diff --git a/test/fixtures/wpt/interfaces/fedcm.idl b/test/fixtures/wpt/interfaces/fedcm.idl
index ba99f1174c8..443d3311a24 100644
--- a/test/fixtures/wpt/interfaces/fedcm.idl
+++ b/test/fixtures/wpt/interfaces/fedcm.idl
@@ -43,6 +43,7 @@ dictionary IdentityProviderRequestOptions : IdentityProviderConfig {
   USVString nonce;
   DOMString loginHint;
   DOMString domainHint;
+  any params;
 };
 
 dictionary IdentityProviderWellKnown {
diff --git a/test/fixtures/wpt/interfaces/fenced-frame.idl b/test/fixtures/wpt/interfaces/fenced-frame.idl
index 8c5fa31bea8..cdc35d04ca4 100644
--- a/test/fixtures/wpt/interfaces/fenced-frame.idl
+++ b/test/fixtures/wpt/interfaces/fenced-frame.idl
@@ -74,9 +74,14 @@ interface Fence {
     undefined reportEvent(optional ReportEventType event = {});
     undefined setReportEventDataForAutomaticBeacons(optional FenceEvent event = {});
     sequence<FencedFrameConfig> getNestedConfigs();
+    undefined notifyEvent(Event event);
 };
 
 partial interface Window {
   // Collection of fenced frame APIs
   readonly attribute Fence? fence;
 };
+
+partial interface mixin GlobalEventHandlers {
+  attribute EventHandler onfencedtreeclick;
+};
diff --git a/test/fixtures/wpt/interfaces/html.idl b/test/fixtures/wpt/interfaces/html.idl
index 25e1f8a4ca0..c295941fcb2 100644
--- a/test/fixtures/wpt/interfaces/html.idl
+++ b/test/fixtures/wpt/interfaces/html.idl
@@ -881,10 +881,12 @@ interface HTMLInputElement : HTMLElement {
   [HTMLConstructor] constructor();
 
   [CEReactions] attribute DOMString accept;
+  [CEReactions] attribute boolean alpha;
   [CEReactions] attribute DOMString alt;
   [CEReactions] attribute DOMString autocomplete;
   [CEReactions] attribute boolean defaultChecked;
   attribute boolean checked;
+  [CEReactions] attribute DOMString colorSpace;
   [CEReactions] attribute DOMString dirName;
   [CEReactions] attribute boolean disabled;
   readonly attribute HTMLFormElement? form;
diff --git a/test/fixtures/wpt/interfaces/invokers.tentative.idl b/test/fixtures/wpt/interfaces/invokers.tentative.idl
index 4724d7deb08..046a365939c 100644
--- a/test/fixtures/wpt/interfaces/invokers.tentative.idl
+++ b/test/fixtures/wpt/interfaces/invokers.tentative.idl
@@ -1,15 +1,15 @@
-interface mixin InvokerElement {
-  [CEReactions,Reflect=invoketarget] attribute Element? commandForElement;
-  [CEReactions,Reflect=invokeaction] attribute DOMString command;
+interface mixin CommandElement {
+  [CEReactions,Reflect=commandfor] attribute Element? commandForElement;
+  [CEReactions,Reflect=command] attribute DOMString command;
 };
 
 interface CommandEvent : Event {
     constructor(DOMString type, optional CommandEventInit eventInitDict = {});
-    readonly attribute Element? invoker;
+    readonly attribute Element? source;
     readonly attribute DOMString command;
 };
 
 dictionary CommandEventInit : EventInit {
-    Element? invoker = null;
+    Element? source = null;
     DOMString command = "";
 };
diff --git a/test/fixtures/wpt/interfaces/mediasession.idl b/test/fixtures/wpt/interfaces/mediasession.idl
index 5c6942be5a0..9c050b0efdf 100644
--- a/test/fixtures/wpt/interfaces/mediasession.idl
+++ b/test/fixtures/wpt/interfaces/mediasession.idl
@@ -59,7 +59,7 @@ interface MediaMetadata {
   attribute DOMString title;
   attribute DOMString artist;
   attribute DOMString album;
-  attribute FrozenArray<MediaImage> artwork;
+  attribute FrozenArray<object> artwork;
   [SameObject] readonly attribute FrozenArray<ChapterInformation> chapterInfo;
 };
 
diff --git a/test/fixtures/wpt/interfaces/private-aggregation-api.idl b/test/fixtures/wpt/interfaces/private-aggregation-api.idl
index cee17c63f04..c89a4687abb 100644
--- a/test/fixtures/wpt/interfaces/private-aggregation-api.idl
+++ b/test/fixtures/wpt/interfaces/private-aggregation-api.idl
@@ -19,55 +19,3 @@ dictionary PAHistogramContribution {
 dictionary PADebugModeOptions {
   required bigint debugKey;
 };
-
-partial interface InterestGroupScriptRunnerGlobalScope {
-  readonly attribute PrivateAggregation privateAggregation;
-};
-
-dictionary PASignalValue {
-  required DOMString baseValue;
-  double scale;
-  (bigint or long) offset;
-};
-
-dictionary PAExtendedHistogramContribution {
-  required (PASignalValue or bigint) bucket;
-  required (PASignalValue or long) value;
-  bigint filteringId = 0;
-};
-
-[Exposed=InterestGroupScriptRunnerGlobalScope, SecureContext]
-partial interface PrivateAggregation {
-  undefined contributeToHistogramOnEvent(
-      DOMString event, PAExtendedHistogramContribution contribution);
-};
-
-dictionary AuctionReportBuyersConfig {
-  required bigint bucket;
-  required double scale;
-};
-
-dictionary AuctionReportBuyerDebugModeConfig {
-  boolean enabled = false;
-
-  // Must only be provided if `enabled` is true.
-  bigint? debugKey;
-};
-
-partial dictionary AuctionAdConfig {
-  sequence<bigint> auctionReportBuyerKeys;
-  record<DOMString, AuctionReportBuyersConfig> auctionReportBuyers;
-  AuctionReportBuyerDebugModeConfig auctionReportBuyerDebugModeConfig;
-};
-
-dictionary ProtectedAudiencePrivateAggregationConfig {
-  USVString aggregationCoordinatorOrigin;
-};
-
-partial dictionary AuctionAdConfig {
-  ProtectedAudiencePrivateAggregationConfig privateAggregationConfig;
-};
-
-partial dictionary AuctionAdInterestGroup {
-  ProtectedAudiencePrivateAggregationConfig privateAggregationConfig;
-};
diff --git a/test/fixtures/wpt/interfaces/resource-timing.idl b/test/fixtures/wpt/interfaces/resource-timing.idl
index 33fed05b756..66f2841d744 100644
--- a/test/fixtures/wpt/interfaces/resource-timing.idl
+++ b/test/fixtures/wpt/interfaces/resource-timing.idl
@@ -18,6 +18,7 @@ interface PerformanceResourceTiming : PerformanceEntry {
     readonly attribute DOMHighResTimeStamp connectEnd;
     readonly attribute DOMHighResTimeStamp secureConnectionStart;
     readonly attribute DOMHighResTimeStamp requestStart;
+    readonly attribute DOMHighResTimeStamp finalResponseHeadersStart;
     readonly attribute DOMHighResTimeStamp firstInterimResponseStart;
     readonly attribute DOMHighResTimeStamp responseStart;
     readonly attribute DOMHighResTimeStamp responseEnd;
diff --git a/test/fixtures/wpt/interfaces/turtledove.idl b/test/fixtures/wpt/interfaces/turtledove.idl
index ff48d311914..c416760d595 100644
--- a/test/fixtures/wpt/interfaces/turtledove.idl
+++ b/test/fixtures/wpt/interfaces/turtledove.idl
@@ -15,6 +15,7 @@ dictionary AuctionAd {
 
