diff --git a/tests/wpt/metadata-layout-2020/css/css-transforms/transform-scale-hittest.html.ini b/tests/wpt/metadata-layout-2020/css/css-transforms/transform-scale-hittest.html.ini
index f8e7e539aae..4a1e8110f6f 100644
--- a/tests/wpt/metadata-layout-2020/css/css-transforms/transform-scale-hittest.html.ini
+++ b/tests/wpt/metadata-layout-2020/css/css-transforms/transform-scale-hittest.html.ini
@@ -2,6 +2,3 @@
   [Hit test intersecting scaled box]
     expected: FAIL
 
-  [Hit test within unscaled box]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/css/cssom-view/matchMedia-display-none-iframe.html.ini b/tests/wpt/metadata-layout-2020/css/cssom-view/matchMedia-display-none-iframe.html.ini
deleted file mode 100644
index e6e1f29e274..00000000000
--- a/tests/wpt/metadata-layout-2020/css/cssom-view/matchMedia-display-none-iframe.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[matchMedia-display-none-iframe.html]
-  expected: ERROR
diff --git a/tests/wpt/metadata-layout-2020/css/selectors/selectors-dir-selector-auto-direction-change-001.html.ini b/tests/wpt/metadata-layout-2020/css/selectors/selectors-dir-selector-auto-direction-change-001.html.ini
new file mode 100644
index 00000000000..3139f117686
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/css/selectors/selectors-dir-selector-auto-direction-change-001.html.ini
@@ -0,0 +1,2 @@
+[selectors-dir-selector-auto-direction-change-001.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
index f19b9a10240..c485e666fe5 100644
--- a/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-type/response.window.js.ini
@@ -309,21 +309,30 @@
   [Response: combined response Content-Type: text/html;" \\" text/plain ";charset=GBK]
     expected: NOTRUN
 
-  [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/html */*]
     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
-
   [<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>: separate response Content-Type: text/html;" text/plain]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;" \\" text/plain]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini b/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
index d2df9b78483..b4bec16ae8a 100644
--- a/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata-layout-2020/fetch/content-type/script.window.js.ini
@@ -56,3 +56,9 @@
   [separate text/javascript x/x]
     expected: FAIL
 
+  [separate text/javascript;charset=windows-1252 error text/javascript]
+    expected: FAIL
+
+  [separate text/javascript; charset=windows-1252 text/javascript]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/fetch/cross-origin-resource-policy/image-loads.html.ini b/tests/wpt/metadata-layout-2020/fetch/cross-origin-resource-policy/image-loads.html.ini
new file mode 100644
index 00000000000..7d26a22aeb9
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/fetch/cross-origin-resource-policy/image-loads.html.ini
@@ -0,0 +1,2 @@
+[image-loads.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
new file mode 100644
index 00000000000..dc2e45516de
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
@@ -0,0 +1,4 @@
+[traverse_the_history_5.html]
+  [Multiple history traversals, last would be aborted]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/sandboxing/window-open-blank-from-different-initiator.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/sandboxing/window-open-blank-from-different-initiator.html.ini
new file mode 100644
index 00000000000..7f957864586
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/browsers/sandboxing/window-open-blank-from-different-initiator.html.ini
@@ -0,0 +1,8 @@
+[window-open-blank-from-different-initiator.html]
+  expected: TIMEOUT
+  [No pending navigation]
+    expected: NOTRUN
+
+  [One pending navigation]
+    expected: TIMEOUT
+
diff --git a/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini b/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini
index f29162631b3..9a85a905394 100644
--- a/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/browsers/windows/embedded-opener-remove-frame.html.ini
@@ -1,8 +1,7 @@
 [embedded-opener-remove-frame.html]
-  expected: CRASH
   [opener of discarded nested browsing context]
     expected: FAIL
 
   [opener of discarded auxiliary browsing context]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 88f4ddd0e9a..42ebcc9d57e 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_escaping-1.html]
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index 93673c2a0db..295031c1812 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_escaping-3.html]
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: FAIL
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
index 0407f0cc2b7..9eb581fcf1f 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_nonescaping-2.html]
-  expected: TIMEOUT
+  expected: CRASH
   [Check that popups from a sandboxed iframe do not escape the sandbox]
     expected: NOTRUN
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index 7d2b5231af2..f4f994c5d6f 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_nonescaping-3.html]
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: FAIL
+    expected: NOTRUN
 
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/form-double-submit-3.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/form-double-submit-3.html.ini
deleted file mode 100644
index 9f416703229..00000000000
--- a/tests/wpt/metadata-layout-2020/html/semantics/forms/form-submission-0/form-double-submit-3.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[form-double-submit-3.html]
-  [<button> should have the same double-submit protection as <input type=submit>]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/forms/textfieldselection/select-event.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/forms/textfieldselection/select-event.html.ini
index 395fd310c84..4db3c97cc62 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/forms/textfieldselection/select-event.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/forms/textfieldselection/select-event.html.ini
@@ -1,13 +1,7 @@
 [select-event.html]
-  [input type url: setRangeText() a second time (must not fire select)]
-    expected: FAIL
-
   [textarea: selectionDirection a second time (must not fire select)]
     expected: FAIL
 
-  [input type password: setRangeText() a second time (must not fire select)]
-    expected: FAIL
-
   [input type search: setRangeText() a second time (must not fire select)]
     expected: FAIL
 
@@ -17,51 +11,18 @@
   [textarea: setSelectionRange() a second time (must not fire select)]
     expected: FAIL
 
-  [input type text: setSelectionRange out of range a second time (must not fire select)]
-    expected: FAIL
-
-  [input type password: selectionEnd a second time (must not fire select)]
-    expected: FAIL
-
-  [input type tel: selectionEnd out of range a second time (must not fire select)]
-    expected: FAIL
-
-  [input type password: selectionStart a second time (must not fire select)]
-    expected: FAIL
-
   [input type url: setSelectionRange() a second time (must not fire select)]
     expected: FAIL
 
-  [input type url: selectionEnd out of range a second time (must not fire select)]
-    expected: FAIL
-
   [input type password: selectionEnd out of range a second time (must not fire select)]
     expected: FAIL
 
-  [input type search: setSelectionRange out of range a second time (must not fire select)]
-    expected: FAIL
-
   [input type search: setSelectionRange() a second time (must not fire select)]
     expected: FAIL
 
-  [textarea: selectionStart a second time (must not fire select)]
-    expected: FAIL
-
-  [input type tel: selectionStart out of range a second time (must not fire select)]
-    expected: FAIL
-
   [input type tel: selectionDirection a second time (must not fire select)]
     expected: FAIL
 
-  [input type url: select() a second time (must not fire select)]
-    expected: FAIL
-
-  [input type url: selectionDirection a second time (must not fire select)]
-    expected: FAIL
-
-  [input type search: selectionEnd out of range a second time (must not fire select)]
-    expected: FAIL
-
   [input type search: selectionDirection a second time (must not fire select)]
     expected: FAIL
 
@@ -77,3 +38,33 @@
   [input type url: selectionStart a second time (must not fire select)]
     expected: FAIL
 
+  [input type password: select() a second time (must not fire select)]
+    expected: FAIL
+
+  [input type text: setSelectionRange() a second time (must not fire select)]
+    expected: FAIL
+
+  [input type url: selectionStart out of range a second time (must not fire select)]
+    expected: FAIL
+
+  [input type search: selectionStart out of range a second time (must not fire select)]
+    expected: FAIL
+
+  [input type tel: setSelectionRange() a second time (must not fire select)]
+    expected: FAIL
+
+  [input type text: selectionDirection a second time (must not fire select)]
+    expected: FAIL
+
+  [textarea: setSelectionRange out of range a second time (must not fire select)]
+    expected: FAIL
+
+  [input type text: setRangeText() a second time (must not fire select)]
+    expected: FAIL
+
+  [input type password: selectionDirection a second time (must not fire select)]
+    expected: FAIL
+
+  [input type url: setSelectionRange out of range a second time (must not fire select)]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html.ini
index 18ff1b7eca3..1b8e42a9ef8 100644
--- a/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html.ini
@@ -5,3 +5,9 @@
   [popup element basic show/hide behavior]
     expected: FAIL
 
+  [The only visibility control for <popup> is through .show() and .hide().]
+    expected: FAIL
+
+  [The IDL "open" content attribute must have no effect, and must not be reflected to the WebIDL.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html.ini
new file mode 100644
index 00000000000..bc8691791da
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html.ini
@@ -0,0 +1,2 @@
+[popup-hidden-display.tentative.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html.ini b/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html.ini
new file mode 100644
index 00000000000..8d5d74ea19f
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html.ini
@@ -0,0 +1,2 @@
+[popup-open-display.tentative.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
deleted file mode 100644
index 59a54fe88e4..00000000000
--- a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[module-delayed.html]
-  [async document.write in a module]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
deleted file mode 100644
index fca4d908c89..00000000000
--- a/tests/wpt/metadata-layout-2020/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[module-static-import-delayed.html]
-  [document.write in an imported module]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
index 5ddb9bfeff6..a1effd5f801 100644
--- a/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
+++ b/tests/wpt/metadata-layout-2020/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
@@ -1,10 +1,9 @@
 [promise-job-entry.html]
-  expected: TIMEOUT
   [Fulfillment handler on fulfilled promise]
     expected: FAIL
 
   [Rejection handler on pending-then-rejected promise]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Sanity check: this all works as expected with no promises involved]
     expected: FAIL
@@ -16,5 +15,5 @@
     expected: FAIL
 
