diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index e545fc5665c..f8fe29e74ea 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -128241,6 +128241,18 @@
      {}
     ]
    ],
+   "css/css-multicol/multicol-span-all-dynamic-remove-007.html": [
+    [
+     "/css/css-multicol/multicol-span-all-dynamic-remove-007.html",
+     [
+      [
+       "/css/css-multicol/multicol-span-all-dynamic-remove-001-ref.html",
+       "=="
+      ]
+     ],
+     {}
+    ]
+   ],
    "css/css-multicol/multicol-span-all-list-item-001.html": [
     [
      "/css/css-multicol/multicol-span-all-list-item-001.html",
@@ -556986,6 +556998,10 @@
    "bbcce11c40fb0ef58b686cd4879103bcdfabc479",
    "reftest"
   ],
+  "css/css-multicol/multicol-span-all-dynamic-remove-007.html": [
+   "5b23814aed9cef84c83997198c80e169bc37c1d6",
+   "reftest"
+  ],
   "css/css-multicol/multicol-span-all-list-item-001-ref.html": [
    "4f3fe18a6d5804a4a7a6874fd46d5614c0a8dff2",
    "support"
@@ -598247,7 +598263,7 @@
    "reftest"
   ],
   "css/vendor-imports/mozilla/mozilla-central-reftests/ui3/reftest.list": [
-   "c63b1f5a97823ece085c709db809d648cfcdbdce",
+   "4e493c8ff47b908dde4122ab8b3349568191fe7e",
    "support"
   ],
   "css/vendor-imports/mozilla/mozilla-central-reftests/ui3/support/replaced-min-max-1.png": [
diff --git a/tests/wpt/metadata/css/css-backgrounds/background-repeat/background-repeat-round-roundup.xht.ini b/tests/wpt/metadata/css/css-backgrounds/background-repeat/background-repeat-round-roundup.xht.ini
deleted file mode 100644
index f20284a5396..00000000000
--- a/tests/wpt/metadata/css/css-backgrounds/background-repeat/background-repeat-round-roundup.xht.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[background-repeat-round-roundup.xht]
-  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-backgrounds/background-size-027.html.ini b/tests/wpt/metadata/css/css-backgrounds/background-size-027.html.ini
deleted file mode 100644
index 5c1f927e20e..00000000000
--- a/tests/wpt/metadata/css/css-backgrounds/background-size-027.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[background-size-027.html]
-  expected: FAIL
diff --git a/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini b/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
index 74c8ac29f3e..be7dc942c8c 100644
--- a/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
+++ b/tests/wpt/metadata/css/css-fonts/variations/at-font-face-font-matching.html.ini
@@ -329,3 +329,9 @@
   [Matching font-weight: '430' should prefer '420 440' over '450 460']
     expected: FAIL
 
+  [Matching font-style: 'oblique -20deg' should prefer 'oblique 30deg 60deg' over 'oblique 40deg 50deg']
+    expected: FAIL
+
+  [Matching font-style: 'oblique 0deg' should prefer 'oblique 15deg 20deg' over 'oblique 30deg 60deg']
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/css/css-fonts/variations/font-weight-matching.html.ini b/tests/wpt/metadata/css/css-fonts/variations/font-weight-matching.html.ini
index 6bc0db2fe56..3012b72a8fd 100644
--- a/tests/wpt/metadata/css/css-fonts/variations/font-weight-matching.html.ini
+++ b/tests/wpt/metadata/css/css-fonts/variations/font-weight-matching.html.ini
@@ -32,9 +32,6 @@
   [Test @font-face matching for weight 249]
     expected: FAIL
 
-  [Test @font-face matching for weight 420]
-    expected: FAIL
-
   [Test @font-face matching for weight 250]
     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/semantics/embedded-content/media-elements/event_timeupdate_noautoplay.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/media-elements/event_timeupdate_noautoplay.html.ini
index 22d1f1d6900..a6f7ac6f249 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/media-elements/event_timeupdate_noautoplay.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/media-elements/event_timeupdate_noautoplay.html.ini
@@ -5,5 +5,5 @@
     expected: NOTRUN
 