   USVString buyerReportingId;
   USVString buyerAndSellerReportingId;
+  sequence<USVString> selectableBuyerAndSellerReportingIds;
   sequence<USVString> allowedReportingOrigins;
   DOMString adRenderId;
 };
@@ -47,11 +48,16 @@ dictionary GenerateBidInterestGroup {
   record<DOMString, sequence<DOMString>> sizeGroups;
 };
 
+dictionary ProtectedAudiencePrivateAggregationConfig {
+  USVString aggregationCoordinatorOrigin;
+};
+
 dictionary AuctionAdInterestGroup : GenerateBidInterestGroup {
   double priority = 0.0;
   record<DOMString, double> prioritySignalsOverrides;
   required double lifetimeMs;
   DOMString additionalBidKey;
+  ProtectedAudiencePrivateAggregationConfig privateAggregationConfig;
 };
 
 [SecureContext]
@@ -76,6 +82,18 @@ partial interface Navigator {
   readonly attribute boolean deprecatedRunAdAuctionEnforcesKAnonymity;
 };
 
+dictionary AuctionReportBuyersConfig {
+  required bigint bucket;
+  required double scale;
+};
+
+dictionary AuctionReportBuyerDebugModeConfig {
+  boolean enabled = false;
+
+  // Must only be provided if `enabled` is true.
+  bigint? debugKey;
+};
+
 dictionary AuctionRealTimeReportingConfig {
   required DOMString type;
 };
@@ -89,21 +107,27 @@ dictionary AuctionAdConfig {
   sequence<USVString> interestGroupBuyers;
   Promise<any> auctionSignals;
   Promise<any> sellerSignals;
-  Promise<DOMString> directFromSellerSignalsHeaderAdSlot;
-  Promise<record<USVString, USVString>> deprecatedRenderURLReplacements;
+  Promise<DOMString?> directFromSellerSignalsHeaderAdSlot;
+  Promise<record<USVString, USVString>?> deprecatedRenderURLReplacements;
   unsigned long long sellerTimeout;
   unsigned short sellerExperimentGroupId;
-  Promise<record<USVString, any>> perBuyerSignals;
-  Promise<record<USVString, unsigned long long>> perBuyerTimeouts;
-  Promise<record<USVString, unsigned long long>> perBuyerCumulativeTimeouts;
+  Promise<record<USVString, any>?> perBuyerSignals;
+  Promise<record<USVString, unsigned long long>?> perBuyerTimeouts;
+  Promise<record<USVString, unsigned long long>?> perBuyerCumulativeTimeouts;
   unsigned long long reportingTimeout;
   USVString sellerCurrency;
-  Promise<record<USVString, USVString>> perBuyerCurrencies;
+  Promise<record<USVString, USVString>?> perBuyerCurrencies;
   record<USVString, unsigned short> perBuyerMultiBidLimits;
   record<USVString, unsigned short> perBuyerGroupLimits;
   record<USVString, unsigned short> perBuyerExperimentGroupIds;
   record<USVString, record<USVString, double>> perBuyerPrioritySignals;
+
+  sequence<bigint> auctionReportBuyerKeys;
+  record<DOMString, AuctionReportBuyersConfig> auctionReportBuyers;
+  AuctionReportBuyerDebugModeConfig auctionReportBuyerDebugModeConfig;
   sequence<DOMString> requiredSellerCapabilities;
+  ProtectedAudiencePrivateAggregationConfig privateAggregationConfig;
+
   record<DOMString, DOMString> requestedSize;
   sequence<record<DOMString, DOMString>> allSlotsRequestedSizes;
   Promise<undefined> additionalBids;
@@ -144,6 +168,18 @@ dictionary AdAuctionDataBuyerConfig {
   unsigned long targetSize;
 };
 
+dictionary StorageInterestGroup : AuctionAdInterestGroup {
+  unsigned long long joinCount;
+  unsigned long long bidCount;
+  sequence<PreviousWin> prevWinsMs;
+  USVString joiningOrigin;
+  long long timeSinceGroupJoinedMs;
+  long long lifetimeRemainingMs;
+  long long timeSinceLastUpdateMs;
+  long long timeUntilNextUpdateMs;
+  unsigned long long estimatedSize;
+};
+
 [SecureContext]
 partial interface Navigator {
   Promise<DOMString> createAuctionNonce();
@@ -151,6 +187,25 @@ partial interface Navigator {
 
 [Exposed=InterestGroupScriptRunnerGlobalScope]
 interface InterestGroupScriptRunnerGlobalScope {
+  readonly attribute PrivateAggregation? privateAggregation;
+};
+
+dictionary PASignalValue {
+  required DOMString baseValue;
+  double scale;
+  (bigint or long) offset;
+};
+
+dictionary PAExtendedHistogramContribution {
+  required (PASignalValue or bigint) bucket;
+  required (PASignalValue or long) value;
+  bigint filteringId = 0;
+};
+
+[Exposed=InterestGroupScriptRunnerGlobalScope]
+partial interface PrivateAggregation {
+  undefined contributeToHistogramOnEvent(
+      DOMString event, PAExtendedHistogramContribution contribution);
 };
 
 [Exposed=InterestGroupBiddingAndScoringScriptRunnerGlobalScope]
@@ -198,6 +253,7 @@ dictionary GenerateBidOutput {
   DOMString bidCurrency;
   (DOMString or AdRender) render;
   any ad;
+  USVString selectedBuyerAndSellerReportingId;
   sequence<(DOMString or AdRender)> adComponents;
   double adCost;
   unrestricted double modelingSignals;
@@ -294,6 +350,7 @@ dictionary ReportingBrowserSignals {
   USVString componentSeller;
 