   [Fulfillment handler on pending-then-fulfilled promise]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata-layout-2020/webmessaging/with-ports/017.html.ini b/tests/wpt/metadata-layout-2020/webmessaging/with-ports/017.html.ini
deleted file mode 100644
index 064cf47545b..00000000000
--- a/tests/wpt/metadata-layout-2020/webmessaging/with-ports/017.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata-layout-2020/webmessaging/with-ports/018.html.ini b/tests/wpt/metadata-layout-2020/webmessaging/with-ports/018.html.ini
deleted file mode 100644
index 663a1f8fa30..00000000000
--- a/tests/wpt/metadata-layout-2020/webmessaging/with-ports/018.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[018.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, javascript:]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini b/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini
new file mode 100644
index 00000000000..80f9a4f15b8
--- /dev/null
+++ b/tests/wpt/metadata-layout-2020/workers/constructors/Worker/Worker-constructor.html.ini
@@ -0,0 +1,2 @@
+[Worker-constructor.html]
+  expected: ERROR
diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 4815ff4fb39..3481353a7c4 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -121652,7 +121652,7 @@
       ]
      ],
      "nested-scale-animations.html": [
-      "c96e555848f0886ceeaa563edd0b878b1fddd59a",
+      "ba2f96939fdfdcbca16a4fdc3a8f6872b883d165",
       [
        null,
        [
@@ -121661,23 +121661,7 @@
          "=="
         ]
        ],
-       {
-        "fuzzy": [
-         [
-          null,
-          [
-           [
-            0,
-            255
-           ],
-           [
-            0,
-            400
-           ]
-          ]
-         ]
-        ]
-       }
+       {}
       ]
      ],
      "transform-animation-under-large-scale.html": [
@@ -231842,6 +231826,19 @@
        {}
       ]
      ],
+     "selectors-dir-selector-auto-direction-change-001.html": [
+      "f6c6393b08a940054b90b68fe3ebea9ebc8846ec",
+      [
+       null,
+       [
+        [
+         "/css/reference/ref-filled-green-100px-square.xht",
+         "=="
+        ]
+       ],
+       {}
+      ]
+     ],
      "selectors-dir-selector-change-001.html": [
       "f952389643834f4a67062bf722d5ce4422253094",
       [
@@ -249997,6 +249994,36 @@
        ]
       }
      },
+     "interactive-elements": {
+      "the-popup-element": {
+       "popup-hidden-display.tentative.html": [
+        "c80aecf1d30a3686584bd0bea5988a0ddcc32e19",
+        [
+         null,
+         [
+          [
+           "/html/semantics/interactive-elements/the-popup-element/popup-hidden-display-ref.tentative.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ],
+       "popup-open-display.tentative.html": [
+        "0f6bd930212e2e9dd210c9af5814af5072706588",
+        [
+         null,
+         [
+          [
+           "/html/semantics/interactive-elements/the-popup-element/popup-open-display-ref.tentative.html",
+           "=="
+          ]
+         ],
+         {}
+        ]
+       ]
+      }
+     },
      "links": {
       "linktypes": {
        "alternate-css.html": [
@@ -281901,7 +281928,7 @@
       "338bea13b84a2f5c4d95b778637409e2bf8d3263",
       []
      ],
-     "frame-src-same-document.html.headers": [
+     "frame-src-same-document.sub.html.headers": [
       "6502444407f59e6ea08da63c8dcdb22978e5ae83",
       []
      ],
@@ -302004,7 +302031,7 @@
       []
      ],
      "nested-scale-animations-ref.html": [
-      "14b41366268c3a33f2d49e477bab2d40c6acb432",
+      "feef006417e5ff6687448ee11e3ad3f2757fe871",
       []
      ],
      "support": {
@@ -332482,7 +332509,7 @@
           []
          ],
          "test-common.css": [
-          "dcbf4e1e0240bf622edcea2b7f68f58d89c5ff82",
+          "218dfcb77060426b0588dd5b28979a4a038befd4",
           []
          ]
         },
@@ -338388,7 +338415,7 @@
     ],
     "resources": {
      "test-expectations.js": [
-      "cc9b4ca3d121413ca4fa4bae5f255ff1e6dbe68e",
+      "844eb92f95eaf5f2406eb60a8cccb78a5c8484b3",
       []
      ],
      "window-tests-blob.js": [
@@ -340663,6 +340690,10 @@
        []
       ],
       "resources": {
+       "204-no-content.asis": [
+        "58e46abbc9e0d5d744cc41d49fdb869d23e23801",
+        []
+       ],
        "check-sandbox-flags.html": [
         "0dc95315f164d693bd7bd0622880781f30bad7a1",
         []
@@ -340671,6 +340702,10 @@
         "136c494d5ad866a12e361b95e8ca29e377f4c0fd",
         []
        ],
+       "executor.html": [
+        "89bd268f9c73343f64648e91ed618c3e7096f567",
+        []
+       ],
        "post-done-to-opener.html": [
         "b47f0f274ef43148d3be418e2c0628a567f1c3c1",
         []
@@ -345227,166 +345262,6 @@
         "373309d1a9284f48510c34c86de6f625b381682d",
         []
        ],
-       "plugin": {
-        "click-to-activate.js": [
-         "2ea2f19c2c951973a85f1a12cd9f964204218db8",
-         []
-        ],
-        "dragndrop.swf": [
-         "6b49d46c5f2deec418cc9acbd0039dc21f32db6c",
-         []
-        ],
-        "dragndropleavedeactivate.swf": [
-         "be486248d13667d4fa873cdfc4def134bdc0959a",
-         []
-        ],
-        "plugin-dnd-001.html": [
-         "96a502004410f976c2762992176310b00416c8d3",
-         []
-        ],
-        "plugin-dnd-002.html": [
-         "2958458e7eaad99dcd4efbca0d08c1266d4aa230",
-         []
-        ],
-        "plugin-dnd-003.html": [
-         "592192124ffad10624814a14880be1ce0fa4f527",
-         []
-        ],
-        "plugin-dnd-004.html": [
-         "a4e776be74e749961f17313d673a815b7487e2f1",
-         []
-        ],
-        "plugin-dnd-005.html": [
-         "67035acc71a0edf5eed3abcf5212b8f63c883614",
-         []
-        ],
-        "plugin-dnd-006.html": [
-         "5322edd7d66dfe6b18f93697e154707b028155a3",
-         []
-        ],
-        "plugin-dnd-007.html": [
-         "8ec0bebd3b2ae52f81c79681432598b8cceaae1e",
-         []
-        ],
-        "plugin-dnd-008.html": [
-         "017696e6079c3f001a853e4cb8161e104e14ce27",
-         []
-        ],
-        "plugin-dnd-009.html": [
-         "74761894d3260a9e705345168aedfd96e3317519",
-         []
-        ],
-        "plugin-dnd-010.html": [
-         "7ce900d8fd8427cc5e425efca7acbb00e7595b0d",
-         []
-        ],
-        "plugin-dnd-011.html": [
-         "e22c4eec224cea1e7b6e1b8c8cba147a9fef1819",
-         []
-        ],
-        "plugin-dnd-101.html": [
-         "5f28430aa8f3d2e819a487498e1ceef19e1049b9",
-         []
-        ],
-        "plugin-dnd-102.html": [
-         "79bb0dfd7e688436b759285ffc60dd1d291e9a27",
-         []
-        ],
-        "plugin-dnd-103.html": [
-         "3166b054f518a618023409726ae4ef2f294eeaa4",
-         []
-        ],
-        "plugin-dnd-104.html": [
-         "53128eeb4b30ca99c0fe35745fa1c4463c6b1da0",
-         []
-        ],
-        "plugin-dnd-105.html": [
-         "a146a4608dfa18aec7ca46e3f68f9bebc0c6ff98",
-         []
-        ],
-        "plugin-dnd-106.html": [
-         "4ee1923d2e485f13ee0a2e74abc5ef60218a162c",
-         []
-        ],
-        "plugin-dnd-107.html": [
-         "96dc126a26d6cdd546f22d7de4e18222366777fa",
-         []
-        ],
-        "plugin-dnd-108.html": [
-         "ba69dfedb30025159cf920dfb0a899ebc7c61020",
-         []
-        ],
-        "plugin-dnd-109.html": [
-         "8748d8745d428ddd07165dac7e027300ecdda153",
-         []
-        ],
-        "plugin-dnd-110.html": [
-         "fbf5b48fa4ae3525c112606062564ae1e0c97888",
-         []
-        ],
-        "plugin-dnd-111.html": [
-         "8687c74b121c304946afa58ad4754dd2baae2051",
-         []
-        ],
-        "plugin-dnd-203.html": [
-         "ed6048783bd94308fb5899abb4751455f6c6c87a",
-         []
-        ],
-        "plugin-dnd-204.html": [
-         "e11ce92f0a3cd70510028e3b25ca0e4d054f4a07",
-         []
-        ],
-        "plugin-dnd-205.html": [
-         "eaf3e188578e37a8a6a3b44fe878df129993d2a9",
-         []
-        ],
-        "plugin-dnd-206.html": [
-         "a39ab0bcbf9dd5bcf802306182f68fe23ee18cec",
-         []
-        ],
-        "plugin-dnd-207.html": [
-         "a9ddcba494af1cb128aa2732e1abfb61c9796940",
-         []
-        ],
-        "plugin-dnd-303.html": [
-         "91307e61600c0b569372e06026dd5584082120ad",
-         []
-        ],
-        "plugin-dnd-304.html": [
-         "d3d27ebb690bd89b02b47679b1dfe4c8b409784a",
-         []
-        ],
-        "plugin-dnd-305.html": [
-         "ed8561b9c3b5b9b398ea2082f835b2f1bfa59f51",
-         []
-        ],
-        "plugin-dnd-306.html": [
-         "8ea6001962476bafd2e3e1aa817621ffd72628f2",
-         []
-        ],
-        "plugin-dnd-307.html": [
-         "0e55a7b1bf4e407599ea5ab69b77cee9094ffc8c",
-         []
-        ],
-        "swfsources": {
-         "dragndrop.hx": [
-          "25fc51ef0d2b5f2d3cdd02b280e43ff94801ec84",
-          []
-         ],
-         "dragndrop.hxml": [
-          "71f2eb5b9c9a873833f7a64f188ea647cae58370",
-          []
-         ],
-         "mouseup.hx": [
-          "13a8757bd79bf20a3c90cf0b49fd96b938aedaf2",
-          []
-         ],
-         "mouseup.hxml": [
-          "d588590347fe575d8abade7e885cce47d4ea344f",
-          []
-         ]
-        }
-       },
        "plugindrop.html": [
         "c34e60c4a941d53cf1f368edc288cc9a781a2668",
         []
@@ -349607,6 +349482,16 @@
          []
         ]
        }
+      },
+      "the-popup-element": {
+       "popup-hidden-display-ref.tentative.html": [
+        "7f4ced38c511785382e7304004a6fac5fc9ff581",
+        []
+       ],
+       "popup-open-display-ref.tentative.html": [
+        "1b063444c3b9f0da6cf5ea4c0262d83d6dff0834",
+        []
+       ]
       }
      },
      "interfaces.js": [
@@ -359599,7 +359484,7 @@
      []
     ],
     "testharness.js": [
-     "11e31b133ddd20736119f216e0326f15dc82f691",
+     "3623aa4d57e6bdab1fcab1b235646331381df31e",
      []
     ],
     "testharness.js.headers": [
@@ -363971,7 +363856,7 @@
        []
       ],
       "safari-technology-preview.rb": [
-       "628c5f60914cffa26da7d26d2d9a0502e1be735f",
+       "7149e6b2f0fd2900e885dc80f1ed1d9ecbc118b0",
        []
       ],
       "system_info.yml": [
@@ -462408,6 +462293,15 @@
         null,
         {}
        ]
+      ],
+      "window-open-blank-from-different-initiator.html": [
+       "aa269fdf14ca00fe083f31a8f801ab996406860f",
+       [
+        null,
+        {
+         "timeout": "long"
+        }
+       ]
       ]
      },
      "the-window-object": {
@@ -492014,14 +491908,7 @@
       },
       "the-popup-element": {
        "popup-element-basic.tentative.html": [
-        "41fa7d4e7f1adefc790e2e39b3b1e1a450499516",
-        [
-         null,
-         {}
-        ]
-       ],
-       "popup-open.tentative.html": [
-        "d622b7d10538625d9db3858a933d7740e323986f",
+        "3be3fae9ac9a5bbccc6784a1efb87240574207b8",
         [
          null,
          {}
@@ -515619,7 +515506,7 @@
    },
    "raw-sockets": {
     "open-consume-activation.https.html": [
-     "f6dda4488bafef83fddb4af0e9958ae8a5892153",
+     "6cbf017712b197886fb2d8d620927ee03506f6d4",
      [
       null,
       {
@@ -546634,7 +546521,7 @@
      ]
     ],
     "request-video-frame-callback-webrtc.https.html": [
-     "ce5b5ad6be699a917b3dce5559cdbfa8e334127d",
+     "dcf97e4ca9105d7e29e579bdb632db554c525933",
      [
       null,
       {}
@@ -553763,7 +553650,7 @@
    },
    "webcodecs": {
     "audio-decoder.any.js": [
-     "a6367231b234a6e078bd96dc2e689ffb429593c6",
+     "17f5520d2c7bfd40d2949d96d452f3142c70f438",
      [
       "webcodecs/audio-decoder.any.html",
       {
@@ -553814,7 +553701,7 @@
      ]
     ],
     "video-decoder.any.js": [
-     "44e7375a78c013d0a9d0f60a33a04651473c48fb",
+     "48568c170fc6195d924ac2b14be85dff00d3709d",
      [
       "webcodecs/video-decoder.any.html",
       {
diff --git a/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini b/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
index f8e7e539aae..4a1e8110f6f 100644
--- a/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
+++ b/tests/wpt/metadata/css/css-transforms/transform-scale-hittest.html.ini
@@ -2,6 +2,3 @@
   [Hit test intersecting scaled box]
     expected: FAIL
 
