diff --git a/testing/web-platform/meta/css/css-properties-values-api/idlharness.html.ini b/testing/web-platform/meta/css/css-properties-values-api/idlharness.html.ini
index fd6ce9914723..9528172cf656 100644
--- a/testing/web-platform/meta/css/css-properties-values-api/idlharness.html.ini
+++ b/testing/web-platform/meta/css/css-properties-values-api/idlharness.html.ini
@@ -1,4 +1,7 @@
 [idlharness.html]
-  [Test IDL implementation of CSS Properties Values API]
+  [Partial namespace CSS: original namespace defined]
+    expected: FAIL
+
+  [CSS interface: operation registerProperty(PropertyDescriptor)]
     expected: FAIL
 
diff --git a/testing/web-platform/meta/mediacapture-record/idlharness.window.js.ini b/testing/web-platform/meta/mediacapture-record/idlharness.window.js.ini
index 51bc5694b94b..814368ca3a4a 100644
--- a/testing/web-platform/meta/mediacapture-record/idlharness.window.js.ini
+++ b/testing/web-platform/meta/mediacapture-record/idlharness.window.js.ini
@@ -1,4 +1,43 @@
 [idlharness.window.html]
-  [mediastream-recording interfaces]
+  [MediaRecorder interface: attribute onpause]
+    expected: FAIL
+
+  [MediaRecorder interface: attribute onresume]
+    expected: FAIL
+
+  [MediaRecorder interface: attribute videoBitsPerSecond]
+    expected: FAIL
+
+  [MediaRecorder interface: attribute audioBitsPerSecond]
+    expected: FAIL
+
+  [MediaRecorder interface: [object MediaRecorder\] must inherit property "onpause" with the proper type]
+    expected: FAIL
+
+  [MediaRecorder interface: [object MediaRecorder\] must inherit property "onresume" with the proper type]
+    expected: FAIL
+
+  [MediaRecorder interface: [object MediaRecorder\] must inherit property "videoBitsPerSecond" with the proper type]
+    expected: FAIL
+
+  [MediaRecorder interface: [object MediaRecorder\] must inherit property "audioBitsPerSecond" with the proper type]
+    expected: FAIL
+
+  [BlobEvent interface object length]
+    expected: FAIL
+
+  [BlobEvent interface: attribute timecode]
+    expected: FAIL
+
+  [BlobEvent interface: [object BlobEvent\] must inherit property "timecode" with the proper type]
+    expected: FAIL
+
+  [MediaRecorderErrorEvent must be primary interface of undefined]
+    expected: FAIL
+
+  [Stringification of undefined]
+    expected: FAIL
+
+  [MediaRecorderErrorEvent interface: undefined must inherit property "error" with the proper type]
     expected: FAIL
 
diff --git a/testing/web-platform/meta/mozilla-sync b/testing/web-platform/meta/mozilla-sync
index ead797d4b8d3..e527fc630e86 100644
--- a/testing/web-platform/meta/mozilla-sync
+++ b/testing/web-platform/meta/mozilla-sync
@@ -1,2 +1,2 @@
-local: 4c2b7fb8baa12d03122e90bb91094a116d55bb7a
-upstream: 20b68a5bb65b7566aa9d40f8e80d0d5e682a5fd0
+local: 38eaf263a00fa5313060ef98916ba095e285ccb7
+upstream: 24c4f1e5c434a5ad018aa7467b7bfcffca764b8d
diff --git a/testing/web-platform/meta/picture-in-picture/idlharness.window.js.ini b/testing/web-platform/meta/picture-in-picture/idlharness.window.js.ini
index 8e7cc7b45bcf..9b304c90c4a9 100644
--- a/testing/web-platform/meta/picture-in-picture/idlharness.window.js.ini
+++ b/testing/web-platform/meta/picture-in-picture/idlharness.window.js.ini
@@ -83,3 +83,6 @@
   [picture-in-picture interfaces.]
     expected: FAIL
 