   USVString buyerAndSellerReportingId;
+  USVString selectedBuyerAndSellerReportingId;
 };
 
 dictionary ReportResultBrowserSignals : ReportingBrowserSignals {
diff --git a/test/fixtures/wpt/interfaces/user-timing.idl b/test/fixtures/wpt/interfaces/user-timing.idl
index 28ee8aac2b1..fc6d3082258 100644
--- a/test/fixtures/wpt/interfaces/user-timing.idl
+++ b/test/fixtures/wpt/interfaces/user-timing.idl
@@ -1,7 +1,7 @@
 // GENERATED CONTENT - DO NOT EDIT
 // Content was automatically extracted by Reffy into webref
 // (https://github.com/w3c/webref)
-// Source: User Timing Level 3 (https://w3c.github.io/user-timing/)
+// Source: User Timing (https://w3c.github.io/user-timing/)
 
 dictionary PerformanceMarkOptions {
     any detail;
diff --git a/test/fixtures/wpt/interfaces/web-animations.idl b/test/fixtures/wpt/interfaces/web-animations.idl
index 1bc82fab119..c36588af478 100644
--- a/test/fixtures/wpt/interfaces/web-animations.idl
+++ b/test/fixtures/wpt/interfaces/web-animations.idl
@@ -136,6 +136,7 @@ dictionary KeyframeAnimationOptions : KeyframeEffectOptions {
 
 dictionary GetAnimationsOptions {
     boolean subtree = false;
+    CSSOMString? pseudoElement = null;
 };
 
 partial interface Document {
diff --git a/test/fixtures/wpt/interfaces/webaudio.idl b/test/fixtures/wpt/interfaces/webaudio.idl
index 74aab7e2362..d14eb96820f 100644
--- a/test/fixtures/wpt/interfaces/webaudio.idl
+++ b/test/fixtures/wpt/interfaces/webaudio.idl
@@ -1,7 +1,7 @@
 // GENERATED CONTENT - DO NOT EDIT
 // Content was automatically extracted by Reffy into webref
 // (https://github.com/w3c/webref)
-// Source: Web Audio API (https://webaudio.github.io/web-audio-api/)
+// Source: Web Audio API 1.1 (https://webaudio.github.io/web-audio-api/)
 
 enum AudioContextState {
     "suspended",
@@ -33,8 +33,8 @@ interface BaseAudioContext : EventTarget {
     AnalyserNode createAnalyser ();
     BiquadFilterNode createBiquadFilter ();
     AudioBuffer createBuffer (unsigned long numberOfChannels,
-                              unsigned long length,
-                              float sampleRate);
+                                unsigned long length,
+                                float sampleRate);
     AudioBufferSourceNode createBufferSource ();
     ChannelMergerNode createChannelMerger (optional unsigned long numberOfInputs = 6);
     ChannelSplitterNode createChannelSplitter (
@@ -45,12 +45,12 @@ interface BaseAudioContext : EventTarget {
     DynamicsCompressorNode createDynamicsCompressor ();
     GainNode createGain ();
     IIRFilterNode createIIRFilter (sequence<double> feedforward,
-                                   sequence<double> feedback);
+                                    sequence<double> feedback);
     OscillatorNode createOscillator ();
     PannerNode createPanner ();
     PeriodicWave createPeriodicWave (sequence<float> real,
-                                     sequence<float> imag,
-                                     optional PeriodicWaveConstraints constraints = {});
+                                        sequence<float> imag,
+                                        optional PeriodicWaveConstraints constraints = {});
     ScriptProcessorNode createScriptProcessor(
         optional unsigned long bufferSize = 0,
         optional unsigned long numberOfInputChannels = 2,
diff --git a/test/fixtures/wpt/interfaces/webcodecs.idl b/test/fixtures/wpt/interfaces/webcodecs.idl
index 52731257f1f..5cd4adf9348 100644
--- a/test/fixtures/wpt/interfaces/webcodecs.idl
+++ b/test/fixtures/wpt/interfaces/webcodecs.idl
@@ -317,6 +317,8 @@ interface VideoFrame {
   readonly attribute unsigned long codedHeight;
   readonly attribute DOMRectReadOnly? codedRect;
   readonly attribute DOMRectReadOnly? visibleRect;
+  readonly attribute double rotation;
+  readonly attribute boolean flip;
   readonly attribute unsigned long displayWidth;
   readonly attribute unsigned long displayHeight;
   readonly attribute unsigned long long? duration;  // microseconds
@@ -340,10 +342,13 @@ dictionary VideoFrameInit {
   AlphaOption alpha = "keep";
 
   // Default matches image. May be used to efficiently crop. Will trigger
-  // new computation of displayWidth and displayHeight using image’s pixel
+  // new computation of displayWidth and displayHeight using image's pixel
   // aspect ratio unless an explicit displayWidth and displayHeight are given.
   DOMRectInit visibleRect;
 
+  double rotation = 0;
+  boolean flip = false;
+
   // Default matches image unless visibleRect is provided.
   [EnforceRange] unsigned long displayWidth;
   [EnforceRange] unsigned long displayHeight;
@@ -364,6 +369,9 @@ dictionary VideoFrameBufferInit {
   // Default visible rect is coded size positioned at (0,0)
   DOMRectInit visibleRect;
 
+  double rotation = 0;
+  boolean flip = false;
+
   // Default display dimensions match visibleRect.
   [EnforceRange] unsigned long displayWidth;
   [EnforceRange] unsigned long displayHeight;
diff --git a/test/fixtures/wpt/interfaces/webgpu.idl b/test/fixtures/wpt/interfaces/webgpu.idl
index 421685c7a8f..ebd3b4ab67e 100644
--- a/test/fixtures/wpt/interfaces/webgpu.idl
+++ b/test/fixtures/wpt/interfaces/webgpu.idl
@@ -119,6 +119,7 @@ enum GPUFeatureName {
     "rg11b10ufloat-renderable",
     "bgra8unorm-storage",
     "float32-filterable",
+    "float32-blendable",
     "clip-distances",
     "dual-source-blending",
 };
@@ -569,7 +570,7 @@ GPUPipelineLayout includes GPUObjectBase;
 
 dictionary GPUPipelineLayoutDescriptor
          : GPUObjectDescriptorBase {
-    required sequence<GPUBindGroupLayout> bindGroupLayouts;
+    required sequence<GPUBindGroupLayout?> bindGroupLayouts;
 };
 
 [Exposed=(Window, Worker), SecureContext]
@@ -809,22 +810,31 @@ enum GPUIndexFormat {
 };
 
 enum GPUVertexFormat {
+    "uint8",
     "uint8x2",
     "uint8x4",
+    "sint8",
     "sint8x2",
     "sint8x4",
+    "unorm8",
     "unorm8x2",
     "unorm8x4",
+    "snorm8",
     "snorm8x2",
     "snorm8x4",
+    "uint16",
     "uint16x2",
     "uint16x4",
+    "sint16",
     "sint16x2",
     "sint16x4",
+    "unorm16",
     "unorm16x2",
     "unorm16x4",
+    "snorm16",
     "snorm16x2",
     "snorm16x4",
+    "float16",
     "float16x2",
     "float16x4",
     "float32",
@@ -840,6 +850,7 @@ enum GPUVertexFormat {
     "sint32x3",
     "sint32x4",
     "unorm10-10-10-2",
+    "unorm8x4-bgra",
 };
 
 enum GPUVertexStepMode {
@@ -865,26 +876,26 @@ dictionary GPUVertexAttribute {
     required GPUIndex32 shaderLocation;
 };
 
-dictionary GPUImageDataLayout {
+dictionary GPUTexelCopyBufferLayout {
     GPUSize64 offset = 0;
     GPUSize32 bytesPerRow;
     GPUSize32 rowsPerImage;
 };
 
-dictionary GPUImageCopyBuffer
-         : GPUImageDataLayout {
+dictionary GPUTexelCopyBufferInfo
+         : GPUTexelCopyBufferLayout {
     required GPUBuffer buffer;
 };
 