-  [Hit test within unscaled box]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/css/cssom-view/matchMedia-display-none-iframe.html.ini b/tests/wpt/metadata/css/cssom-view/matchMedia-display-none-iframe.html.ini
deleted file mode 100644
index e6e1f29e274..00000000000
--- a/tests/wpt/metadata/css/cssom-view/matchMedia-display-none-iframe.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[matchMedia-display-none-iframe.html]
-  expected: ERROR
diff --git a/tests/wpt/metadata/css/selectors/selectors-dir-selector-auto-direction-change-001.html.ini b/tests/wpt/metadata/css/selectors/selectors-dir-selector-auto-direction-change-001.html.ini
new file mode 100644
index 00000000000..3139f117686
--- /dev/null
+++ b/tests/wpt/metadata/css/selectors/selectors-dir-selector-auto-direction-change-001.html.ini
@@ -0,0 +1,2 @@
+[selectors-dir-selector-auto-direction-change-001.html]
+  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 daf8630de14..bb136c2f686 100644
--- a/tests/wpt/metadata/fetch/content-type/response.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/response.window.js.ini
@@ -309,21 +309,30 @@
   [fetch(): separate response Content-Type: text/plain ]
     expected: NOTRUN
 
-  [<iframe>: separate response Content-Type: text/plain */*;charset=gbk]
-    expected: FAIL
-
   [<iframe>: separate response Content-Type: text/html */*]
     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
-
   [<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>: separate response Content-Type: text/html;" text/plain]
+    expected: FAIL
+
+  [<iframe>: separate response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html */*;charset=gbk]
+    expected: FAIL
+
+  [<iframe>: combined response Content-Type: text/html;" \\" 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..b4bec16ae8a 100644
--- a/tests/wpt/metadata/fetch/content-type/script.window.js.ini
+++ b/tests/wpt/metadata/fetch/content-type/script.window.js.ini
@@ -56,3 +56,9 @@
   [separate text/javascript x/x]
     expected: FAIL
 
+  [separate text/javascript;charset=windows-1252 error text/javascript]
+    expected: FAIL
+
+  [separate text/javascript; charset=windows-1252 text/javascript]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/fetch/cross-origin-resource-policy/image-loads.html.ini b/tests/wpt/metadata/fetch/cross-origin-resource-policy/image-loads.html.ini
new file mode 100644
index 00000000000..7d26a22aeb9
--- /dev/null
+++ b/tests/wpt/metadata/fetch/cross-origin-resource-policy/image-loads.html.ini
@@ -0,0 +1,2 @@
+[image-loads.html]
+  expected: TIMEOUT
diff --git a/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
new file mode 100644
index 00000000000..dc2e45516de
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/history/the-history-interface/traverse_the_history_5.html.ini
@@ -0,0 +1,4 @@
+[traverse_the_history_5.html]
+  [Multiple history traversals, last would be aborted]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/browsers/sandboxing/window-open-blank-from-different-initiator.html.ini b/tests/wpt/metadata/html/browsers/sandboxing/window-open-blank-from-different-initiator.html.ini
new file mode 100644
index 00000000000..7f957864586
--- /dev/null
+++ b/tests/wpt/metadata/html/browsers/sandboxing/window-open-blank-from-different-initiator.html.ini
@@ -0,0 +1,8 @@
+[window-open-blank-from-different-initiator.html]
+  expected: TIMEOUT
+  [No pending navigation]
+    expected: NOTRUN
+
+  [One pending navigation]
+    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 c757b400205..442db3cb549 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 +1,4 @@
 [embedded-opener-remove-frame.html]
-  expected: CRASH
   [opener and "removed" embedded documents]
     expected: FAIL
 
@@ -7,5 +6,5 @@
     expected: FAIL
 
   [opener of discarded auxiliary browsing context]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
index 2a166bb97b7..fc37df7e3fa 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-1.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_escaping-1.html]
   type: testharness
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
     expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
index cb0211f1d21..5f60c78e73c 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_escaping-3.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_escaping-3.html]
   type: testharness
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe escape the sandbox if\n       allow-popups-to-escape-sandbox is used]
-    expected: FAIL
+    expected: TIMEOUT
 
diff --git a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
index d43f38b40cd..45d8be1c898 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-2.html.ini
@@ -1,6 +1,6 @@
 [iframe_sandbox_popups_nonescaping-2.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-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
index 7d2b5231af2..f4f994c5d6f 100644
--- a/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
+++ b/tests/wpt/metadata/html/semantics/embedded-content/the-iframe-element/iframe_sandbox_popups_nonescaping-3.html.ini
@@ -1,5 +1,5 @@
 [iframe_sandbox_popups_nonescaping-3.html]
-  expected: CRASH
+  expected: TIMEOUT
   [Check that popups from a sandboxed iframe do not escape the sandbox]
-    expected: FAIL
+    expected: NOTRUN
 
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
deleted file mode 100644
index 9f416703229..00000000000
--- a/tests/wpt/metadata/html/semantics/forms/form-submission-0/form-double-submit-3.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[form-double-submit-3.html]
-  [<button> should have the same double-submit protection as <input type=submit>]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/semantics/forms/textfieldselection/select-event.html.ini b/tests/wpt/metadata/html/semantics/forms/textfieldselection/select-event.html.ini
index 395fd310c84..4db3c97cc62 100644
--- a/tests/wpt/metadata/html/semantics/forms/textfieldselection/select-event.html.ini
+++ b/tests/wpt/metadata/html/semantics/forms/textfieldselection/select-event.html.ini
@@ -1,13 +1,7 @@
 [select-event.html]
-  [input type url: setRangeText() a second time (must not fire select)]
-    expected: FAIL
-
   [textarea: selectionDirection a second time (must not fire select)]
     expected: FAIL
 
-  [input type password: setRangeText() a second time (must not fire select)]
-    expected: FAIL
-
   [input type search: setRangeText() a second time (must not fire select)]
     expected: FAIL
 
@@ -17,51 +11,18 @@
   [textarea: setSelectionRange() a second time (must not fire select)]
     expected: FAIL
 
-  [input type text: setSelectionRange out of range a second time (must not fire select)]
-    expected: FAIL
-
-  [input type password: selectionEnd a second time (must not fire select)]
-    expected: FAIL
-
-  [input type tel: selectionEnd out of range a second time (must not fire select)]
-    expected: FAIL
-
-  [input type password: selectionStart a second time (must not fire select)]
-    expected: FAIL
-
   [input type url: setSelectionRange() a second time (must not fire select)]
     expected: FAIL
 
-  [input type url: selectionEnd out of range a second time (must not fire select)]
-    expected: FAIL
-
   [input type password: selectionEnd out of range a second time (must not fire select)]
     expected: FAIL
 
-  [input type search: setSelectionRange out of range a second time (must not fire select)]
-    expected: FAIL
-
   [input type search: setSelectionRange() a second time (must not fire select)]
     expected: FAIL
 
-  [textarea: selectionStart a second time (must not fire select)]
-    expected: FAIL
-
-  [input type tel: selectionStart out of range a second time (must not fire select)]
-    expected: FAIL
-
   [input type tel: selectionDirection a second time (must not fire select)]
     expected: FAIL
 
-  [input type url: select() a second time (must not fire select)]
-    expected: FAIL
-
-  [input type url: selectionDirection a second time (must not fire select)]
-    expected: FAIL
-
-  [input type search: selectionEnd out of range a second time (must not fire select)]
-    expected: FAIL
-
   [input type search: selectionDirection a second time (must not fire select)]
     expected: FAIL
 
@@ -77,3 +38,33 @@
   [input type url: selectionStart a second time (must not fire select)]
     expected: FAIL
 
+  [input type password: select() a second time (must not fire select)]
+    expected: FAIL
+
+  [input type text: setSelectionRange() a second time (must not fire select)]
+    expected: FAIL
+
+  [input type url: selectionStart out of range a second time (must not fire select)]
+    expected: FAIL
+
+  [input type search: selectionStart out of range a second time (must not fire select)]
+    expected: FAIL
+
+  [input type tel: setSelectionRange() a second time (must not fire select)]
+    expected: FAIL
+
+  [input type text: selectionDirection a second time (must not fire select)]
+    expected: FAIL
+
+  [textarea: setSelectionRange out of range a second time (must not fire select)]
+    expected: FAIL
+
+  [input type text: setRangeText() a second time (must not fire select)]
+    expected: FAIL
+
+  [input type password: selectionDirection a second time (must not fire select)]
+    expected: FAIL
+
+  [input type url: setSelectionRange out of range a second time (must not fire select)]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html.ini b/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html.ini
index 18ff1b7eca3..1b8e42a9ef8 100644
--- a/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html.ini
+++ b/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html.ini
@@ -5,3 +5,9 @@
   [popup element basic show/hide behavior]
     expected: FAIL
 
+  [The only visibility control for <popup> is through .show() and .hide().]
+    expected: FAIL
+
+  [The IDL "open" content attribute must have no effect, and must not be reflected to the WebIDL.]
+    expected: FAIL
+
diff --git a/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html.ini b/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html.ini
new file mode 100644
index 00000000000..bc8691791da
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html.ini
@@ -0,0 +1,2 @@
+[popup-hidden-display.tentative.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html.ini b/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html.ini
new file mode 100644
index 00000000000..8d5d74ea19f
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html.ini
@@ -0,0 +1,2 @@
+[popup-open-display.tentative.html]
+  expected: FAIL
diff --git a/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-open.tentative.html.ini b/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-open.tentative.html.ini
deleted file mode 100644
index a6c854723ee..00000000000
--- a/tests/wpt/metadata/html/semantics/interactive-elements/the-popup-element/popup-open.tentative.html.ini
+++ /dev/null
@@ -1,7 +0,0 @@
-[popup-open.tentative.html]
-  [On setting, the content open attribute must be removed if the IDL open attribute is set to false, and must be present if the IDL open attribute is set to true.]
-    expected: FAIL
-
-  [The IDL open attribute must return true if the content open attribute is set, and false if it is absent.]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
deleted file mode 100644
index 59a54fe88e4..00000000000
--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-delayed.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[module-delayed.html]
-  [async document.write in a module]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini b/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
deleted file mode 100644
index fca4d908c89..00000000000
--- a/tests/wpt/metadata/html/webappapis/dynamic-markup-insertion/document-write/module-static-import-delayed.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[module-static-import-delayed.html]
-  [document.write in an imported module]
-    expected: FAIL
-
diff --git a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
index 5ddb9bfeff6..a1effd5f801 100644
--- a/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
+++ b/tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-job-queue/promise-job-entry.html.ini
@@ -1,10 +1,9 @@
 [promise-job-entry.html]
-  expected: TIMEOUT
   [Fulfillment handler on fulfilled promise]
     expected: FAIL
 
   [Rejection handler on pending-then-rejected promise]
-    expected: TIMEOUT
+    expected: FAIL
 
   [Sanity check: this all works as expected with no promises involved]
     expected: FAIL
@@ -16,5 +15,5 @@
     expected: FAIL
 