   [calling play() on a sufficiently long video should trigger timeupdate event]
-    expected: NOTRUN
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html.ini
index e879de13c09..8c50bd0c259 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/environment-changes/viewport-change.html.ini
@@ -2,7 +2,7 @@
   type: testharness
   expected: TIMEOUT
   [picture: source (max-width:500px) broken image, img valid image, resize to wide]
-    expected: TIMEOUT
+    expected: FAIL
 
   [picture: source (max-width:500px) valid image, img valid image, resize to wide]
     expected: FAIL
@@ -11,23 +11,5 @@
     expected: TIMEOUT
 
   [picture: source (max-width:500px) valid image, img valid image, resize to narrow]
-    expected: FAIL
-
-  [picture: same URL in source (max-width:500px) and img, resize to narrow]
-    expected: FAIL
-
-  [picture: source (max-width:500px) broken image, img valid image, resize to narrow]
-    expected: FAIL
-
-  [img (srcset 1 cand) valid image, resize to wide]
-    expected: FAIL
-
-  [picture: same URL in source (max-width:500px) and img, resize to wide]
-    expected: FAIL
-
-  [img (srcset 1 cand) valid image, resize to narrow]
-    expected: FAIL
-
-  [picture: source (max-width:500px) valid image, img broken image, resize to wide]
-    expected: FAIL
+    expected: TIMEOUT
 
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/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-width-1000px.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-width-1000px.html.ini
new file mode 100644
index 00000000000..c3522eadce0
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-img-element/sizes/parse-a-sizes-attribute-width-1000px.html.ini
@@ -0,0 +1,52 @@
+[parse-a-sizes-attribute-width-1000px.html]
+  [<img srcset="/images/green-1x1.png?e37a 50w, /images/green-16x16.png?e37a 51w" sizes="(min-width:0) min(1px, 100px)"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?f49b 50w, /images/green-16x16.png?f49b 51w" sizes="(min-width:0) max(-200vw, 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e38b 50w, /images/green-16x16.png?e38b 51w" sizes="(min-width:max(-200vw, 0)) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e60 50w, /images/green-16x16.png?e60 51w" sizes="(min-width:0) or (min-width:-1px) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e37b 50w, /images/green-16x16.png?e37b 51w" sizes="(min-width:0) max(-100px, 1px)"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e38a 50w, /images/green-16x16.png?e38a 51w" sizes="(min-width:min(0, 200vw)) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e61 50w, /images/green-16x16.png?e61 51w" sizes="(min-width:0) or (unknown &quot;general-enclosed&quot;) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e36b 50w, /images/green-16x16.png?e36b 51w" sizes="min(-100px, 1px)"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?f48b 50w, /images/green-16x16.png?f48b 51w" sizes="max(-200vw, 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?f48a 50w, /images/green-16x16.png?f48a 51w" sizes="min(1px, 200vw"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e38 50w, /images/green-16x16.png?e38 51w" sizes="(min-width:calc(0)) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e58 50w, /images/green-16x16.png?e58 51w" sizes="(min-width:0) or (unknown-mf-name) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e62 50w, /images/green-16x16.png?e62 51w" sizes="(min-width:0) or unknown-general-enclosed(foo) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e59 50w, /images/green-16x16.png?e59 51w" sizes="(min-width:0) or (min-width:unknown-mf-value) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e106 50w, /images/green-16x16.png?e106 51w" sizes="(min-width:0) or (unknown-general-enclosed !) 1px"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?e36a 50w, /images/green-16x16.png?e36a 51w" sizes="min(1px, 100px)"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
+  [<img srcset="/images/green-1x1.png?f49a 50w, /images/green-16x16.png?f49a 51w" sizes="(min-width:0) min(1px, 200vw"> ref sizes="1px" (width:1000px)]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/aborted-parser.window.js.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/aborted-parser.window.js.ini
index c6d49957c4a..ce482a60da8 100644
--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/aborted-parser.window.js.ini
+++ b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/aborted-parser.window.js.ini
@@ -2,3 +2,6 @@
   [document.open() after parser is aborted]
     expected: FAIL
 