-dictionary GPUImageCopyTexture {
+dictionary GPUTexelCopyTextureInfo {
     required GPUTexture texture;
     GPUIntegerCoordinate mipLevel = 0;
     GPUOrigin3D origin = {};
     GPUTextureAspect aspect = "all";
 };
 
-dictionary GPUImageCopyTextureTagged
-         : GPUImageCopyTexture {
+dictionary GPUCopyExternalImageDestInfo
+         : GPUTexelCopyTextureInfo {
     PredefinedColorSpace colorSpace = "srgb";
     boolean premultipliedAlpha = false;
 };
@@ -895,10 +906,10 @@ typedef (ImageBitmap or
          HTMLVideoElement or
          VideoFrame or
          HTMLCanvasElement or
-         OffscreenCanvas) GPUImageCopyExternalImageSource;
+         OffscreenCanvas) GPUCopyExternalImageSource;
 
-dictionary GPUImageCopyExternalImage {
-    required GPUImageCopyExternalImageSource source;
+dictionary GPUCopyExternalImageSourceInfo {
+    required GPUCopyExternalImageSource source;
     GPUOrigin2D origin = {};
     boolean flipY = false;
 };
@@ -928,18 +939,18 @@ interface GPUCommandEncoder {
         GPUSize64 size);
 
     undefined copyBufferToTexture(
-        GPUImageCopyBuffer source,
-        GPUImageCopyTexture destination,
+        GPUTexelCopyBufferInfo source,
+        GPUTexelCopyTextureInfo destination,
         GPUExtent3D copySize);
 
     undefined copyTextureToBuffer(
-        GPUImageCopyTexture source,
-        GPUImageCopyBuffer destination,
+        GPUTexelCopyTextureInfo source,
+        GPUTexelCopyBufferInfo destination,
         GPUExtent3D copySize);
 
     undefined copyTextureToTexture(
-        GPUImageCopyTexture source,
-        GPUImageCopyTexture destination,
+        GPUTexelCopyTextureInfo source,
+        GPUTexelCopyTextureInfo destination,
         GPUExtent3D copySize);
 
     undefined clearBuffer(
@@ -1144,14 +1155,14 @@ interface GPUQueue {
         optional GPUSize64 size);
 
     undefined writeTexture(
-        GPUImageCopyTexture destination,
+        GPUTexelCopyTextureInfo destination,
         AllowSharedBufferSource data,
-        GPUImageDataLayout dataLayout,
+        GPUTexelCopyBufferLayout dataLayout,
         GPUExtent3D size);
 
     undefined copyExternalImageToTexture(
-        GPUImageCopyExternalImage source,
-        GPUImageCopyTextureTagged destination,
+        GPUCopyExternalImageSourceInfo source,
+        GPUCopyExternalImageDestInfo destination,
         GPUExtent3D copySize);
 };
 GPUQueue includes GPUObjectBase;
@@ -1274,7 +1285,6 @@ dictionary GPUUncapturedErrorEventInit : EventInit {
 };
 
 partial interface GPUDevice {
-    [Exposed=(Window, Worker)]
     attribute EventHandler onuncapturederror;
 };
 
diff --git a/test/fixtures/wpt/interfaces/webnn.idl b/test/fixtures/wpt/interfaces/webnn.idl
index 8329e7d2b33..112fa2bf832 100644
--- a/test/fixtures/wpt/interfaces/webnn.idl
+++ b/test/fixtures/wpt/interfaces/webnn.idl
@@ -95,8 +95,8 @@ dictionary MLOperandDescriptor {
 
 [SecureContext, Exposed=(Window, DedicatedWorker)]
 interface MLOperand {
-  MLOperandDataType dataType();
-  sequence<unsigned long> shape();
+  readonly attribute MLOperandDataType dataType;
+  readonly attribute FrozenArray<unsigned long> shape;
 };
 
 dictionary MLOperatorOptions {
@@ -872,7 +872,7 @@ dictionary MLSplitSupportLimits {
 };
 
 partial dictionary MLOpSupportLimits {
-  MLSingleInputSupportLimits split;
+  MLSplitSupportLimits split;
 };
 
 partial interface MLGraphBuilder {
diff --git a/test/fixtures/wpt/interfaces/webtransport.idl b/test/fixtures/wpt/interfaces/webtransport.idl
index 6e9d1036736..24fe5b7e61b 100644
--- a/test/fixtures/wpt/interfaces/webtransport.idl
+++ b/test/fixtures/wpt/interfaces/webtransport.idl
@@ -96,7 +96,8 @@ dictionary WebTransportConnectionStats {
   required DOMHighResTimeStamp rttVariation;
   required DOMHighResTimeStamp minRtt;
   required WebTransportDatagramStats datagrams;
-  required unsigned long long? estimatedSendRate;
+  unsigned long long? estimatedSendRate = null;
+  boolean atSendCapacity = false;
 };
 
 dictionary WebTransportDatagramStats {
diff --git a/test/fixtures/wpt/interfaces/webusb.idl b/test/fixtures/wpt/interfaces/webusb.idl
index 3b362d2351d..d6484db3e88 100644
--- a/test/fixtures/wpt/interfaces/webusb.idl
+++ b/test/fixtures/wpt/interfaces/webusb.idl
@@ -40,7 +40,7 @@ dictionary USBConnectionEventInit : EventInit {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBConnectionEvent : Event {
@@ -55,7 +55,7 @@ enum USBTransferStatus {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBInTransferResult {
@@ -65,7 +65,7 @@ interface USBInTransferResult {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBOutTransferResult {
@@ -75,7 +75,7 @@ interface USBOutTransferResult {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBIsochronousInTransferPacket {
@@ -85,7 +85,7 @@ interface USBIsochronousInTransferPacket {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBIsochronousInTransferResult {
@@ -95,7 +95,7 @@ interface USBIsochronousInTransferResult {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBIsochronousOutTransferPacket {
@@ -105,7 +105,7 @@ interface USBIsochronousOutTransferPacket {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBIsochronousOutTransferResult {
@@ -113,7 +113,7 @@ interface USBIsochronousOutTransferResult {
   readonly attribute FrozenArray<USBIsochronousOutTransferPacket> packets;
 };
 
-[Exposed=(DedicatedWorker,SharedWorker,Window), SecureContext]
+[Exposed=(Worker,Window), SecureContext]
 interface USBDevice {
   readonly attribute octet usbVersionMajor;
   readonly attribute octet usbVersionMinor;
@@ -171,7 +171,7 @@ dictionary USBControlTransferParameters {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBConfiguration {
@@ -182,7 +182,7 @@ interface USBConfiguration {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBInterface {
@@ -194,7 +194,7 @@ interface USBInterface {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBAlternateInterface {
@@ -219,7 +219,7 @@ enum USBEndpointType {
 };
 
 [
-  Exposed=(DedicatedWorker,SharedWorker,Window),
+  Exposed=(Worker,Window),
   SecureContext
 ]
 interface USBEndpoint {
@@ -252,7 +252,7 @@ dictionary USBPermissionStorage {
   sequence<AllowedUSBDevice> allowedDevices = [];
 };
 