   [Fulfillment handler on pending-then-fulfilled promise]
-    expected: TIMEOUT
+    expected: FAIL
 
diff --git a/tests/wpt/metadata/webmessaging/with-ports/017.html.ini b/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
deleted file mode 100644
index 064cf47545b..00000000000
--- a/tests/wpt/metadata/webmessaging/with-ports/017.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[017.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, about:blank]
-    expected: TIMEOUT
-
diff --git a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini b/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
deleted file mode 100644
index 663a1f8fa30..00000000000
--- a/tests/wpt/metadata/webmessaging/with-ports/018.html.ini
+++ /dev/null
@@ -1,5 +0,0 @@
-[018.html]
-  expected: TIMEOUT
-  [origin of the script that invoked the method, javascript:]
-    expected: TIMEOUT
-
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/content-security-policy/frame-src/frame-src-same-document.html.headers b/tests/wpt/web-platform-tests/content-security-policy/frame-src/frame-src-same-document.sub.html.headers
similarity index 100%
rename from tests/wpt/web-platform-tests/content-security-policy/frame-src/frame-src-same-document.html.headers
rename to tests/wpt/web-platform-tests/content-security-policy/frame-src/frame-src-same-document.sub.html.headers
diff --git a/tests/wpt/web-platform-tests/css/css-animations/nested-scale-animations-ref.html b/tests/wpt/web-platform-tests/css/css-animations/nested-scale-animations-ref.html
index 14b41366268..feef006417e 100644
--- a/tests/wpt/web-platform-tests/css/css-animations/nested-scale-animations-ref.html
+++ b/tests/wpt/web-platform-tests/css/css-animations/nested-scale-animations-ref.html
@@ -1,3 +1,4 @@
 <!DOCTYPE html>
-<div style="width: 200px; height: 100px; background: blue"></div>
-<div style="width: 200px; height: 100px; background: green"></div>
+<div style="width: 200px; height: 95px; background: blue"></div>
+<div style="height: 10px"></div>
+<div style="width: 200px; height: 95px; background: green"></div>
diff --git a/tests/wpt/web-platform-tests/css/css-animations/nested-scale-animations.html b/tests/wpt/web-platform-tests/css/css-animations/nested-scale-animations.html
index c96e555848f..ba2f96939fd 100644
--- a/tests/wpt/web-platform-tests/css/css-animations/nested-scale-animations.html
+++ b/tests/wpt/web-platform-tests/css/css-animations/nested-scale-animations.html
@@ -4,8 +4,6 @@
 <link rel="author" title="Xianzhu Wang" href="mailto:wangxianzhu@chromium.org">
 <link rel="help" href="https://crbug.com/1165408">
 <link rel="match" href="nested-scale-animations-ref.html">
-<!-- Allow blurry pixels in 2 rows. -->
-<meta name="fuzzy" content="0-255;0-400">
 <meta name="assert" content="Contents under nested scale animations should not be too blurry">
 <script src="/common/reftest-wait.js"></script>
 <style>
@@ -30,6 +28,9 @@
       <div style="width: 2px; height: 1px; background: green"></div>
     </div>
   </div>
+  <!-- To mask off the pixels that may be blurry/antialiased while the rendering
+       quality is acceptable. -->
+  <div style="position: absolute; top: 95px; left: 0; width: 200px; height: 10px; background: white"></div>
 </div>
 <script>
 takeScreenshotDelayed(200);
diff --git a/tests/wpt/web-platform-tests/css/selectors/selectors-dir-selector-auto-direction-change-001.html b/tests/wpt/web-platform-tests/css/selectors/selectors-dir-selector-auto-direction-change-001.html
new file mode 100644
index 00000000000..f6c6393b08a
--- /dev/null
+++ b/tests/wpt/web-platform-tests/css/selectors/selectors-dir-selector-auto-direction-change-001.html
@@ -0,0 +1,34 @@
+<!doctype html>
+<html>
+<head>
+    <title>CSS Selectors Level 4 Test: Check for correctly updating :dir=auto when the the directionality is changed in a display:none subtree </title>
+    <meta charset="utf8">
+    <link rel="author" title="Miyoung Shin" href="mailto:myid.shin@igalia.com">
+    <link rel="help" href="http://www.w3.org/TR/selectors4/#dir-pseudo">
+    <link rel="match" href="../reference/ref-filled-green-100px-square.xht">
+    <style>
+        #target {
+          width: 100px;
+          height: 100px;
+          background-color: red;
+        }
+        :dir(ltr) + #target {
+          background-color: green;
+        }
+    </style>
+</head>
+
+<body>
+    <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
+    <div dir="auto" style="display:none">
+        <div>
+          <div id="inner">رسمية</div>
+        </div>
+    </div>
+    <div id="target"></div>
+    <script>
+        inner.offsetTop;
+        inner.firstChild.data = "LTR";
+    </script>
+</body>
+</html>
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/counter-styles-3/support/test-common.css b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/counter-styles-3/support/test-common.css
index dcbf4e1e024..218dfcb7706 100644
--- a/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/counter-styles-3/support/test-common.css
+++ b/tests/wpt/web-platform-tests/css/vendor-imports/mozilla/mozilla-central-reftests/counter-styles-3/support/test-common.css
@@ -16,3 +16,7 @@ li, p {
 p {
   padding-right: .5em;
 }
+li::marker {
+  /* Blink workaround of https://bugzilla.mozilla.org/show_bug.cgi?id=1688769 */
+  white-space: pre;
+}
diff --git a/tests/wpt/web-platform-tests/font-access/resources/test-expectations.js b/tests/wpt/web-platform-tests/font-access/resources/test-expectations.js
index cc9b4ca3d12..844eb92f95e 100644
--- a/tests/wpt/web-platform-tests/font-access/resources/test-expectations.js
+++ b/tests/wpt/web-platform-tests/font-access/resources/test-expectations.js
@@ -14,37 +14,54 @@ const MAC_FONTS = [
     postscriptName: 'Monaco',
     fullName: 'Monaco',
     family: 'Monaco',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
       // Tables related to TrueType.
-      'cvt ', 'glyf', 'loca', 'prep', 'gasp',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
+      'gasp',
     ],
   },
   {
     postscriptName: 'Menlo-Regular',
     fullName: 'Menlo Regular',
     family: 'Menlo',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.medium,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   {
     postscriptName: 'Menlo-Bold',
     fullName: 'Menlo Bold',
     family: 'Menlo',
+    style: 'Bold',
     label: TEST_SIZE_CATEGORY.medium,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   {
     postscriptName: 'Menlo-BoldItalic',
     fullName: 'Menlo Bold Italic',
     family: 'Menlo',
+    style: 'Bold Italic',
     label: TEST_SIZE_CATEGORY.medium,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   // Indic.
@@ -52,36 +69,52 @@ const MAC_FONTS = [
     postscriptName: 'GujaratiMT',
     fullName: 'Gujarati MT',
     family: 'Gujarati MT',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   {
     postscriptName: 'GujaratiMT-Bold',
     fullName: 'Gujarati MT Bold',
     family: 'Gujarati MT',
+    style: 'Bold',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   {
     postscriptName: 'DevanagariMT',
     fullName: 'Devanagari MT',
     family: 'Devanagari MT',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   {
     postscriptName: 'DevanagariMT-Bold',
     fullName: 'Devanagari MT Bold',
     family: 'Devanagari MT',
+    style: 'Bold',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   // Japanese.
@@ -89,18 +122,22 @@ const MAC_FONTS = [
     postscriptName: 'HiraMinProN-W3',
     fullName: 'Hiragino Mincho ProN W3',
     family: 'Hiragino Mincho ProN',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.medium,
     expectedTables: [
-      'CFF ', 'VORG',
+      'CFF ',
+      'VORG',
     ],
   },
   {
     postscriptName: 'HiraMinProN-W6',
     fullName: 'Hiragino Mincho ProN W6',
     family: 'Hiragino Mincho ProN',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.medium,
     expectedTables: [
-      'CFF ', 'VORG',
+      'CFF ',
+      'VORG',
     ],
   },
   // Korean.
@@ -108,18 +145,24 @@ const MAC_FONTS = [
     postscriptName: 'AppleGothic',
     fullName: 'AppleGothic Regular',
     family: 'AppleGothic',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.medium,
     expectedTables: [
-      'cvt ', 'glyf', 'loca',
+      'cvt ',
+      'glyf',
+      'loca',
     ],
   },
   {
     postscriptName: 'AppleMyungjo',
     fullName: 'AppleMyungjo Regular',
     family: 'AppleMyungjo',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.medium,
     expectedTables: [
-      'cvt ', 'glyf', 'loca',
+      'cvt ',
+      'glyf',
+      'loca',
     ],
   },
   // Chinese.
@@ -127,18 +170,26 @@ const MAC_FONTS = [
     postscriptName: 'STHeitiTC-Light',
     fullName: 'Heiti TC Light',
     family: 'Heiti TC',
+    style: 'Light',
     label: TEST_SIZE_CATEGORY.large,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   {
-   postscriptName: 'STHeitiTC-Medium',
+    postscriptName: 'STHeitiTC-Medium',
     fullName: 'Heiti TC Medium',
     family: 'Heiti TC',
+    style: 'Medium',
     label: TEST_SIZE_CATEGORY.large,
     expectedTables: [
-      'cvt ', 'glyf', 'loca', 'prep',
+      'cvt ',
+      'glyf',
+      'loca',
+      'prep',
     ],
   },
   // Bitmap.
@@ -146,9 +197,11 @@ const MAC_FONTS = [
     postscriptName: 'AppleColorEmoji',
     fullName: 'Apple Color Emoji',
     family: 'Apple Color Emoji',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.large,
     expectedTables: [
-      'glyf', 'loca',
+      'glyf',
+      'loca',
       // Tables related to Bitmap Glyphs.
       'sbix',
     ],
@@ -160,6 +213,7 @@ const WIN_FONTS = [
     postscriptName: 'Verdana',
     fullName: 'Verdana',
     family: 'Verdana',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
       // Tables related to TrueType.
@@ -174,6 +228,7 @@ const WIN_FONTS = [
     postscriptName: 'Verdana-Bold',
     fullName: 'Verdana Bold',
     family: 'Verdana',
+    style: 'Bold',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
       // Tables related to TrueType.
@@ -188,6 +243,7 @@ const WIN_FONTS = [
     postscriptName: 'Verdana-Italic',
     fullName: 'Verdana Italic',
     family: 'Verdana',
+    style: 'Italic',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
       // Tables related to TrueType.
@@ -203,6 +259,7 @@ const WIN_FONTS = [
     postscriptName: 'MalgunGothicBold',
     fullName: 'Malgun Gothic Bold',
     family: 'Malgun Gothic',
+    style: 'Bold',
     label: TEST_SIZE_CATEGORY.medium,
     expectedTables: [
       // Tables related to TrueType.
@@ -218,12 +275,14 @@ const WIN_FONTS = [
     postscriptName: 'MicrosoftYaHei',
     fullName: 'Microsoft YaHei',
     family: 'Microsoft YaHei',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.medium,
   },
   {
     postscriptName: 'MicrosoftYaHei-Bold',
     fullName: 'Microsoft YaHei Bold',
     family: 'Microsoft YaHei',
+    style: 'Bold',
     label: TEST_SIZE_CATEGORY.medium,
   },
 ];
@@ -233,6 +292,7 @@ const LINUX_FONTS = [
     postscriptName: 'Ahem',
     fullName: 'Ahem',
     family: 'Ahem',
+    style: 'Regular',
     label: TEST_SIZE_CATEGORY.small,
     expectedTables: [
       // Tables related to TrueType.
@@ -330,17 +390,20 @@ function assert_fonts_exist(availableFonts, expectedFonts) {
   const postscriptNameSet = new Set();
   const fullNameSet = new Set();
   const familySet = new Set();
+  const styleSet = new Set();
 
   for (const f of expectedFonts) {
     postscriptNameSet.add(f.postscriptName);
     fullNameSet.add(f.fullName);
     familySet.add(f.family);
+    styleSet.add(f.style);
   }
 
   for (const f of availableFonts) {
     postscriptNameSet.delete(f.postscriptName);
     fullNameSet.delete(f.fullName);
     familySet.delete(f.family);
+    styleSet.delete(f.style);
   }
 
   assert_equals(postscriptNameSet.size, 0,
@@ -349,6 +412,7 @@ function assert_fonts_exist(availableFonts, expectedFonts) {
               `Missing Full names: ${setToString(fullNameSet)}.`);
   assert_equals(familySet.size, 0,
               `Missing Families: ${setToString(familySet)}.`);
+  assert_equals(styleSet.size, 0, `Missing Styles: ${setToString(styleSet)}.`);
 }
 