+  [ShadowRoot interface: attribute pictureInPictureElement]
+    expected: FAIL
+
diff --git a/testing/web-platform/meta/picture-in-picture/request-picture-in-picture-twice.html.ini b/testing/web-platform/meta/picture-in-picture/request-picture-in-picture-twice.html.ini
deleted file mode 100644
index 4d1c5aeca147..000000000000
--- a/testing/web-platform/meta/picture-in-picture/request-picture-in-picture-twice.html.ini
+++ /dev/null
@@ -1,4 +0,0 @@
-[request-picture-in-picture-twice.html]
-  [request Picture-in-Picture consumes user gesture]
-    expected: FAIL
-
diff --git a/testing/web-platform/meta/pointerevents/idlharness.window.js.ini b/testing/web-platform/meta/pointerevents/idlharness.window.js.ini
new file mode 100644
index 000000000000..2c8f43716403
--- /dev/null
+++ b/testing/web-platform/meta/pointerevents/idlharness.window.js.ini
@@ -0,0 +1,19 @@
+[idlharness.window.html]
+  [Element interface: document must inherit property "setPointerCapture(long)" with the proper type]
+    expected: FAIL
+
+  [Element interface: calling setPointerCapture(long) on document with too few arguments must throw TypeError]
+    expected: FAIL
+
+  [Element interface: document must inherit property "releasePointerCapture(long)" with the proper type]
+    expected: FAIL
+
+  [Element interface: calling releasePointerCapture(long) on document with too few arguments must throw TypeError]
+    expected: FAIL
+
+  [Element interface: document must inherit property "hasPointerCapture(long)" with the proper type]
+    expected: FAIL
+
+  [Element interface: calling hasPointerCapture(long) on document with too few arguments must throw TypeError]
+    expected: FAIL
+
diff --git a/testing/web-platform/meta/selection/idlharness.window.js.ini b/testing/web-platform/meta/selection/idlharness.window.js.ini
index 178c7e956c2d..f9f19f2426ca 100644
--- a/testing/web-platform/meta/selection/idlharness.window.js.ini
+++ b/testing/web-platform/meta/selection/idlharness.window.js.ini
@@ -11,3 +11,6 @@
   [Window interface: window must inherit property "onselectionchange" with the proper type]
     expected: FAIL
 
+  [HTMLElement interface: attribute onselectionchange]
+    expected: FAIL
+
diff --git a/testing/web-platform/meta/webrtc/RTCPeerConnection-getStats.https.html.ini b/testing/web-platform/meta/webrtc/RTCPeerConnection-getStats.https.html.ini
index a16fe04e8bf5..b3d42f4d4a36 100644
--- a/testing/web-platform/meta/webrtc/RTCPeerConnection-getStats.https.html.ini
+++ b/testing/web-platform/meta/webrtc/RTCPeerConnection-getStats.https.html.ini
@@ -29,6 +29,3 @@
   [getStats() with connected peer connections having tracks and data channel should return all mandatory to implement stats]
     expected: FAIL
 
-  [getStats() with track added via addTransceiver should succeed]
-    expected: FAIL
-
diff --git a/testing/web-platform/meta/webrtc/RTCPeerConnection-removeTrack.https.html.ini b/testing/web-platform/meta/webrtc/RTCPeerConnection-removeTrack.https.html.ini
index 2cdff12e6a22..07dadacf1b6b 100644
--- a/testing/web-platform/meta/webrtc/RTCPeerConnection-removeTrack.https.html.ini
+++ b/testing/web-platform/meta/webrtc/RTCPeerConnection-removeTrack.https.html.ini
@@ -5,21 +5,3 @@
   [Calling removeTrack with currentDirection recvonly should not change direction]
     expected: FAIL
 
-  [addTransceiver - Calling removeTrack when connection is closed should throw InvalidStateError]
-    expected: FAIL
-
-  [addTransceiver - Calling removeTrack on different connection that is closed should throw InvalidStateError]
-    expected: FAIL
-
-  [addTransceiver - Calling removeTrack on different connection should throw InvalidAccessError]
-    expected: FAIL
-
-  [addTransceiver - Calling removeTrack with valid sender should set sender.track to null]
-    expected: FAIL
-
-  [Calling removeTrack with currentDirection sendonly should set direction to inactive]
-    expected: FAIL
-
-  [Calling removeTrack with currentDirection inactive should not change direction]
-    expected: FAIL
-