-[Exposed=(DedicatedWorker,SharedWorker,Window)]
+[Exposed=(Worker,Window)]
 interface USBPermissionResult : PermissionStatus {
   attribute FrozenArray<USBDevice> devices;
 };
diff --git a/test/fixtures/wpt/interfaces/webxr.idl b/test/fixtures/wpt/interfaces/webxr.idl
index 26a720aa888..dea448d7440 100644
--- a/test/fixtures/wpt/interfaces/webxr.idl
+++ b/test/fixtures/wpt/interfaces/webxr.idl
@@ -40,6 +40,7 @@ enum XRVisibilityState {
   readonly attribute Float32Array? supportedFrameRates;
   [SameObject] readonly attribute XRRenderState renderState;
   [SameObject] readonly attribute XRInputSourceArray inputSources;
+  [SameObject] readonly attribute XRInputSourceArray trackedSources;
   readonly attribute FrozenArray<DOMString> enabledFeatures;
   readonly attribute boolean isSystemKeyboardSupported;
 
diff --git a/test/fixtures/wpt/resources/check-layout.js b/test/fixtures/wpt/resources/check-layout.js
deleted file mode 100644
index 8634481497d..00000000000
--- a/test/fixtures/wpt/resources/check-layout.js
+++ /dev/null
@@ -1,245 +0,0 @@
-(function() {
-
-function insertAfter(nodeToAdd, referenceNode)
-{
-    if (referenceNode == document.body) {
-        document.body.appendChild(nodeToAdd);
-        return;
-    }
-
-    if (referenceNode.nextSibling)
-        referenceNode.parentNode.insertBefore(nodeToAdd, referenceNode.nextSibling);
-    else
-        referenceNode.parentNode.appendChild(nodeToAdd);
-}
-
-function positionedAncestor(node)
-{
-    var ancestor = node.parentNode;
-    while (getComputedStyle(ancestor).position == 'static')
-        ancestor = ancestor.parentNode;
-    return ancestor;
-}
-
-function checkSubtreeExpectedValues(parent, failures)
-{
-    var checkedLayout = checkExpectedValues(parent, failures);
-    Array.prototype.forEach.call(parent.childNodes, function(node) {
-        checkedLayout |= checkSubtreeExpectedValues(node, failures);
-    });
-    return checkedLayout;
-}
-
-function checkAttribute(output, node, attribute)
-{
-    var result = node.getAttribute && node.getAttribute(attribute);
-    output.checked |= !!result;
-    return result;
-}
-
-function checkExpectedValues(node, failures)
-{
-    var output = { checked: false };
-    var expectedWidth = checkAttribute(output, node, "data-expected-width");
-    if (expectedWidth) {
-        if (isNaN(expectedWidth) || Math.abs(node.offsetWidth - expectedWidth) >= 1)
-            failures.push("Expected " + expectedWidth + " for width, but got " + node.offsetWidth + ". ");
-    }
-
-    var expectedHeight = checkAttribute(output, node, "data-expected-height");
-    if (expectedHeight) {
-        if (isNaN(expectedHeight) || Math.abs(node.offsetHeight - expectedHeight) >= 1)
-            failures.push("Expected " + expectedHeight + " for height, but got " + node.offsetHeight + ". ");
-    }
-
-    var expectedOffset = checkAttribute(output, node, "data-offset-x");
-    if (expectedOffset) {
-        if (isNaN(expectedOffset) || Math.abs(node.offsetLeft - expectedOffset) >= 1)
-            failures.push("Expected " + expectedOffset + " for offsetLeft, but got " + node.offsetLeft + ". ");
-    }
-
-    var expectedOffset = checkAttribute(output, node, "data-offset-y");
-    if (expectedOffset) {
-        if (isNaN(expectedOffset) || Math.abs(node.offsetTop - expectedOffset) >= 1)
-            failures.push("Expected " + expectedOffset + " for offsetTop, but got " + node.offsetTop + ". ");
-    }
-
-    var expectedOffset = checkAttribute(output, node, "data-positioned-offset-x");
-    if (expectedOffset) {
-        var actualOffset = node.getBoundingClientRect().left - positionedAncestor(node).getBoundingClientRect().left;
-        if (isNaN(expectedOffset) || Math.abs(actualOffset - expectedOffset) >= 1)
-            failures.push("Expected " + expectedOffset + " for getBoundingClientRect().left offset, but got " + actualOffset + ". ");
-    }
-
-    var expectedOffset = checkAttribute(output, node, "data-positioned-offset-y");
-    if (expectedOffset) {
-        var actualOffset = node.getBoundingClientRect().top - positionedAncestor(node).getBoundingClientRect().top;
-        if (isNaN(expectedOffset) || Math.abs(actualOffset - expectedOffset) >= 1)
-            failures.push("Expected " + expectedOffset + " for getBoundingClientRect().top offset, but got " + actualOffset + ". ");
-    }
-
-    var expectedWidth = checkAttribute(output, node, "data-expected-client-width");
-    if (expectedWidth) {
-        if (isNaN(expectedWidth) || Math.abs(node.clientWidth - expectedWidth) >= 1)
-            failures.push("Expected " + expectedWidth + " for clientWidth, but got " + node.clientWidth + ". ");
-    }
-
-    var expectedHeight = checkAttribute(output, node, "data-expected-client-height");
-    if (expectedHeight) {
-        if (isNaN(expectedHeight) || Math.abs(node.clientHeight - expectedHeight) >= 1)
-            failures.push("Expected " + expectedHeight + " for clientHeight, but got " + node.clientHeight + ". ");
-    }
-
-    var expectedWidth = checkAttribute(output, node, "data-expected-scroll-width");
-    if (expectedWidth) {
-        if (isNaN(expectedWidth) || Math.abs(node.scrollWidth - expectedWidth) >= 1)
-            failures.push("Expected " + expectedWidth + " for scrollWidth, but got " + node.scrollWidth + ". ");
-    }
-
-    var expectedHeight = checkAttribute(output, node, "data-expected-scroll-height");
-    if (expectedHeight) {
-        if (isNaN(expectedHeight) || Math.abs(node.scrollHeight - expectedHeight) >= 1)
-            failures.push("Expected " + expectedHeight + " for scrollHeight, but got " + node.scrollHeight + ". ");
-    }
-
-    var expectedOffset = checkAttribute(output, node, "data-total-x");
-    if (expectedOffset) {
-        var totalLeft = node.clientLeft + node.offsetLeft;
-        if (isNaN(expectedOffset) || Math.abs(totalLeft - expectedOffset) >= 1)
-            failures.push("Expected " + expectedOffset + " for clientLeft+offsetLeft, but got " + totalLeft + ", clientLeft: " + node.clientLeft + ", offsetLeft: " + node.offsetLeft + ". ");
-    }
-
-    var expectedOffset = checkAttribute(output, node, "data-total-y");
-    if (expectedOffset) {
-        var totalTop = node.clientTop + node.offsetTop;
-        if (isNaN(expectedOffset) || Math.abs(totalTop - expectedOffset) >= 1)
-            failures.push("Expected " + expectedOffset + " for clientTop+offsetTop, but got " + totalTop + ", clientTop: " + node.clientTop + ", + offsetTop: " + node.offsetTop + ". ");
-    }
-
-    var expectedDisplay = checkAttribute(output, node, "data-expected-display");
-    if (expectedDisplay) {
-        var actualDisplay = getComputedStyle(node).display;
-        if (actualDisplay != expectedDisplay)