 function assert_postscript_name_exists(
diff --git a/tests/wpt/web-platform-tests/html/browsers/sandboxing/resources/204-no-content.asis b/tests/wpt/web-platform-tests/html/browsers/sandboxing/resources/204-no-content.asis
new file mode 100644
index 00000000000..58e46abbc9e
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/sandboxing/resources/204-no-content.asis
@@ -0,0 +1 @@
+HTTP/1.1 204 No Content
diff --git a/tests/wpt/web-platform-tests/html/browsers/sandboxing/resources/executor.html b/tests/wpt/web-platform-tests/html/browsers/sandboxing/resources/executor.html
new file mode 100644
index 00000000000..89bd268f9c7
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/sandboxing/resources/executor.html
@@ -0,0 +1,5 @@
+<script>
+  // Execute arbitrary code from somewhere else, via postMessage.
+  window.addEventListener("message", event => eval(event.data));
+  window.opener.postMessage("ready", "*");
+</script>
diff --git a/tests/wpt/web-platform-tests/html/browsers/sandboxing/window-open-blank-from-different-initiator.html b/tests/wpt/web-platform-tests/html/browsers/sandboxing/window-open-blank-from-different-initiator.html
new file mode 100644
index 00000000000..aa269fdf14c
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/browsers/sandboxing/window-open-blank-from-different-initiator.html
@@ -0,0 +1,91 @@
+<meta name="timeout" content="long">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/common/get-host-info.sub.js"></script>
+<script src="/common/utils.js"></script>
+<script>
+
+// This is a regression test for https://crbug.com/1170038.
+//
+// A document creates a popup and makes it navigate elsewhere. The navigation
+// will never commit. The popup has not completed any real load outside of the
+// initial empty document. Then from a different window with a different CSP
+// policy, make it navigate to about:blank.
+//
+// Web browser behavior might change depending on whether a pending navigation
+// exists for in the popup or not. Both are tested here.
+
+const same_origin = get_host_info().HTTP_ORIGIN;
+
+// Return a promise, resolving when |element| triggers |event_name| event.
+const future = (element, event_name) => {
+  return new Promise(resolve => element.addEventListener(event_name, resolve));
+};
+
+// `createNewPopup` is a function returning a new window that has not committed
+// any real load in its frame, outside of the initial empty document. The two
+// tests below vary depending on whether there is a pending navigation in the
+// frame or not.
+const runTest = (description, createNewPopup) => {
+  promise_test(async test => {
+    // Open a same-origin window with a different CSP.
+    const executor_path =
+      "/html/browsers/sandboxing/resources/executor.html?pipe=";
+    const csp = "|header(Content-Security-Policy, " +
+                "sandbox" +
+                " allow-scripts" +
+                " allow-popups" +
+                " allow-same-origin" +
+                " allow-popups-to-escape-sandbox";
+    const executor = window.open(same_origin + executor_path + csp);
+    const executor_reply = await future(window, "message");
+    assert_equals(executor_reply.data, "ready");
+
+    const popup_name = token();
+    const popup = await createNewPopup(test, popup_name);
+
+    // Request the first real load from a DIFFERENT window with different CSPs.
+    const first_real_load = future(popup, "load");
+    executor.postMessage(`window.open("about:blank", "${popup_name}");`);
+    await first_real_load;
+
+    // The new blank document in the popup must inherit CSPs from |executor|:
+    let is_sandboxed = future(window, "message");
+    popup.document.write(`
+      <script>
+        try {
+          document.domain = document.domain;
+          opener.opener.postMessage("not sandboxed", "*");
+        } catch (error) {
+          opener.opener.postMessage("sandboxed", "*");
+        }
+      </scr`+`ipt>
+    `);
+    assert_equals((await is_sandboxed).data, "sandboxed");
+  }, description);
+}
+
+// Open a new window and start loading from an unresponsive server. The frame
+// will be left with the initial empty document and a pending navigation.
+runTest("One pending navigation", async (test, popup_name) => {
+  const unresponsive_path =
+    "/fetch/api/resources/infinite-slow-response.py";
+  return window.open(same_origin + unresponsive_path, popup_name);
+});
+
+// Open a new window and start loading. The response is a 204 and the navigation
+// is canceled. As a result, the frame will be left with the initial empty
+// document and NO pending navigation.
+runTest("No pending navigation", async (test, popup_name) => {
+  const no_content_path =
+    "/html/browsers/sandboxing/resources/204-no-content.asis";
+  const popup = window.open(same_origin + no_content_path, popup_name);
+
+  // Unfortunately, there are no web API to detect a navigation has been
+  // canceled. Waiting using setTimeout is the only possible way to wait for it.
+  await new Promise(r => test.step_timeout(r, 1000));
+
+  return popup;
+});
+
+</script>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/click-to-activate.js b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/click-to-activate.js
deleted file mode 100644
index 2ea2f19c2c9..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/click-to-activate.js
+++ /dev/null
@@ -1 +0,0 @@
-document.write(plugincode);
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/dragndrop.swf b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/dragndrop.swf
deleted file mode 100644
index 6b49d46c5f2..00000000000
Binary files a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/dragndrop.swf and /dev/null differ
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/dragndropleavedeactivate.swf b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/dragndropleavedeactivate.swf
deleted file mode 100644
index be486248d13..00000000000
Binary files a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/dragndropleavedeactivate.swf and /dev/null differ
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-001.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-001.html
deleted file mode 100644
index 96a50200441..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-001.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop in Flash</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <p>Drag the orange square onto the blue square and release it. The orange square should disappear, and the blue square should turn yellow.</p>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-002.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-002.html
deleted file mode 100644
index 2958458e7ea..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-002.html
+++ /dev/null
@@ -1,39 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop alternating between Flash and page</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square onto the blue square and release it. The drag placeholder should disappear (either when releasing, or when passing the black square), and the mouse cursor should return to normal.</li>
-      <li>Without moving your mouse outside the black square, drag the orange square onto the blue square and release it. The orange square should disappear, and the blue square should turn yellow. Fail if the orange square does not immediately respond to the drag attempt.</li>
-      <li>Drag the pink square onto the yellow square and release it. The drag placeholder should disappear, and the mouse cursor should return to normal. Fail if the pink square does not immediately respond to the drag attempt.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-003.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-003.html
deleted file mode 100644
index 592192124ff..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-003.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Incomplete drag and drop in Flash</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <!-- Test is based on expected behaviour where the mouseup is sent to the plugin because a drag was in operation. -->
-    <p>Drag the orange square until the mouse is outside the black square, then release it. Move the mouse over the blue square. Fail if the orange square continues to follow the mouse.</p>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-004.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-004.html
deleted file mode 100644
index a4e776be74e..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-004.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop alternating between incompleted Flash drag and page</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the orange square until the mouse is outside the right side of the black square but the edge of the orange square can still be seen, then release it.</li>
-      <li>Without passing over the black square again, move the mouse to the pink square.</li>
-      <li>Drag the pink square onto the blue square and release it. The drag placeholder should disappear (either when releasing, or when passing the black square), and the mouse cursor should return to normal. Fail if the pink square does not immediately respond to the drag attempt.</li>
-      <li>Without passing over the black square again, move the mouse to the orange square. Fail if the orange square moves.</li>
-      <li>Drag the orange square onto the blue square and release it. The orange square should disappear, and the blue square should turn yellow. Fail if the orange square does not immediately respond to the drag attempt.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-005.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-005.html
deleted file mode 100644
index 67035acc71a..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-005.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop in Flash with Alt+Tab</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the orange square over the blue square.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>Move the mouse around inside the black square. The orange square should continue to follow the mouse.</li>
-    </ol>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-006.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-006.html
deleted file mode 100644
index 5322edd7d66..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-006.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop in Flash with Alt+Tab over page</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the orange square around until the mouse is outside the black square.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>Move the mouse inside the black square. The orange square should continue to follow the mouse.</li>
-    </ol>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-007.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-007.html
deleted file mode 100644
index 8ec0bebd3b2..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-007.html
+++ /dev/null
@@ -1,42 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with Alt+Tab over Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the pink square over the blue square. The mouse cursor should be the no-drop cursor, or the platform's drop-allowed cursor.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>The mouse cursor should be the same cursor as in step 2.</li>
-      <li>Move the mouse outside the black square. The drag placeholder should follow the mouse (reappearing if it disappeared in step 2).</li>
-      <li>Release the drag. The drag placeholder should disappear, and the cursor should revert to the default mouse cursor.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-008.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-008.html
deleted file mode 100644
index 017696e6079..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-008.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with right click over Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square over the blue square.</li>
-      <li>Without releasing the drag, click the right mouse button.</li>
-      <li>If the platform's normal behaviour is to cancel a drag (eg. Windows and Unix+KDE), then the drag should be cancelled; moving the mouse outside the black square should not cause the drag placeholder to continue following the mouse, and the mouse cursor should revert to default.</li>
-      <li>If the platform's normal behaviour is not to cancel a drag (eg. Mac and Unix+Gnome), then the drag should not be cancelled; moving the mouse outside the black square should cause the drag placeholder to continue following the mouse, and the mouse cursor should show as no-drop or drop-allowed.</li>
-      <li>Fail in either case if the drag placeholder gets stuck temporarily or permanently over the blue square. Fail if an inappropriate right click function begins (eg. context menu opens).</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-009.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-009.html
deleted file mode 100644
index 74761894d32..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-009.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with right click and release over Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square over the blue square.</li>
-      <li>Without releasing the drag, click the right mouse button, then release the drag.</li>
-      <li>Fail if the drag placeholder gets stuck over the blue square.</li>
-      <li>Move the mouse outside the black square. The mouse cursor should be the default mouse cursor.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-010.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-010.html
deleted file mode 100644
index 7ce900d8fd8..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-010.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with middle click over Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square over the blue square.</li>
-      <li>Without releasing the drag, click the middle mouse button.</li>
-      <li>If the platform's normal behaviour is to cancel a drag (eg. Windows and Unix+KDE), then the drag should be cancelled; moving the mouse outside the black square should not cause the drag placeholder to continue following the mouse, and the mouse cursor should revert to default.</li>
-      <li>If the platform's normal behaviour is not to cancel a drag (eg. Mac and Unix+Gnome), then the drag should not be cancelled; moving the mouse outside the black square should cause the drag placeholder to continue following the mouse, and the mouse cursor should show as no-drop or drop-allowed.</li>
-      <li>Fail in either case if the drag placeholder gets stuck temporarily or permanently over the blue square. Fail if an inappropriate middle click function begins (eg. paste-and-go).</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-011.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-011.html
deleted file mode 100644
index e22c4eec224..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-011.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with middle click and release over Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square over the blue square.</li>
-      <li>Without releasing the drag, click the middle mouse button, then release the drag.</li>
-      <li>Fail if the drag placeholder gets stuck over the blue square.</li>
-      <li>Move the mouse outside the black square. The mouse cursor should be the default mouse cursor.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-101.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-101.html
deleted file mode 100644
index 5f28430aa8f..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-101.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop in windowless Flash</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <p>Drag the orange square onto the blue square and release it. The orange square should disappear, and the blue square should turn yellow.</p>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-102.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-102.html
deleted file mode 100644
index 79bb0dfd7e6..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-102.html
+++ /dev/null
@@ -1,39 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop alternating between windowless Flash and page</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square onto the blue square and release it. The drag placeholder should disappear (either when releasing, or when passing the black square), and the mouse cursor should return to normal.</li>
-      <li>Without moving your mouse outside the black square, drag the orange square onto the blue square and release it. The orange square should disappear, and the blue square should turn yellow. Fail if the orange square does not immediately respond to the drag attempt.</li>
-      <li>Drag the pink square onto the yellow square and release it. The drag placeholder should disappear, and the mouse cursor should return to normal. Fail if the pink square does not immediately respond to the drag attempt.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-103.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-103.html
deleted file mode 100644
index 3166b054f51..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-103.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Incomplete drag and drop in windowless Flash</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <!-- Test is based on expected behaviour of windowless plugin where the mouseup is not sent to the plugin even though a drag was in operation. -->
-    <p>Drag the orange square until the mouse is outside the black square, then release it. Move the mouse over the blue square. Pass if the orange square follows the mouse.</p>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-104.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-104.html
deleted file mode 100644
index 53128eeb4b3..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-104.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop alternating between incompleted windowless Flash drag and page</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the orange square until the mouse is outside the right side of the black square but the edge of the orange square can still be seen, then release it.</li>
-      <li>Without passing over the black square again, move the mouse to the pink square.</li>
-      <li>Drag the pink square onto the white area inside the black square and release it. The drag placeholder should disappear (either when releasing, or when passing the black square), and the mouse cursor should return to normal. The orange square should jump to the mouse position. Fail if the pink square does not immediately respond to the drag attempt.</li>
-      <li>The orange square may optionally continue to follow the mouse.</li>
-      <!-- There are no rules here. Browsers may mask the mouseup event from the plugin (since a dnd operation was in progress), or they may pass the mouseup to the plugin (since the dnd operation has completed). -->
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-105.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-105.html
deleted file mode 100644
index a146a4608df..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-105.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop in windowless Flash with Alt+Tab</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the orange square over the blue square.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>Move the mouse around inside the black square. The orange square should continue to follow the mouse.</li>
-    </ol>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-106.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-106.html
deleted file mode 100644
index 4ee1923d2e4..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-106.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop in windowless Flash with Alt+Tab over page</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the orange square around until the mouse is outside the black square.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>Move the mouse inside the black square. The orange square should continue to follow the mouse.</li>
