
index 9df1ac56f2a..963d4cd20ef 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-1.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_nonescaping-1.html]
   type: testharness
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
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/html/semantics/forms/form-submission-0/form-double-submit-3.html.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit-3.html.ini
index df89cd21511..941d0dee0c8 100644
--- a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit-3.html.ini
@@ -1,5 +1,5 @@
 [form-double-submit-3.html]
   expected: ERROR
   [<button> should have the same double-submit protection as <input type=submit>]
-    expected: FAIL
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit.html.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit.html.ini
index dce74c6dd71..47a7bbb7975 100644
--- a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit.html.ini
+++ b/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit.html.ini
@@ -1,5 +1,5 @@
 [form-double-submit.html]
   expected: ERROR
   [default submit action should supersede onclick submit()]
-    expected: FAIL
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini
new file mode 100644
index 00000000000..178680e5d14
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/scripting-1/the-script-element/script-onerror-insertion-point-2.html.ini
@@ -0,0 +1,2 @@
+[script-onerror-insertion-point-2.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html.ini
new file mode 100644
index 00000000000..1e9b11d3487
--- /dev/null
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/unhandled-promise-rejections/promise-rejection-events-onerror.html.ini
@@ -0,0 +1,5 @@
+[promise-rejection-events-onerror.html]
+  expected: TIMEOUT
+  [Throwing inside an unhandledrejection handler invokes the error handler.]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/quirks/percentage-height-quirk-excludes-flex-grid-002.html.ini b/tests/wpt/metadata/quirks/percentage-height-quirk-excludes-flex-grid-002.html.ini
new file mode 100644
index 00000000000..cb37c253dd0
--- /dev/null
+++ b/tests/wpt/metadata/quirks/percentage-height-quirk-excludes-flex-grid-002.html.ini
@@ -0,0 +1,2 @@
+[percentage-height-quirk-excludes-flex-grid-002.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
new file mode 100644
index 00000000000..663a1f8fa30
--- /dev/null
+++ b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
@@ -0,0 +1,5 @@
+[018.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, javascript:]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata/webmessaging/without-ports/017.html.ini b/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
new file mode 100644
index 00000000000..064cf47545b
--- /dev/null
+++ b/tests/wpt/metadata/webmessaging/without-ports/017.html.ini
@@ -0,0 +1,5 @@
+[017.html]
+  expected: TIMEOUT
+  [origin of the script that invoked the method, about:blank]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/form-submission-0/form-submission-algorithm.html b/tests/wpt/web-platform-tests/html/semantics/forms/form-submission-0/form-submission-algorithm.html
index df39b57353c..2d5ac276374 100644
--- a/tests/wpt/web-platform-tests/html/semantics/forms/form-submission-0/form-submission-algorithm.html
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/form-submission-0/form-submission-algorithm.html
@@ -18,6 +18,21 @@ test(() => {
   assert_equals(counter, 2);
 }, 'If constructing entry list flag of form is true, then return');
 
+test(() => {
+  let form = populateForm('<input><input type=submit>');
+  let submitter1 = form.querySelector('input[type=submit]');
+  let valid = form.elements[0];
+  let counter = 0;
+  valid.oninvalid = () => {
+    ++counter;
+  };
+  form.onsubmit = () => {
+    valid.required = true;
+    submitter1.dispatchEvent(new MouseEvent("click"));
+  };
+  submitter1.dispatchEvent(new MouseEvent("click"));
+  assert_equals(counter, 0);
+}, "If firing submission events flag of form is true, then return");
 
 test(() => {
   let form = populateForm('<input required><input type=submit><button type=submit></button>');
diff --git a/tests/wpt/web-platform-tests/quirks/percentage-height-quirk-excludes-flex-grid-001.html b/tests/wpt/web-platform-tests/quirks/percentage-height-quirk-excludes-flex-grid-001.html
new file mode 100644
index 00000000000..cb0f772b1fa