-            failures.push("Expected " + expectedDisplay + " for display, but got " + actualDisplay + ". ");
-    }
-
-    var expectedPaddingTop = checkAttribute(output, node, "data-expected-padding-top");
-    if (expectedPaddingTop) {
-        var actualPaddingTop = getComputedStyle(node).paddingTop;
-        // Trim the unit "px" from the output.
-        actualPaddingTop = actualPaddingTop.substring(0, actualPaddingTop.length - 2);
-        if (actualPaddingTop != expectedPaddingTop)
-            failures.push("Expected " + expectedPaddingTop + " for padding-top, but got " + actualPaddingTop + ". ");
-    }
-
-    var expectedPaddingBottom = checkAttribute(output, node, "data-expected-padding-bottom");
-    if (expectedPaddingBottom) {
-        var actualPaddingBottom = getComputedStyle(node).paddingBottom;
-        // Trim the unit "px" from the output.
-        actualPaddingBottom = actualPaddingBottom.substring(0, actualPaddingBottom.length - 2);
-        if (actualPaddingBottom != expectedPaddingBottom)
-            failures.push("Expected " + expectedPaddingBottom + " for padding-bottom, but got " + actualPaddingBottom + ". ");
-    }
-
-    var expectedPaddingLeft = checkAttribute(output, node, "data-expected-padding-left");
-    if (expectedPaddingLeft) {
-        var actualPaddingLeft = getComputedStyle(node).paddingLeft;
-        // Trim the unit "px" from the output.
-        actualPaddingLeft = actualPaddingLeft.substring(0, actualPaddingLeft.length - 2);
-        if (actualPaddingLeft != expectedPaddingLeft)
-            failures.push("Expected " + expectedPaddingLeft + " for padding-left, but got " + actualPaddingLeft + ". ");
-    }
-
-    var expectedPaddingRight = checkAttribute(output, node, "data-expected-padding-right");
-    if (expectedPaddingRight) {
-        var actualPaddingRight = getComputedStyle(node).paddingRight;
-        // Trim the unit "px" from the output.
-        actualPaddingRight = actualPaddingRight.substring(0, actualPaddingRight.length - 2);
-        if (actualPaddingRight != expectedPaddingRight)
-            failures.push("Expected " + expectedPaddingRight + " for padding-right, but got " + actualPaddingRight + ". ");
-    }
-
-    var expectedMarginTop = checkAttribute(output, node, "data-expected-margin-top");
-    if (expectedMarginTop) {
-        var actualMarginTop = getComputedStyle(node).marginTop;
-        // Trim the unit "px" from the output.
-        actualMarginTop = actualMarginTop.substring(0, actualMarginTop.length - 2);
-        if (actualMarginTop != expectedMarginTop)
-            failures.push("Expected " + expectedMarginTop + " for margin-top, but got " + actualMarginTop + ". ");
-    }
-
-    var expectedMarginBottom = checkAttribute(output, node, "data-expected-margin-bottom");
-    if (expectedMarginBottom) {
-        var actualMarginBottom = getComputedStyle(node).marginBottom;
-        // Trim the unit "px" from the output.
-        actualMarginBottom = actualMarginBottom.substring(0, actualMarginBottom.length - 2);
-        if (actualMarginBottom != expectedMarginBottom)
-            failures.push("Expected " + expectedMarginBottom + " for margin-bottom, but got " + actualMarginBottom + ". ");
-    }
-
-    var expectedMarginLeft = checkAttribute(output, node, "data-expected-margin-left");
-    if (expectedMarginLeft) {
-        var actualMarginLeft = getComputedStyle(node).marginLeft;
-        // Trim the unit "px" from the output.
-        actualMarginLeft = actualMarginLeft.substring(0, actualMarginLeft.length - 2);
-        if (actualMarginLeft != expectedMarginLeft)
-            failures.push("Expected " + expectedMarginLeft + " for margin-left, but got " + actualMarginLeft + ". ");
-    }
-
-    var expectedMarginRight = checkAttribute(output, node, "data-expected-margin-right");
-    if (expectedMarginRight) {
-        var actualMarginRight = getComputedStyle(node).marginRight;
-        // Trim the unit "px" from the output.
-        actualMarginRight = actualMarginRight.substring(0, actualMarginRight.length - 2);
-        if (actualMarginRight != expectedMarginRight)
-            failures.push("Expected " + expectedMarginRight + " for margin-right, but got " + actualMarginRight + ". ");
-    }
-
-    return output.checked;
-}
-
-window.checkLayout = function(selectorList, outputContainer)
-{
-    var result = true;
-    if (!selectorList) {
-        document.body.appendChild(document.createTextNode("You must provide a CSS selector of nodes to check."));
-        return;
-    }
-    var nodes = document.querySelectorAll(selectorList);
-    nodes = Array.prototype.slice.call(nodes);
-    nodes.reverse();
-    var checkedLayout = false;
-    Array.prototype.forEach.call(nodes, function(node) {
-        var failures = [];
-        checkedLayout |= checkExpectedValues(node.parentNode, failures);
-        checkedLayout |= checkSubtreeExpectedValues(node, failures);
-
-        var container = node.parentNode.className == 'container' ? node.parentNode : node;
-
-        var pre = document.createElement('pre');
-        if (failures.length) {
-            pre.className = 'FAIL';
-            result = false;
-        }
-        pre.appendChild(document.createTextNode(failures.length ? "FAIL:\n" + failures.join('\n') + '\n\n' + container.outerHTML : "PASS"));
-
-        var referenceNode = container;
-        if (outputContainer) {
-            if (!outputContainer.lastChild) {
-                // Inserting a text node so we have something to insertAfter.
-                outputContainer.textContent = " ";
-            }
-            referenceNode = outputContainer.lastChild;
-        }
-        insertAfter(pre, referenceNode);
-    });
-
-    if (!checkedLayout) {
-        document.body.appendChild(document.createTextNode("FAIL: No valid data-* attributes found in selector list : " + selectorList));
-        return false;
-    }
-
-    return result;
-}
-
-})();
diff --git a/test/fixtures/wpt/resources/out-of-scope-test.js b/test/fixtures/wpt/resources/out-of-scope-test.js
new file mode 100644
index 00000000000..ce24124646d
--- /dev/null
+++ b/test/fixtures/wpt/resources/out-of-scope-test.js
@@ -0,0 +1,5 @@
+// Testing that the resolution is correct using `resolve`, as you can't import
+// the same module twice.
+window.outscope_test_result = import.meta.resolve("a");
+window.outscope_test_result2 = import.meta.resolve("../resources/log.sub.js?name=E");
+
diff --git a/test/fixtures/wpt/resources/testharness.js b/test/fixtures/wpt/resources/testharness.js
index 7fd5336bf34..04c65eb2e9d 100644
--- a/test/fixtures/wpt/resources/testharness.js
+++ b/test/fixtures/wpt/resources/testharness.js
@@ -2032,30 +2032,46 @@
 