-    </ol>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-107.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-107.html
deleted file mode 100644
index 96dc126a26d..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-107.html
+++ /dev/null
@@ -1,43 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with Alt+Tab over windowless Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <p><strong>Note:</strong> Mac has no no-drop cursor.</p>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the pink square over the blue square. The mouse cursor should be the no-drop cursor, or the platform's drop-allowed cursor.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>The mouse cursor should be the same cursor as in step 2.</li>
-      <li>Move the mouse outside the black square. The drag placeholder should follow the mouse (reappearing if it disappeared in step 2).</li>
-      <li>Release the drag. The drag placeholder should disappear, and the cursor should revert to the default mouse cursor.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-108.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-108.html
deleted file mode 100644
index ba69dfedb30..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-108.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with right click over windowless Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square over the blue square.</li>
-      <li>Without releasing the drag, click the right mouse button.</li>
-      <li>If the platform's normal behaviour is to cancel a drag (eg. Windows and Unix+KDE), then the drag should be cancelled; moving the mouse outside the black square should not cause the drag placeholder to continue following the mouse, and the mouse cursor should revert to default.</li>
-      <li>If the platform's normal behaviour is not to cancel a drag (eg. Mac and Unix+Gnome), then the drag should not be cancelled; moving the mouse outside the black square should cause the drag placeholder to continue following the mouse, and the mouse cursor should show as no-drop or drop-allowed.</li>
-      <li>Fail in either case if the drag placeholder gets stuck temporarily or permanently over the blue square. Fail if an inappropriate right click function begins (eg. context menu opens).</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-109.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-109.html
deleted file mode 100644
index 8748d8745d4..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-109.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with right click and release over windowless Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square over the blue square.</li>
-      <li>Without releasing the drag, click the right mouse button, then release the drag.</li>
-      <li>Fail if the drag placeholder gets stuck over the blue square.</li>
-      <li>Move the mouse outside the black square. The mouse cursor should be the default mouse cursor.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-110.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-110.html
deleted file mode 100644
index fbf5b48fa4a..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-110.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with middle click over windowless Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square over the blue square.</li>
-      <li>Without releasing the drag, click the middle mouse button.</li>
-      <li>If the platform's normal behaviour is to cancel a drag (eg. Windows and Unix+KDE), then the drag should be cancelled; moving the mouse outside the black square should not cause the drag placeholder to continue following the mouse, and the mouse cursor should revert to default.</li>
-      <li>If the platform's normal behaviour is not to cancel a drag (eg. Mac and Unix+Gnome), then the drag should not be cancelled; moving the mouse outside the black square should cause the drag placeholder to continue following the mouse, and the mouse cursor should show as no-drop or drop-allowed.</li>
-      <li>Fail in either case if the drag placeholder gets stuck temporarily or permanently over the blue square. Fail if an inappropriate middle click function begins (eg. paste-and-go).</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-111.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-111.html
deleted file mode 100644
index 8687c74b121..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-111.html
+++ /dev/null
@@ -1,40 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with middle click and release over windowless Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the pink square over the blue square.</li>
-      <li>Without releasing the drag, click the middle mouse button, then release the drag.</li>
-      <li>Fail if the drag placeholder gets stuck over the blue square.</li>
-      <li>Move the mouse outside the black square. The mouse cursor should be the default mouse cursor.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndrop.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-203.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-203.html
deleted file mode 100644
index ed6048783bd..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-203.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Incomplete drag and drop with deactivate in Flash</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <!-- Test is based on expected behaviour where the mouseup is sent to the plugin because a drag was in operation. -->
-    <p>Drag the orange square until the mouse is outside the black square, then release it. Move the mouse over the blue square. Fail if the orange square continues to follow the mouse.</p>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-204.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-204.html
deleted file mode 100644
index e11ce92f0a3..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-204.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with deactivate alternating between incompleted Flash drag and page</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the orange square until the mouse is outside the right side of the black square but the edge of the orange square can still be seen, then release it.</li>
-      <li>Without passing over the black square again, move the mouse to the pink square.</li>
-      <li>Drag the pink square onto the blue square and release it. The drag placeholder should disappear (either when releasing, or when passing the black square), and the mouse cursor should return to normal. Fail if the pink square does not immediately respond to the drag attempt.</li>
-      <li>Without passing over the black square again, move the mouse to the orange square. Fail if the orange square moves.</li>
-      <li>Drag the orange square onto the blue square and release it. The orange square should disappear, and the blue square should turn yellow. Fail if the orange square does not immediately respond to the drag attempt.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-205.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-205.html
deleted file mode 100644
index eaf3e188578..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-205.html
+++ /dev/null
@@ -1,27 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with deactivate in Flash with Alt+Tab</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the orange square over the blue square.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>Move the mouse around inside the black square. The orange square should not follow the mouse.</li>
-      <li>Release the mouse button over the white area inside the black square. The orange square should disappear, and the blue square should turn yellow.</li>
-    </ol>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-206.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-206.html
deleted file mode 100644
index a39ab0bcbf9..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-206.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with deactivate in Flash with Alt+Tab over page</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the orange square around until the mouse is outside the black square.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>Move the mouse over the blue square. The orange square should not continue to follow the mouse.</li>
-    </ol>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-207.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-207.html
deleted file mode 100644
index a9ddcba494a..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-207.html
+++ /dev/null
@@ -1,43 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with deactivate with Alt+Tab over Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <p><strong>Note:</strong> Mac has no no-drop cursor.</p>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the pink square over the blue square. The mouse cursor should be the no-drop cursor, or the platform's drop-allowed cursor.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>The mouse cursor should be the same cursor as in step 2.</li>
-      <li>Move the mouse outside the black square. The drag placeholder should follow the mouse (reappearing if it disappeared in step 2).</li>
-      <li>Release the drag. The drag placeholder should disappear, and the cursor should revert to the default mouse cursor.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-303.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-303.html
deleted file mode 100644
index 91307e61600..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-303.html
+++ /dev/null
@@ -1,22 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Incomplete drag and drop with deactivate in windowless Flash</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <!-- Test is based on expected behaviour of windowless plugin where the mouseup is not sent to the plugin even though a drag was in operation. -->
-    <p>Drag the orange square until the mouse is outside the black square, then release it. Move the mouse over the blue square. Pass if the orange square follows the mouse.</p>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-304.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-304.html
deleted file mode 100644
index d3d27ebb690..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-304.html
+++ /dev/null
@@ -1,41 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with deactivate alternating between incompleted windowless Flash drag and page</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Drag the orange square until the mouse is outside the right side of the black square but the edge of the orange square can still be seen, then release it.</li>
-      <li>Without passing over the black square again, move the mouse to the pink square.</li>
-      <li>Drag the pink square onto the white area inside the black square and release it. The drag placeholder should disappear (either when releasing, or when passing the black square), and the mouse cursor should return to normal. The orange square should jump to the mouse position. Fail if the pink square does not immediately respond to the drag attempt.</li>
-      <li>The orange square may optionally continue to follow the mouse.</li>
-      <!-- There are no rules here. Browsers may mask the mouseup event from the plugin (since a dnd operation was in progress), or they may pass the mouseup to the plugin (since the dnd operation has completed). -->
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-305.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-305.html
deleted file mode 100644
index ed8561b9c3b..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-305.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with deactivate in windowless Flash with Alt+Tab</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the orange square over the blue square.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>Move the mouse around inside the black square. The orange square should continue to follow the mouse.</li>
-    </ol>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-306.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-306.html
deleted file mode 100644
index 8ea60019624..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-306.html
+++ /dev/null
@@ -1,26 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with deactivate in windowless Flash with Alt+Tab over page</title>
-    <style type="text/css">
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the orange square around until the mouse is outside the black square.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>Move the mouse inside the black square. The orange square should continue to follow the mouse.</li>
-    </ol>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-307.html b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-307.html
deleted file mode 100644
index 0e55a7b1bf4..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/plugin-dnd-307.html
+++ /dev/null
@@ -1,42 +0,0 @@
-<!DOCTYPE html>
-<html>
-  <head>
-    <title>Drag and drop with deactivate with Alt+Tab over windowless Flash</title>
-    <style type="text/css">
-div {
-  width: 100px;
-  height: 100px;
-  background: fuchsia;
-}
-object {
-  width: 400px;
-  height: 400px;
-  border: 5px solid black;
-}
-    </style>
-    <script type="text/javascript">
-window.onload = function () {
-  document.getElementsByTagName('div')[0].ondragstart = function (e) {
-    e.dataTransfer.effectAllowed = 'copy';
-    e.dataTransfer.setData('text','dummy text');
-  };
-};
-    </script>
-  </head>
-  <body>
-    <noscript><p>Enable JavaScript and reload</p></noscript>
-    <ol>
-      <li>Ensure at least one other program is running, with its window maximised.</li>
-      <li>Drag the pink square over the blue square. The mouse cursor should be the no-drop cursor, or the platform's drop-allowed cursor.</li>
-      <li>Without releasing the mouse button, use Alt+Tab (or your system's equivalent) to switch to the other program, then back to this one.</li>
-      <li>The mouse cursor should be the same cursor as in step 2.</li>
-      <li>Move the mouse outside the black square. The drag placeholder should follow the mouse (reappearing if it disappeared in step 2).</li>
-      <li>Release the drag. The drag placeholder should disappear, and the cursor should revert to the default mouse cursor.</li>
-    </ol>
-    <div draggable="true"></div>
-    <script type="text/javascript">
-var plugincode = '<object data="dragndropleavedeactivate.swf" type="application/x-shockwave-flash"><param name="wmode" value="opaque">Flash plugin is required for this test.</object>';
-    </script>
-    <script type="text/javascript" src="click-to-activate.js"></script>
-  </body>
-</html>
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/dragndrop.hx b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/dragndrop.hx
deleted file mode 100644
index 25fc51ef0d2..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/dragndrop.hx
+++ /dev/null
@@ -1,133 +0,0 @@
-import Std;
-import flash.Lib;
-import flash.events.MouseEvent;
-
-class DragNDrop
-{
-  static var s_box_draggable:Box;
-  static var s_box_target:Box;
-  static var s_dragging:Bool = false;
-
-  private static function main()
-  {
-    /* Blue box (target). */
-    s_box_target = new Box(0x0000ff, 100, 100, 150, 150);
-    /* Orange box (draggable). */
-    s_box_draggable = new Box(0xffa500, 25, 25, 50, 50);
-
-    flash.Lib.current.stage.addEventListener(MouseEvent.MOUSE_DOWN, OnMouseDown);
-    flash.Lib.current.stage.addEventListener(MouseEvent.MOUSE_MOVE, OnMouseMove);
-    flash.Lib.current.stage.addEventListener(MouseEvent.MOUSE_UP, OnMouseUp);
-  }
-
-  static function OnMouseDown(event:MouseEvent):Void
-  {
-    if (s_box_draggable.IsHit(event.stageX, event.stageY))
-      s_dragging = true;
-  }
-
-  static function OnMouseUp(event:MouseEvent):Void
-  {
-      s_dragging = false;
-
-      /* Check if passed. */
-      if (s_box_draggable.IsWithin(s_box_target))
-      {
-        s_box_draggable.Hide();
-        s_box_target.SetColor(0xffee00);
-      }
-  }
-
-  static function OnMouseMove(event:MouseEvent):Void
-  {
-    if (s_dragging)
-    {
-      ClearCanvas();
-      s_box_target.Redraw();
-      s_box_draggable.Move(event.stageX, event.stageY);
-    }
-  }
-
-  static function ClearCanvas():Void
-  {
-    var mc:flash.display.MovieClip = flash.Lib.current;
-    mc.graphics.beginFill(0xffffff);
-    mc.graphics.drawRect(0, 0, flash.Lib.current.stage.width, flash.Lib.current.stage.height);
-    mc.graphics.endFill();
-  }
-}
-
-class Box
-{
-  var m_mc:flash.display.MovieClip;
-  var m_color:Int;
-  var m_rel_x:Float;
-  var m_rel_y:Float;
-  var m_x:Float;
-  var m_y:Float;
-  var m_width:Int;
-  var m_height:Int;
-
-  public function new(color:Int, x:Int, y:Int, width:Int, height:Int)
-  {
-    m_mc = flash.Lib.current;
-    m_color = color;
-    m_x = x;
-    m_y = y;
-    m_width = width;
-    m_height = height;
-
-    Redraw();
-  }
-
-  public function IsHit(x:Float, y:Float):Bool
-  {
-    if ((x >= m_x && x <= m_x + m_width) && (y >= m_y && y <= m_y + m_height))
-    {
-      m_rel_x = x - m_x;
-      m_rel_y = y - m_y;
-      return true;
-    }
-
-    return false;
-  }
-
-  public function IsWithin(other:Box):Bool
-  {
-    return m_x >= other.m_x && m_x + m_width <= other.m_x + other.m_width
-           && m_y >= other.m_y && m_y + m_height <= other.m_y + other.m_height;
-  }
-
-  public function Hide():Void
-  {
-    m_width = 0;
-    m_height = 0;
-  }
-
-  public function SetColor(color:Int):Void
-  {
-    m_color = color;
-    Redraw();
-  }
-
-  public function Move(x:Float, y:Float):Void
-  {
-    /* Accounting for click offset. */
-    m_x = x - m_rel_x;
-    m_y = y - m_rel_y;
-    Draw(Std.int(m_x), Std.int(m_y), m_width, m_height);
-  }
-
-  public function Redraw():Void
-  {
-    Draw(Std.int(m_x), Std.int(m_y), m_width, m_height);
-  }
-
-  private function Draw(x:Int, y:Int, width:Int, height:Int)
-  {
-    /* Draw moved rect. */
-    m_mc.graphics.beginFill(m_color);
-    m_mc.graphics.drawRect(x, y, width, height);
-    m_mc.graphics.endFill();
-  }
-}
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/dragndrop.hxml b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/dragndrop.hxml
deleted file mode 100644
index 71f2eb5b9c9..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/dragndrop.hxml
+++ /dev/null
@@ -1 +0,0 @@
--swf dragndrop.swf
-swf-version 10
-main DragNDrop
-swf-header 300:300:25:FFFFFF
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/mouseup.hx b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/mouseup.hx
deleted file mode 100644
index 13a8757bd79..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/mouseup.hx
+++ /dev/null
@@ -1,34 +0,0 @@
-import flash.Lib;
-import flash.display.Sprite;
-import flash.events.MouseEvent;
-
-class MouseUp extends Sprite
-{
-  var s:Sprite;
-
-  static function main()
-  {
-    new MouseUp();
-  }
-
-  public function new()
-  {
-    super();
-    flash.Lib.current.addChild(this);
-
-    s = new Sprite();
-    s.graphics.beginFill(0xffa500);
-    s.graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
-    s.graphics.endFill();
-    stage.addChild(s);
-
-    stage.addEventListener(MouseEvent.MOUSE_UP, OnMouseUp);
-  }
-
-  function OnMouseUp(event:MouseEvent):Void
-  {
-    s.graphics.beginFill(0xffee00);
-    s.graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);
-    s.graphics.endFill();
-  }
-}
diff --git a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/mouseup.hxml b/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/mouseup.hxml
deleted file mode 100644
index d588590347f..00000000000
--- a/tests/wpt/web-platform-tests/html/editing/dnd/platform/plugin/swfsources/mouseup.hxml
+++ /dev/null
@@ -1 +0,0 @@
--swf mouseup.swf
-swf-version 10
-main MouseUp
-swf-header 300:300:25:FFFFFF
\ No newline at end of file
diff --git a/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html
index 41fa7d4e7f1..3be3fae9ac9 100644
--- a/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html
+++ b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-element-basic.tentative.html
@@ -5,22 +5,42 @@
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
 
