--- a/testing/web-platform/meta/css/cssom-view/idlharness.html.ini
+++ b/testing/web-platform/meta/css/cssom-view/idlharness.html.ini
@@ -1,19 +1,16 @@
 [idlharness.html]
   prefs: [layout.css.getBoxQuads.enabled:true, layout.css.convertFromNode.enabled:true, dom.innerSize.rounded:true]
   [Screen interface: existence and properties of interface prototype object]
     expected: FAIL
 
   [Screen interface: existence and properties of interface object]
     expected: FAIL
 
-  [Partial interface MouseEvent: member names are unique]
-    expected: FAIL
-
   [Partial dictionary MouseEventInit: member names are unique]
     expected: FAIL
 
   [CSSPseudoElement interface: operation convertPointFromNode(DOMPointInit, GeometryNode, optional ConvertCoordinateOptions)]
     expected: FAIL
 
   [CSSPseudoElement interface: operation convertRectFromNode(DOMRectReadOnly, GeometryNode, optional ConvertCoordinateOptions)]
     expected: FAIL

--- a/testing/web-platform/meta/html/dom/idlharness.https.html.ini
+++ b/testing/web-platform/meta/html/dom/idlharness.https.html.ini
@@ -915,8 +915,17 @@ prefs: [dom.security.featurePolicy.exper
     expected: FAIL
 
   [HTMLSourceElement interface: document.createElement("source") must inherit property "width" with the proper type]
     expected: FAIL
 
   [HTMLSourceElement interface: document.createElement("source") must inherit property "height" with the proper type]
     expected: FAIL
 
+  [HTMLSlotElement interface: operation assign((Element or Text)...)]
+    expected: FAIL
+
+  [HTMLSlotElement interface: document.createElement("slot") must inherit property "assign((Element or Text)...)" with the proper type]
+    expected: FAIL
+
+  [HTMLSlotElement interface: calling assign((Element or Text)...) on document.createElement("slot") with too few arguments must throw TypeError]
+    expected: FAIL
+

--- a/testing/web-platform/meta/origin-policy/idlharness.any.js.ini
+++ b/testing/web-platform/meta/origin-policy/idlharness.any.js.ini
@@ -2,16 +2,18 @@
   [WorkerGlobalScope interface: self must inherit property "originPolicyIds" with the proper type]
     expected: FAIL
 
   [WorkerGlobalScope interface: attribute originPolicyIds]
     expected: FAIL
 
 
 [idlharness.any.html]
+  expected:
+    if (os == "android") and debug and webrender: ["OK", "CRASH"]
   [Window interface: self must inherit property "originPolicyIds" with the proper type]
     expected: FAIL
 
   [Window interface: attribute originPolicyIds]
     expected: FAIL
 
 
 [idlharness.any.worker.html]

--- a/testing/web-platform/meta/periodic-background-sync/idlharness.https.any.js.ini
+++ b/testing/web-platform/meta/periodic-background-sync/idlharness.https.any.js.ini
@@ -60,16 +60,19 @@
     expected: FAIL
 
   [PeriodicSyncManager interface: existence and properties of interface object]
     expected: FAIL
 
   [PeriodicSyncManager interface: operation getTags()]
     expected: FAIL
 
+  [PeriodicSyncEvent interface: new PeriodicSyncEvent("tag") must not have property "undefined"]
+    expected: FAIL
+
 
 [idlharness.https.any.html]
   [ServiceWorkerGlobalScope interface: onperiodicsync must not have property "onperiodicsync"]
     expected: FAIL
 
   [ServiceWorkerRegistration interface: attribute periodicSync]
     expected: FAIL
 
@@ -128,8 +131,11 @@
     expected: FAIL
 
   [PeriodicSyncManager interface: existence and properties of interface object]
     expected: FAIL
 
   [PeriodicSyncManager interface: operation getTags()]
     expected: FAIL
 
+  [PeriodicSyncEvent interface: new PeriodicSyncEvent("tag") must not have property "undefined"]
+    expected: FAIL
+

--- a/testing/web-platform/meta/svg/idlharness.window.js.ini
+++ b/testing/web-platform/meta/svg/idlharness.window.js.ini
@@ -333,8 +333,68 @@
     expected: FAIL
 
   [SVGGraphicsElement interface: objects.symbol must inherit property "getBBox(optional SVGBoundingBoxOptions)" with the proper type]
     expected: FAIL
 