 
     /**
-     * Assert that ``object`` has a property named ``property_name`` and that the property is readonly.
+     * Assert that ``object`` has a property named ``property_name`` and that the property is not writable or has no setter.
      *
-     * Note: The implementation tries to update the named property, so
-     * any side effects of updating will be triggered. Users are
-     * encouraged to instead inspect the property descriptor of ``property_name`` on ``object``.
-     *
-     * @param {Object} object - Object that should have the given property in its prototype chain.
+     * @param {Object} object - Object that should have the given (not necessarily own) property.
      * @param {string} property_name - Expected property name.
      * @param {string} [description] - Description of the condition being tested.
      */
     function assert_readonly(object, property_name, description)
     {
-         var initial_value = object[property_name];
-         try {
-             //Note that this can have side effects in the case where
-             //the property has PutForwards
-             object[property_name] = initial_value + "a"; //XXX use some other value here?
-             assert(same_value(object[property_name], initial_value),
-                    "assert_readonly", description,
-                    "changing property ${p} succeeded",
-                    {p:property_name});
-         } finally {
-             object[property_name] = initial_value;
-         }
+        assert(property_name in object,
+               "assert_readonly", description,
+               "property ${p} not found",
+               {p:property_name});
+
+        let desc;
+        while (object && (desc = Object.getOwnPropertyDescriptor(object, property_name)) === undefined) {
+            object = Object.getPrototypeOf(object);
+        }
+
+        assert(desc !== undefined,
+               "assert_readonly", description,
+               "could not find a descriptor for property ${p}",
+               {p:property_name});
+
+        if (desc.hasOwnProperty("value")) {
+            // We're a data property descriptor
+            assert(desc.writable === false, "assert_readonly", description,
+                   "descriptor [[Writable]] expected false got ${actual}", {actual:desc.writable});
+        } else if (desc.hasOwnProperty("get") || desc.hasOwnProperty("set")) {
+            // We're an accessor property descriptor
+            assert(desc.set === undefined, "assert_readonly", description,
+                   "property ${p} is an accessor property with a [[Set]] attribute, cannot test readonly-ness",
+                   {p:property_name});
+        } else {
+            // We're a generic property descriptor
+            // This shouldn't happen, because Object.getOwnPropertyDescriptor
+            // forwards the return value of [[GetOwnProperty]] (P), which must
+            // be a fully populated Property Descriptor or Undefined.
+            assert(false, "assert_readonly", description,
+                   "Object.getOwnPropertyDescriptor must return a fully populated property descriptor");
+        }
     }
     expose_assert(assert_readonly, "assert_readonly");
 
diff --git a/test/fixtures/wpt/service-workers/service-worker/resources/local-url-inherit-controller-frame.html b/test/fixtures/wpt/service-workers/service-worker/resources/local-url-inherit-controller-frame.html
index 3a5d9b51e75..e7214827a4c 100644
--- a/test/fixtures/wpt/service-workers/service-worker/resources/local-url-inherit-controller-frame.html
+++ b/test/fixtures/wpt/service-workers/service-worker/resources/local-url-inherit-controller-frame.html
@@ -140,7 +140,8 @@
   let w = new SharedWorker(url);
   return new Promise((resolve, reject) => {
     w.port.onmessage = m => {
-      if (m.data.includes("Error")) {
+      // (null is a valid value when the SharedWorker is not controlled)
+      if (m.data?.includes("Error")) {
         reject(m.data);
         return;
       }
diff --git a/test/fixtures/wpt/service-workers/service-worker/resources/router-rules.js b/test/fixtures/wpt/service-workers/service-worker/resources/router-rules.js
index fdc1c9e0637..71c09e7079c 100644
--- a/test/fixtures/wpt/service-workers/service-worker/resources/router-rules.js
+++ b/test/fixtures/wpt/service-workers/service-worker/resources/router-rules.js
@@ -1,7 +1,4 @@
 const TEST_CACHE_NAME = 'v1';
-// The value is coming from:
-// https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/public/common/service_worker/service_worker_router_rule.h;l=28;drc=6f3f85b321146cfc0f9eb81a74c7c2257821461e
-const CONDITION_MAX_RECURSION_DEPTH = 10;
 
 const routerRules = {
   'condition-urlpattern-constructed-source-network': [{
@@ -60,34 +57,6 @@ const routerRules = {
     condition: {requestMethod: String.fromCodePoint(0x3042)},
     source: 'network'
   }],
-  'condition-invalid-or-condition-depth': (() => {
-    const addOrCondition = (depth) => {
-      if (depth > CONDITION_MAX_RECURSION_DEPTH) {
-        return {urlPattern: '/foo'};
-      }
-      return {
-        or: [addOrCondition(depth + 1)]
-      };
-    };
-    return {condition: addOrCondition(1), source: 'network'};
-  })(),
-  'condition-invalid-not-condition-depth': (() => {
-    const generateNotCondition = (depth) => {
-      if (depth > CONDITION_MAX_RECURSION_DEPTH) {
-        return {
-          urlPattern: '/**/example.txt',
-        };
-      }
-      return {not: generateNotCondition(depth + 1)};
-    };
-    return {condition: generateNotCondition(1), source: 'network'};
-  })(),
-  'condition-invalid-router-size': [...Array(512)].map((val, i) => {
-    return {
-      condition: {urlPattern: `/foo-${i}`},
-      source: 'network'
-    };
-  }),
   'condition-request-destination-script-network':
       [{condition: {requestDestination: 'script'}, source: 'network'}],
   'condition-or-source-network': [{
diff --git a/test/fixtures/wpt/service-workers/service-worker/static-router-invalid-rules.https.html b/test/fixtures/wpt/service-workers/service-worker/static-router-invalid-rules.https.html
index 15b8ef5742d..05f39f2c9dc 100644
--- a/test/fixtures/wpt/service-workers/service-worker/static-router-invalid-rules.https.html
+++ b/test/fixtures/wpt/service-workers/service-worker/static-router-invalid-rules.https.html
@@ -15,12 +15,6 @@
 
 const ROUTER_RULE_KEY_INVALID_REQUEST_METHOD =
     'condition-invalid-request-method';
-const ROUTER_RULE_KEY_INVALID_OR_CONDITION_DEPTH =
-    'condition-invalid-or-condition-depth';
-const ROUTER_RULE_KEY_INVALID_NOT_CONDITION_DEPTH =
-    'condition-invalid-not-condition-depth';
-const ROUTER_RULE_KEY_INVALID_ROUTER_SIZE =
-    'condition-invalid-router-size';
 const ROUTER_RULE_KEY_LACK_OF_CONDITION =
     'condition-lack-of-condition';
 const ROUTER_RULE_KEY_LACK_OF_SOURCE =
@@ -33,27 +27,6 @@
   assert_equals(errors.length, 1);
 }, 'addRoutes should raise for invalid request method.');
 