-<popup id=popup>This is a popup</popup>
+<popup id=p1>This is a popup</popup>
+<popup id=p2 open>This is another popup, with an unused "open" attribute</popup>
 
 <script>
   test(function() {
     assert_true(document.createElement('popup') instanceof HTMLPopupElement);
   }, "popup element exists")
 
-  test(function() {
-    const popup = document.getElementById('popup');
-    assert_equals(window.getComputedStyle(popup).getPropertyValue('display'),'none');
-    assert_equals(popup.getAttribute('open'),null);
-    popup.show();
-    assert_equals(popup.getAttribute('open'),"");
-    assert_equals(window.getComputedStyle(popup).getPropertyValue('display'),'block');
-    popup.hide();
-    assert_equals(popup.getAttribute('open'),null);
-    assert_equals(window.getComputedStyle(popup).getPropertyValue('display'),'none');
-  }, "popup element basic show/hide behavior")
+  const popup1 = document.getElementById('p1');
+  const popup2 = document.getElementById('p2');
+
+  test(function(){
+    assert_false(popup1.open);
+    assert_false(popup2.open);
+    assert_equals(getComputedStyle(popup2).display,"none");
+  }, 'The IDL "open" content attribute must have no effect, and must not be reflected to the WebIDL.');
+
+  test(function(){
+    assert_false(popup1.open);
+    assert_false(popup1.hasAttribute("open"));
+    assert_equals(getComputedStyle(popup1).display,"none");
+    popup1.open = true; // Should have no effect
+    assert_false(popup1.open);
+    popup1.show();
+    assert_true(popup1.open);
+    assert_false(popup1.hasAttribute("open"));
+    assert_not_equals(getComputedStyle(popup1).display,"none");
+    popup1.open = false; // Should have no effect
+    assert_true(popup1.open);
+    popup1.hide();
+    assert_false(popup1.open);
+    assert_false(popup1.hasAttribute("open"));
+    assert_equals(getComputedStyle(popup1).display,"none");
+    popup1.setAttribute("open","");
+    assert_false(popup1.open,'Setting open attribute should not reflect to the WebIDL');
+    assert_true(popup1.hasAttribute("open"));
+    assert_equals(getComputedStyle(popup1).display,"none");
+  }, "The only visibility control for <popup> is through .show() and .hide().");
 </script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-hidden-display-ref.tentative.html b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-hidden-display-ref.tentative.html
new file mode 100644
index 00000000000..7f4ced38c51
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-hidden-display-ref.tentative.html
@@ -0,0 +1,5 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<link rel=author title="Mason Freed" href="mailto:masonfreed@chromium.org">
+
+No popup should be displayed here.<p>
diff --git a/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html
new file mode 100644
index 00000000000..c80aecf1d30
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-hidden-display.tentative.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<link rel=author title="Mason Freed" href="mailto:masonfreed@chromium.org">
+<link rel=help href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Popup/explainer.md">
+<link rel=match href="popup-hidden-display-ref.tentative.html">
+
+No popup should be displayed here.<p>
+
+<popup>This content should be hidden</popup>
+
+<style>
+  popup {
+    display: block; /* This should have no effect */
+    top: 0;
+    left: 0;
+    width: 300px;
+    height: 200px;
+    border: 1px solid;
+    background: white;
+    color: black;
+  }
+</style>
diff --git a/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open-display-ref.tentative.html b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open-display-ref.tentative.html
new file mode 100644
index 00000000000..1b063444c3b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open-display-ref.tentative.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<link rel=author title="Mason Freed" href="mailto:masonfreed@chromium.org">
+
+<div>This is a popup</div>
+
+<style>
+  div {
+    /* Per spec: */
+    display: block;
+    position: fixed;
+    top: 0;
+    left: 0;
+    /* Per settings in test file: */
+    width: fit-content;
+    height: fit-content;
+    border: 1px solid;
+    padding: 1em;
+    background: -internal-light-dark(white, black);
+    color: -internal-light-dark(black, white);
+  }
+</style>
diff --git a/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html
new file mode 100644
index 00000000000..0f6bd930212
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open-display.tentative.html
@@ -0,0 +1,22 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<link rel=author title="Mason Freed" href="mailto:masonfreed@chromium.org">
+<link rel=help href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Popup/explainer.md">
+<link rel=match href="popup-open-display-ref.tentative.html">
+
+<popup>This is a popup</popup>
+
+<style>
+  popup {
+    width: fit-content;
+    height: fit-content;
+    border: 1px solid;
+    padding: 1em;
+    background: white;
+    color: black;
+  }
+</style>
+
+<script>
+  document.querySelector('popup').show();
+</script>
diff --git a/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open.tentative.html b/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open.tentative.html
deleted file mode 100644
index d622b7d1053..00000000000
--- a/tests/wpt/web-platform-tests/html/semantics/interactive-elements/the-popup-element/popup-open.tentative.html
+++ /dev/null
@@ -1,29 +0,0 @@
-<!DOCTYPE html>
-<meta charset="utf-8">
-<link rel="author" title="Mason Freed" href="mailto:masonfreed@chromium.org">
-<link rel=help href="https://github.com/MicrosoftEdge/MSEdgeExplainers/blob/main/Popup/explainer.md">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-
-<popup id=p1>This is a closed popup</popup>
-<popup id=p2 open>This is an open popup</popup>
-
-<script>
-  var popup1 = document.getElementById('p1');
-  var popup2 = document.getElementById('p2');
-
-  test(function(){
-    assert_false(popup1.open);
-    assert_true(popup2.open);
-  }, "The IDL open attribute must return true if the content open attribute is set, and false if it is absent.");
-
-  test(function(){
-    assert_false(popup1.hasAttribute("open"));
-    popup1.open = true;
-    assert_true(popup1.hasAttribute("open"));
-    popup1.open = false;
-    assert_true(popup2.hasAttribute("open"));
-    popup2.open = false;
-    assert_false(popup2.hasAttribute("open"));
-  }, "On setting, the content open attribute must be removed if the IDL open attribute is set to false, and must be present if the IDL open attribute is set to true.");
-</script>
diff --git a/tests/wpt/web-platform-tests/raw-sockets/open-consume-activation.https.html b/tests/wpt/web-platform-tests/raw-sockets/open-consume-activation.https.html
index f6dda4488ba..6cbf017712b 100644
--- a/tests/wpt/web-platform-tests/raw-sockets/open-consume-activation.https.html
+++ b/tests/wpt/web-platform-tests/raw-sockets/open-consume-activation.https.html
@@ -12,7 +12,7 @@
     <script>
       'use strict';
 