+  [async document.open() after parser is aborted]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/bailout-side-effects-synchronous-script.window.js.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/bailout-side-effects-synchronous-script.window.js.ini
deleted file mode 100644
index 02eeed3e980..00000000000
--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/opening-the-input-stream/bailout-side-effects-synchronous-script.window.js.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[bailout-side-effects-synchronous-script.window.html]
-  [document.open bailout should not have any side effects (active parser whose script nesting level is greater than 0)]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini b/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini
index 7725b118e9d..99a24216c88 100644
--- a/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini
+++ b/tests/wpt/metadata/performance-timeline/webtiming-resolution.any.js.ini
@@ -12,6 +12,3 @@
   [Verifies the resolution of entry.startTime is at least 5 microseconds.]
     expected: TIMEOUT
 
-  [Verifies the resolution of performance.now() is at least 5 microseconds.]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/quirks/unitless-length/limited-quirks.html.ini b/tests/wpt/metadata/quirks/unitless-length/limited-quirks.html.ini
deleted file mode 100644
index c7e9c7434f5..00000000000
--- a/tests/wpt/metadata/quirks/unitless-length/limited-quirks.html.ini
+++ /dev/null
@@ -1,283 +0,0 @@
-[limited-quirks.html]
-  [top: -\\31 .5]
-    expected: FAIL
-
-  [bottom: -1A]
-    expected: FAIL
-
-  [bottom: -1a]
-    expected: FAIL
-
-  [top: @1]
-    expected: FAIL
-
-  [top: "1a"]
-    expected: FAIL
-
-  [top: @a]
-    expected: FAIL
-
-  [bottom: "1"]
-    expected: FAIL
-
-  [bottom: -/**/1]
-    expected: FAIL
-
-  [top: +/**/1]
-    expected: FAIL
-
-  [bottom: @1a]
-    expected: FAIL
-
-  [top: 1\\31 ]
-    expected: FAIL
-
-  [top: url('1')]
-    expected: FAIL
-
-  [bottom: -\\31 ]
-    expected: FAIL
-
-  [top: calc(1)]
-    expected: FAIL
-
-  [top: \\31 ]
-    expected: FAIL
-
-  [bottom: +1\\31 ]
-    expected: FAIL
-
-  [bottom: 1\\31 .5]
-    expected: FAIL
-
-  [bottom: #0001]
-    expected: FAIL
-
-  [top: calc(2 * 2px)]
-    expected: FAIL
-
-  [bottom: 1a]
-    expected: FAIL
-
-  [bottom: A]
-    expected: FAIL
-
-  [bottom: #01]
-    expected: FAIL
-
-  [top: +\\31 .5]
-    expected: FAIL
-
-  [bottom: #1]
-    expected: FAIL
-
-  [top: -/**/1]
-    expected: FAIL
-
-  [bottom: +\\31 .5]
-    expected: FAIL
-
-  [bottom: \\31 ]
-    expected: FAIL
-
-  [bottom: calc(1)]
-    expected: FAIL
-
-  [top: #001]
-    expected: FAIL
-
-  [top: +\\31 ]
-    expected: FAIL
-
-  [bottom: +\\31 ]
-    expected: FAIL
-
-  [top: +1.5]
-    expected: FAIL
-
-  [top: +1\\31 ]
-    expected: FAIL
-
-  [bottom: @a]
-    expected: FAIL
-
-  [bottom: @1]
-    expected: FAIL
-
-  [top: #1]
-    expected: FAIL
-
-  [top: 1a]
-    expected: FAIL
-
-  [bottom: +1a]
-    expected: FAIL
-
-  [bottom: +1A]
-    expected: FAIL
-
-  [bottom: "a"]
-    expected: FAIL
-
-  [top: #00001]
-    expected: FAIL
-
-  [bottom: -1\\31 .5]
-    expected: FAIL
-
-  [top: "1"]
-    expected: FAIL
-
-  [bottom: 1.5]
-    expected: FAIL
-
-  [bottom: -\\31 .5]
-    expected: FAIL
-
-  [bottom: url('1')]
-    expected: FAIL
-
-  [bottom: -1.5]
-    expected: FAIL
-
-  [top: \\31 .5]
-    expected: FAIL
-
-  [bottom: "1a"]
-    expected: FAIL
-
-  [bottom: calc(2 * 2px)]
-    expected: FAIL
-
-  [bottom: +1\\31 .5]
-    expected: FAIL
-
-  [bottom: 1\\31 ]
-    expected: FAIL
-
-  [bottom: +/**/1]
-    expected: FAIL