   [SVGSVGElement interface: objects.svg must inherit property "getIntersectionList(DOMRectReadOnly, SVGElement?)" with the proper type]
     expected: FAIL
 
+  [SVGAElement interface: attribute origin]
+    expected: FAIL
+
+  [SVGAElement interface: attribute protocol]
+    expected: FAIL
+
+  [SVGAElement interface: attribute username]
+    expected: FAIL
+
+  [SVGAElement interface: attribute password]
+    expected: FAIL
+
+  [SVGAElement interface: attribute host]
+    expected: FAIL
+
+  [SVGAElement interface: attribute hostname]
+    expected: FAIL
+
+  [SVGAElement interface: attribute port]
+    expected: FAIL
+
+  [SVGAElement interface: attribute pathname]
+    expected: FAIL
+
+  [SVGAElement interface: attribute search]
+    expected: FAIL
+
+  [SVGAElement interface: attribute hash]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "origin" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "protocol" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "username" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "password" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "host" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "hostname" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "port" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "pathname" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "search" with the proper type]
+    expected: FAIL
+
+  [SVGAElement interface: objects.a must inherit property "hash" with the proper type]
+    expected: FAIL
+

--- a/testing/web-platform/meta/ua-client-hints/idlharness.https.any.js.ini
+++ b/testing/web-platform/meta/ua-client-hints/idlharness.https.any.js.ini
@@ -45,16 +45,22 @@
     expected: FAIL
 
   [Navigator interface: attribute userAgentData]
     expected: FAIL
 
   [NavigatorUAData interface: attribute mobile]
     expected: FAIL
 
+  [NavigatorUAData interface: attribute platform]
+    expected: FAIL
+
+  [NavigatorUAData interface: navigator.userAgentData must inherit property "platform" with the proper type]
+    expected: FAIL
+
 
 [idlharness.https.any.worker.html]
   [NavigatorUAData interface object name]
     expected: FAIL
 
   [NavigatorUAData interface: existence and properties of interface prototype object]
     expected: FAIL
 
@@ -98,8 +104,14 @@
     expected: FAIL
 
   [NavigatorUAData interface: existence and properties of interface prototype object's "constructor" property]
     expected: FAIL
 
   [NavigatorUAData interface: attribute mobile]
     expected: FAIL
 
+  [NavigatorUAData interface: attribute platform]
+    expected: FAIL
+
+  [NavigatorUAData interface: navigator.userAgentData must inherit property "platform" with the proper type]
+    expected: FAIL
+

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/wasm/jsapi/idlharness.any.js.ini
@@ -0,0 +1,9 @@
+[idlharness.any.html]
+  [Table interface: operation set(unsigned long, optional any)]
+    expected: FAIL
+
+
+[idlharness.any.worker.html]
+  [Table interface: operation set(unsigned long, optional any)]
+    expected: FAIL
+

deleted file mode 100644
--- a/testing/web-platform/meta/webrtc-insertable-streams/RTCPeerConnection-insertable-streams-legacy.https.html.ini
+++ /dev/null
@@ -1,7 +0,0 @@
-[RTCPeerConnection-insertable-streams-legacy.https.html]
-  expected:
-    if (os == "linux") and debug and webrender: ["OK", "ERROR", "TIMEOUT"]
-    if (os == "linux") and debug and not webrender: ["OK", "TIMEOUT"]
-    if (os == "linux") and not debug: ["OK", "ERROR", "TIMEOUT", "CRASH"]
-  [Legacy API works]
-    expected: FAIL

new file mode 100644
--- /dev/null
+++ b/testing/web-platform/meta/webvtt/api/idlharness.window.js.ini
@@ -0,0 +1,3 @@
+[idlharness.window.html]
+  expected:
+    if (os == "android") and debug and not webrender: ["OK", "CRASH"]

--- a/testing/web-platform/meta/webxr/idlharness.https.window.js.ini
+++ b/testing/web-platform/meta/webxr/idlharness.https.window.js.ini
@@ -783,8 +783,14 @@
     expected: FAIL
 
   [XRView interface: attribute recommendedViewportScale]
     expected: FAIL
 
   [XRView interface: operation requestViewportScale(double?)]
     expected: FAIL
 
+  [XRPose interface: attribute linearVelocity]
+    expected: FAIL
+
+  [XRPose interface: attribute angularVelocity]
+    expected: FAIL
+