-      const options = { remoteAddress: "127.0.0.1" };
+      const options = { remotePort: 53 };
 
       promise_test(async t => {
         // Not activated by user gesture, so not allowed!
@@ -21,12 +21,9 @@
 
         await test_driver.bless("open socket");
 
-        // We have a gesture, but remotePort is omitted - so TypeError!
-        await promise_rejects_js(
-          t,
-          TypeError,
-          navigator.openTCPSocket(options)
-        );
+        // We have a gesture, but remoteAddress is omitted - so not allowed!
+        await promise_rejects_dom(t, "NotAllowedError",
+          navigator.openTCPSocket(options));
 
         // The activation has been consumed, so calling openTCPSocket() again
         // would require a new gesture.
@@ -41,12 +38,9 @@
 
         await test_driver.bless("open socket");
 
-        // We have a gesture, but remotePort is omitted - so TypeError!
-        await promise_rejects_js(
-          t,
-          TypeError,
-          navigator.openUDPSocket(options)
-        );
+        // We have a gesture, but remoteAddress is omitted - so not allowed!
+        await promise_rejects_dom(t, "NotAllowedError",
+          navigator.openTCPSocket(options));
 
         // The activation has been consumed, so calling openUDPSocket() again
         // would require a new gesture.
diff --git a/tests/wpt/web-platform-tests/resources/testharness.js b/tests/wpt/web-platform-tests/resources/testharness.js
index 11e31b133dd..3623aa4d57e 100644
--- a/tests/wpt/web-platform-tests/resources/testharness.js
+++ b/tests/wpt/web-platform-tests/resources/testharness.js
@@ -2780,7 +2780,15 @@ policies and contribution forms [3].
 
         this.current_test = null;
         this.asserts_run = [];
-        this.output = settings.output;
+
+        // Track whether output is enabled, and thus whether or not we should
+        // track asserts.
+        //
+        // On workers we don't get properties set from testharnessreport.js, so
+        // we don't know whether or not to track asserts. To avoid the
+        // resulting performance hit, we assume we are not meant to. This means
+        // that assert tracking does not function on workers.
+        this.output = settings.output && 'document' in global_scope;
 
         this.status = new TestsStatus();
 
diff --git a/tests/wpt/web-platform-tests/tools/ci/azure/safari-technology-preview.rb b/tests/wpt/web-platform-tests/tools/ci/azure/safari-technology-preview.rb
index 628c5f60914..7149e6b2f0f 100644
--- a/tests/wpt/web-platform-tests/tools/ci/azure/safari-technology-preview.rb
+++ b/tests/wpt/web-platform-tests/tools/ci/azure/safari-technology-preview.rb
@@ -1,10 +1,10 @@
 cask "safari-technology-preview" do
   if MacOS.version <= :catalina
-    version "118,001-92142-20210105-a1c7713a-1f38-411e-85e3-c650a62d5c06"
-    sha256 "8ffd7f83166106992cfc65a9760efe61578b55e1d8a1c960d56867f2048bd953"
+    version "119,001-97793-20210126-7aa49ced-c2f2-415d-a564-6fab25fcb8e6"
+    sha256 "f5ca6acc23d65e23aaf0df5ff35fb3e28c9ae7a40e46331122d29a3e788ca2c1"
   else
-    version "118,001-92171-20210105-8d3c22a7-e518-4758-8df4-fe87c4fa078a"
-    sha256 "98c60037f4dace62ca78d5bc3ab6974c9ca078f60fe2a82062bbc8e3cbcfc55a"
+    version "119,001-98875-20210126-7699f76e-e3a5-4f45-80f9-8975c236d337"
+    sha256 "048e5ac1e761df757075134fa3d1f80ae7da56d5eef2511970aeac34f5ed0027"
   end
 
   url "https://secure-appldnld.apple.com/STP/#{version.after_comma}/SafariTechnologyPreview.dmg"
diff --git a/tests/wpt/web-platform-tests/video-rvfc/request-video-frame-callback-webrtc.https.html b/tests/wpt/web-platform-tests/video-rvfc/request-video-frame-callback-webrtc.https.html
index ce5b5ad6be6..dcf97e4ca91 100644
--- a/tests/wpt/web-platform-tests/video-rvfc/request-video-frame-callback-webrtc.https.html
+++ b/tests/wpt/web-platform-tests/video-rvfc/request-video-frame-callback-webrtc.https.html
@@ -54,6 +54,15 @@
     }
   }
 
+  var verify_local_metadata = (now, metadata) => {
+    assert_greater_than(metadata.expectedDisplayTime, 0);
+    assert_greater_than(metadata.presentedFrames, 0);
+    assert_greater_than(metadata.width, 0);
+    assert_greater_than(metadata.height, 0);
+    assert_true("captureTime" in metadata, "captureTime should always be present for local sources.");
+    assert_greater_than(metadata.captureTime, 0);
+  }
+
   // If the remote video gets video data that implies the negotiation
   // as well as the ICE and DTLS connection are up.
   document.getElementById('remote-view')
@@ -61,6 +70,11 @@
     document.getElementById('remote-view').requestVideoFrameCallback(test.step_func(verify_params));
   });
 
+  document.getElementById('local-view')
+      .addEventListener('loadmetadata', function() {
+    document.getElementById('local-view').requestVideoFrameCallback(test.step_func_done(verify_local_metadata));
+  });
+
 
   function getNoiseStreamOkCallback(localStream) {
     gFirstConnection = new RTCPeerConnection(null);
diff --git a/tests/wpt/web-platform-tests/webcodecs/audio-decoder.any.js b/tests/wpt/web-platform-tests/webcodecs/audio-decoder.any.js
index a6367231b23..17f5520d2c7 100644
--- a/tests/wpt/web-platform-tests/webcodecs/audio-decoder.any.js
+++ b/tests/wpt/web-platform-tests/webcodecs/audio-decoder.any.js
@@ -64,6 +64,44 @@ promise_test(t => {
   });
 }, 'Test AudioDecoder.isConfigSupported() with a valid config');
 
+promise_test(t => {
+  // Define a valid config that includes a hypothetical 'futureConfigFeature',
+  // which is not yet recognized by the User Agent.
+  const validConfig = {
+    codec: 'opus',
+    sampleRate: 48000,
+    numberOfChannels: 2,
+    // Opus header extradata.
+    description: new Uint8Array([0x4f, 0x70, 0x75, 0x73, 0x48, 0x65, 0x61, 0x64,
+        0x01, 0x02, 0x38, 0x01, 0x80, 0xbb, 0x00, 0x00, 0x00, 0x00, 0x00]),
+    futureConfigFeature: 'foo',
+  };
+
+  // The UA will evaluate validConfig as being "valid", ignoring the
+  // `futureConfigFeature` it  doesn't recognize.
+  return AudioDecoder.isConfigSupported(validConfig).then((decoderSupport) => {
+    // AudioDecoderSupport must contain the following properites.
+    assert_true(decoderSupport.hasOwnProperty('supported'));
+    assert_true(decoderSupport.hasOwnProperty('config'));
+
+    // AudioDecoderSupport.config must not contain unrecognized properties.
+    assert_false(decoderSupport.config.hasOwnProperty('futureConfigFeature'));
+
+    // AudioDecoderSupport.config must contiain the recognized properties.
+    assert_equals(decoderSupport.config.codec, validConfig.codec);
+    assert_equals(decoderSupport.config.sampleRate, validConfig.sampleRate);
+    assert_equals(decoderSupport.config.numberOfChannels, validConfig.numberOfChannels);
+
+    // The description BufferSource must copy the input config description.
+    assert_not_equals(decoderSupport.config.description, validConfig.description);
+    let parsedDescription = new Uint8Array(decoderSupport.config.description);
+    assert_equals(parsedDescription.length, validConfig.description.length);
+    for (let i = 0; i < parsedDescription.length; ++i) {
+      assert_equals(parsedDescription[i], validConfig.description[i]);
+    }
+  });
+}, 'Test that AudioDecoder.isConfigSupported() returns a parsed configuration');
+
 promise_test(t => {
   // AudioDecoderInit lacks required fields.
   assert_throws_js(TypeError, () => { new AudioDecoder({}); });
diff --git a/tests/wpt/web-platform-tests/webcodecs/video-decoder.any.js b/tests/wpt/web-platform-tests/webcodecs/video-decoder.any.js
index 44e7375a78c..48568c170fc 100644
--- a/tests/wpt/web-platform-tests/webcodecs/video-decoder.any.js
+++ b/tests/wpt/web-platform-tests/webcodecs/video-decoder.any.js
@@ -164,6 +164,54 @@ promise_test(t => {
   });
 }, 'Test VideoDecoder.isConfigSupported() with valid expanded config');
 
+promise_test(t => {
+  // Define a valid config that includes a hypothetical 'futureConfigFeature',
+  // which is not yet recognized by the User Agent.
+  const validConfig = {
+    codec: h264.codec,
+    codedWidth: 1920,
+    codedHeight: 1088,
+    cropLeft: 0,
+    cropTop: 0,
+    cropWidth: 1920,
+    cropHeight: 1080,
+    displayWidth: 1920,
+    displayHeight: 1080,
+    description: new Uint8Array([1, 2, 3]),
+    futureConfigFeature: 'foo',
+  };
+
+  // The UA will evaluate validConfig as being "valid", ignoring the
+  // `futureConfigFeature` it  doesn't recognize.
+  return VideoDecoder.isConfigSupported(validConfig).then((decoderSupport) => {
+    // VideoDecoderSupport must contain the following properites.
+    assert_true(decoderSupport.hasOwnProperty('supported'));
+    assert_true(decoderSupport.hasOwnProperty('config'));
+
+    // VideoDecoderSupport.config must not contain unrecognized properties.
+    assert_false(decoderSupport.config.hasOwnProperty('futureConfigFeature'));
+
+    // VideoDecoderSupport.config must contiain the recognized properties.
+    assert_equals(decoderSupport.config.codec, validConfig.codec);
+    assert_equals(decoderSupport.config.codedWidth, validConfig.codedWidth);
+    assert_equals(decoderSupport.config.codedHeight, validConfig.codedHeight);
+    assert_equals(decoderSupport.config.cropLeft, validConfig.cropLeft);
+    assert_equals(decoderSupport.config.cropTop, validConfig.cropTop);
+    assert_equals(decoderSupport.config.cropWidth, validConfig.cropWidth);
+    assert_equals(decoderSupport.config.displayWidth, validConfig.displayWidth);
+    assert_equals(decoderSupport.config.displayHeight, validConfig.displayHeight);
+
+    // The description BufferSource must copy the input config description.
+    assert_not_equals(decoderSupport.config.description, validConfig.description);
+    let parsedDescription = new Uint8Array(decoderSupport.config.description);
+    assert_equals(parsedDescription.length, validConfig.description.length);
+    for (let i = 0; i < parsedDescription.length; ++i) {
+      assert_equals(parsedDescription[i], validConfig.description[i]);
+    }
+  });
+}, 'Test that VideoDecoder.isConfigSupported() returns a parsed configuration');
+
+
 promise_test(t => {
   // VideoDecoderInit lacks required fields.
   assert_throws_js(TypeError, () => { new VideoDecoder({}); });