--- /dev/null
+++ b/tests/wpt/web-platform-tests/quirks/percentage-height-quirk-excludes-flex-grid-001.html
@@ -0,0 +1,78 @@
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test: Percent height quirk does not traverse flex/grid containers</title>
+  <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
+  <link rel="author" href="https://mozilla.org" title="Mozilla">
+  <link rel="help" href="https://quirks.spec.whatwg.org/#the-percentage-height-calculation-quirk">
+  <link rel="match" href="reference/percentage-height-quirk-excludes-flex-grid-001-ref.html">
+  <meta name="assert" content="This quirk is specific to block boxes and table wrapper boxes; if it hits another type of box, it doesn't traverse further. So this file should look the same whether in quirks or standards mode.">
+  <style>
+    .fixed-height-outer {
+      height: 80px;
+      border: 1px solid gray;
+      margin-bottom: 5px;
+    }
+
+    .row-flex {
+      display: flex;
+      flex-direction: row
+    }
+
+    .column-flex {
+      display: flex;
+      flex-direction: column
+    }
+
+    .grid {
+      display: grid;
+    }
+
+    .container {
+      border: 3px solid black;
+    }
+
+    .pct {
+        height: 75%;
+        min-height: 10px;
+        width: 50px;
+        display: inline-block;
+        vertical-align: top;
+        background: purple;
+    }
+    .px {
+        height: 50px;
+        width: 50px;
+        display: inline-block;
+        vertical-align: top;
+        background: blue
+    }
+  </style>
+</head>
+<body>
+  <div class="fixed-height-outer">
+    <div class="container column-flex">
+      <div>
+        <div class="pct"></div>
+        <div class="px"></div>
+      </div>
+    </div>
+  </div>
+  <div class="fixed-height-outer">
+    <div class="container row-flex">
+      <div>
+        <div class="pct"></div>
+        <div class="px"></div>
+      </div>
+    </div>
+  </div>
+  <div class="fixed-height-outer">
+    <div class="container grid">
+      <div>
+        <div class="pct"></div>
+        <div class="px"></div>
+      </div>
+    </div>
+  </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/quirks/percentage-height-quirk-excludes-flex-grid-002.html b/tests/wpt/web-platform-tests/quirks/percentage-height-quirk-excludes-flex-grid-002.html
new file mode 100644
index 00000000000..88df89d0932
--- /dev/null
+++ b/tests/wpt/web-platform-tests/quirks/percentage-height-quirk-excludes-flex-grid-002.html
@@ -0,0 +1,56 @@
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Test: Percent height quirk applies for percent heights on flex/grid containers</title>
+  <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
+  <link rel="author" href="https://mozilla.org" title="Mozilla">
+  <link rel="help" href="https://quirks.spec.whatwg.org/#the-percentage-height-calculation-quirk">
+  <link rel="match" href="reference/percentage-height-quirk-excludes-flex-grid-002-ref.html">
+  <meta name="assert" content="This quirk only starts differentiating by box-type when looking at the containing block of the percent-height thing. So, the quirk applies to percent-heights on flex/grid containers, when the ancestors are all blocks up to the nearest definite height.">
+  <style>
+    .fixed-height-outer {
+      height: 80px;
+      border: 1px solid gray;
+      margin-bottom: 5px;
+    }
+
+    .row-flex {
+      display: flex;
+      flex-direction: row
+    }
+
+    .column-flex {
+      display: flex;
+      flex-direction: column
+    }
+
+    .grid {
+      display: grid;
+    }
+
+    .pct {
+        height: 75%;
+        min-height: 10px;
+        width: 50px;
+        background: purple;
+    }
+  </style>
+</head>
+<body>
+  <div class="fixed-height-outer">
+    <div>
+      <div class="column-flex pct"></div>
+    </div>
+  </div>
+  <div class="fixed-height-outer">
+    <div>
+      <div class="row-flex pct"></div>
+    </div>
+  </div>
+  <div class="fixed-height-outer">
+    <div>
+      <div class="grid pct"></div>
+    </div>
+  </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-001-ref.html b/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-001-ref.html
new file mode 100644
index 00000000000..29f8e26a67f
--- /dev/null
+++ b/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-001-ref.html
@@ -0,0 +1,76 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Reference: Percent height quirk does not traverse flex/grid containers</title>