-
-  [bottom: #00001]
-    expected: FAIL
-
-  [top: url(1)]
-    expected: FAIL
-
-  [bottom: #001]
-    expected: FAIL
-
-  [top: +1\\31 .5]
-    expected: FAIL
-
-  [top: -1a]
-    expected: FAIL
-
-  [top: -1A]
-    expected: FAIL
-
-  [bottom: url(1)]
-    expected: FAIL
-
-  [top: a]
-    expected: FAIL
-
-  [top: A]
-    expected: FAIL
-
-  [top: #000001]
-    expected: FAIL
-
-  [top: 1]
-    expected: FAIL
-
-  [top: 1\\31 .5]
-    expected: FAIL
-
-  [bottom: a]
-    expected: FAIL
-
-  [bottom: 1]
-    expected: FAIL
-
-  [bottom: +1]
-    expected: FAIL
-
-  [bottom: #000001]
-    expected: FAIL
-
-  [bottom: +a]
-    expected: FAIL
-
-  [bottom: +A]
-    expected: FAIL
-
-  [top: 1.5]
-    expected: FAIL
-
-  [top: +A]
-    expected: FAIL
-
-  [top: +a]
-    expected: FAIL
-
-  [top: +1]
-    expected: FAIL
-
-  [top: -1.5]
-    expected: FAIL
-
-  [top: -1\\31 .5]
-    expected: FAIL
-
-  [top: +1a]
-    expected: FAIL
-
-  [top: +1A]
-    expected: FAIL
-
-  [top: @1a]
-    expected: FAIL
-
-  [bottom: \\31 .5]
-    expected: FAIL
-
-  [top: "a"]
-    expected: FAIL
-
-  [top: #01]
-    expected: FAIL
-
-  [bottom: +1.5]
-    expected: FAIL
-
-  [bottom: -A]
-    expected: FAIL
-
-  [bottom: -a]
-    expected: FAIL
-
-  [bottom: -1\\31 ]
-    expected: FAIL
-
-  [top: #0001]
-    expected: FAIL
-
-  [bottom: -1]
-    expected: FAIL
-
-  [top: -\\31 ]
-    expected: FAIL
-
-  [top: -A]
-    expected: FAIL
-
-  [top: -a]
-    expected: FAIL
-
-  [top: -1]
-    expected: FAIL
-
-  [top: -1\\31 ]
-    expected: FAIL
-
diff --git a/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-dynamic-remove-007.html b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-dynamic-remove-007.html
new file mode 100644
index 00000000000..5b23814aed9
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/css-multicol/multicol-span-all-dynamic-remove-007.html
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html class="reftest-wait">
+  <meta charset="utf-8">
+  <title>CSS Multi-column Layout Test: Remove the position:fixed spanner as the first 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-dynamic-remove-001-ref.html">
+  <meta name="assert" content="This test checks removing a position:fixed 'column-span:all' element (which doesn't actually span columns) should be rendered correctly.">
+
+  <script>
+  function runTest() {
+    document.body.offsetHeight;
+
+    document.getElementById("spanner").remove();
+
+    document.documentElement.removeAttribute("class");
+  }
+  </script>
+
+  <style>
+  #column {
+    column-count: 3;
+    column-rule: 6px solid;
+    width: 400px;
+    outline: 1px solid black;
+  }
+  h3 {
+    position: fixed;
+    column-span: all;
+    outline: 1px solid blue;
+  }
+  </style>
+
+  <body onload="runTest();">
+    <article id="column">
+      <h3 id="spanner">spanner</h3>
+      <div>block1</div>
+      <div>block2</div>
+    </article>
+  </body>
+</html>
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/ui3/reftest.list b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/ui3/reftest.list
index c63b1f5a978..4e493c8ff47 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/ui3/reftest.list
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/ui3/reftest.list
@@ -7,4 +7,4 @@
 == box-sizing-content-box-003.xht box-sizing-content-box-003-ref.xht
 == box-sizing-replaced-001.xht box-sizing-replaced-001-ref.xht
 == box-sizing-replaced-002.xht box-sizing-replaced-002-ref.xht
-== box-sizing-replaced-003.xht box-sizing-replaced-003-ref.xht
+skip-if(cocoaWidget) == box-sizing-replaced-003.xht box-sizing-replaced-003-ref.xht # Bug 1383454