+  <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
+  <link rel="author" href="https://mozilla.org" title="Mozilla">
+  <style>
+    .fixed-height-outer {
+      height: 80px;
+      border: 1px solid gray;
+      margin-bottom: 5px;
+    }
+
+    .row-flex {
+      display: flex;
+      flex-direction: row
+    }
+
+    .column-flex {
+      display: flex;
+      flex-direction: column
+    }
+
+    .grid {
+      display: grid;
+    }
+
+    .container {
+      border: 3px solid black;
+    }
+
+    .pct {
+        height: 75%;
+        min-height: 10px;
+        width: 50px;
+        display: inline-block;
+        vertical-align: top;
+        background: purple;
+    }
+    .px {
+        height: 50px;
+        width: 50px;
+        display: inline-block;
+        vertical-align: top;
+        background: blue
+    }
+  </style>
+</head>
+<body>
+  <div class="fixed-height-outer">
+    <div class="container column-flex">
+      <div>
+        <div class="pct"></div>
+        <div class="px"></div>
+      </div>
+    </div>
+  </div>
+  <div class="fixed-height-outer">
+    <div class="container row-flex">
+      <div>
+        <div class="pct"></div>
+        <div class="px"></div>
+      </div>
+    </div>
+  </div>
+  <div class="fixed-height-outer">
+    <div class="container grid">
+      <div>
+        <div class="pct"></div>
+        <div class="px"></div>
+      </div>
+    </div>
+  </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-002-notref.html b/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-002-notref.html
new file mode 100644
index 00000000000..19aa243a004
--- /dev/null
+++ b/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-002-notref.html
@@ -0,0 +1,54 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Not-reference case: Percent height quirk applies for percent heights on flex/grid containers</title>
+  <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
+  <link rel="author" href="https://mozilla.org" title="Mozilla">
+  <style>
+    .fixed-height-outer {
+      height: 80px;
+      border: 1px solid gray;
+      margin-bottom: 5px;
+    }
+
+    .row-flex {
+      display: flex;
+      flex-direction: row
+    }
+
+    .column-flex {
+      display: flex;
+      flex-direction: column
+    }
+
+    .grid {
+      display: grid;
+    }
+
+    .pct {
+        height: 75%;
+        min-height: 10px;
+        width: 50px;
+        background: purple;
+    }
+  </style>
+</head>
+<body>
+  <div class="fixed-height-outer">
+    <div>
+      <div class="column-flex pct"></div>
+    </div>
+  </div>
+  <div class="fixed-height-outer">
+    <div>
+      <div class="row-flex pct"></div>
+    </div>
+  </div>
+  <div class="fixed-height-outer">
+    <div>
+      <div class="grid pct"></div>
+    </div>
+  </div>
+</body>
+</html>
diff --git a/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-002-ref.html b/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-002-ref.html
new file mode 100644
index 00000000000..c63bc0efa85
--- /dev/null
+++ b/tests/wpt/web-platform-tests/quirks/reference/percentage-height-quirk-excludes-flex-grid-002-ref.html
@@ -0,0 +1,49 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8">
+  <title>Reference case: Percent height quirk applies for percent heights on flex/grid containers</title>
+  <link rel="author" title="Daniel Holbert" href="mailto:dholbert@mozilla.com">
+  <link rel="author" href="https://mozilla.org" title="Mozilla">
+  <link rel="mismatch" href="percentage-height-quirk-excludes-flex-grid-002-notref.html">
+  <style>
+    .fixed-height-outer {
+      height: 80px;
+      border: 1px solid gray;
+      margin-bottom: 5px;
+    }
+
+    .row-flex {
+      display: flex;
+      flex-direction: row
+    }
+
+    .column-flex {
+      display: flex;
+      flex-direction: column
+    }
+
+    .grid {
+      display: grid;
+    }
+
+    .pct {
+        height: 75%;
+        min-height: 10px;
+        width: 50px;
+        background: purple;
+    }
+  </style>
+</head>
+<body>
+  <div class="fixed-height-outer">
+    <div class="column-flex pct"></div>
+  </div>
+  <div class="fixed-height-outer">
+    <div class="row-flex pct"></div>
+  </div>
+  <div class="fixed-height-outer">
+    <div class="grid pct"></div>
+  </div>
+</body>
+</html>