-promise_test(async t => {
-  const worker = await registerAndActivate(t, ROUTER_RULE_KEY_INVALID_OR_CONDITION_DEPTH);
-  t.add_cleanup(() => {reset_info_in_worker(worker)});
-  const {errors} = await get_info_from_worker(worker);
-  assert_equals(errors.length, 1);
-}, 'addRoutes should raise if or condition exceeds the depth limit');
-
-promise_test(async t => {
-  const worker = await registerAndActivate(t, ROUTER_RULE_KEY_INVALID_NOT_CONDITION_DEPTH);
-  t.add_cleanup(() => {reset_info_in_worker(worker)});
-  const {errors} = await get_info_from_worker(worker);
-  assert_equals(errors.length, 1);
-}, 'addRoutes should raise if not condition exceeds the depth limit');
-
-promise_test(async t => {
-  const worker = await registerAndActivate(t, ROUTER_RULE_KEY_INVALID_ROUTER_SIZE);
-  t.add_cleanup(() => {reset_info_in_worker(worker)});
-  const {errors} = await get_info_from_worker(worker);
-  assert_equals(errors.length, 1);
-}, 'addRoutes should raise if the number of router rules exceeds the length limit');
-
 promise_test(async t => {
   const worker = await registerAndActivate(t, ROUTER_RULE_KEY_LACK_OF_CONDITION);
   t.add_cleanup(() => {reset_info_in_worker(worker)});
diff --git a/test/fixtures/wpt/service-workers/service-worker/tentative/static-router/static-router-resource-timing.https.html b/test/fixtures/wpt/service-workers/service-worker/tentative/static-router/static-router-resource-timing.https.html
index 74d84eb3c9f..e32436da41b 100644
--- a/test/fixtures/wpt/service-workers/service-worker/tentative/static-router/static-router-resource-timing.https.html
+++ b/test/fixtures/wpt/service-workers/service-worker/tentative/static-router/static-router-resource-timing.https.html
@@ -63,6 +63,7 @@
       if (entry.workerFinalSourceType === 'cache') {
         assert_equals(entry.fetchStart, entry.responseStart, description);
         assert_less_than_equal(entry.workerCacheLookupStart, entry.responseStart, description);
+        assert_equals(entry.deliveryType, 'cache-storage', description);
       } else {
         assert_less_than_equal(entry.workerCacheLookupStart, entry.fetchStart, description);
       }
diff --git a/test/fixtures/wpt/storage/quotachange-in-detached-iframe.tentative.https.html b/test/fixtures/wpt/storage/quotachange-in-detached-iframe.tentative.https.html
deleted file mode 100644
index 123af50e3ce..00000000000
--- a/test/fixtures/wpt/storage/quotachange-in-detached-iframe.tentative.https.html
+++ /dev/null
@@ -1,21 +0,0 @@
-<!doctype html>
-<meta charset="utf-8">
-<title>quotachange event on DOMWindow of detached iframe</title>
-<link rel="author" href="jarrydg@chromium.org" title="Jarryd">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<iframe id="iframe"></iframe>
-<script>
-'use strict';
-
-test(t => {
-  const iframe = document.getElementById('iframe');
-  const frameWindow = iframe.contentWindow;
-  const storageManager = frameWindow.navigator.storage;
-
-  iframe.parentNode.removeChild(iframe);
-  const emptyListener = () => {};
-  storageManager.addEventListener('quotachange', emptyListener);
-  storageManager.removeEventListener('quotachange', emptyListener);
-}, "Add quotachange listener on detached iframe.");
-</script>
diff --git a/test/fixtures/wpt/xhr/formdata/constructor-submitter-coordinate.html b/test/fixtures/wpt/xhr/formdata/constructor-submitter-coordinate.html
index 992f64b7217..b7bf128bd12 100644
--- a/test/fixtures/wpt/xhr/formdata/constructor-submitter-coordinate.html
+++ b/test/fixtures/wpt/xhr/formdata/constructor-submitter-coordinate.html
@@ -1,18 +1,21 @@
 <!DOCTYPE html>
 <meta charset='utf-8'>
+<meta name=viewport content='width=device-width,initial-scale=1'>
 <link rel='help' href='https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#constructing-the-form-data-set'>
 <link ref='help' href='https://xhr.spec.whatwg.org/#dom-formdata'>
 <script src='/resources/testharness.js'></script>
 <script src='/resources/testharnessreport.js'></script>
 
 <form>
-  <input type=image src='/media/1x1-green.png'></button>
+  <input type=image src='/images/100px-green-rect.svg'>
 </form>
 
 <script>
 "use strict";
 
-test(() => {
+promise_test(async () => {
+  await new Promise(r => window.addEventListener("load", r));
+
   const form = document.querySelector("form");
   const submitter = form.querySelector("input[type=image]");
 
@@ -23,14 +26,14 @@
   });
 
   const domRect = submitter.getBoundingClientRect();
+  const clientX = Math.round((domRect.left + domRect.right) / 7);
+  const clientY = Math.round((domRect.top + domRect.bottom) / 4);
+
   submitter.dispatchEvent(
-    new MouseEvent("click", {
-      clientX: Math.round(domRect.x) + 1,
-      clientY: Math.round(domRect.y) + 2
-    })
+    new MouseEvent("click", {clientX, clientY})
   );
 
-  assert_equals(formData?.get("x"), "1");
-  assert_equals(formData?.get("y"), "2");
+  assert_equals(formData?.get("x"), "23");
+  assert_equals(formData?.get("y"), "46");
 }, "The constructed FormData object should contain correct entries for Image Button submitter's dispatched coordinate");
 </script>
diff --git a/test/fixtures/wpt/xhr/formdata/submitter-coordinate-value.html b/test/fixtures/wpt/xhr/formdata/submitter-coordinate-value.html
new file mode 100644
index 00000000000..69bea0ac3f9
--- /dev/null
+++ b/test/fixtures/wpt/xhr/formdata/submitter-coordinate-value.html
@@ -0,0 +1,55 @@
+<!doctype html>
+<meta charset="utf-8">
+<meta name=viewport content="width=device-width,initial-scale=1">
+<title>Test image button coordinates</title>
+<link rel="help" href="https://html.spec.whatwg.org/multipage/input.html#image-button-state-(type=image)">
+<link rel="help" href="https://xhr.spec.whatwg.org/#dom-formdata">
+<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=282266">
+<link rel="author" title="Zach Hoffman" href="mailto:zach@zrhoffman.net">
+<form id="myForm" onsubmit="return false;">
+  <input id="myImage" name="myImage" type="image" src="/images/100px-green-rect.svg">
+</form>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<script>
+promise_test(async t => {
+  await new Promise(r => window.addEventListener("load", r));
+
+  const xCoordinates = [];
+  const yCoordinates = [];
+
+  let formData;
+  myForm.addEventListener("submit", t.step_func(e => {
+    e.preventDefault();
+    formData = new FormData(myForm, myImage);
+    xCoordinates.push(formData.get("myImage.x"));
+    yCoordinates.push(formData.get("myImage.y"));
+  }));
+
+  await test_driver.click(myImage);
+
+  const [clientX, clientY] = getInViewCenterPoint(myImage.getBoundingClientRect());
+  const mouseEvent = new MouseEvent("click", {clientX, clientY});
+  myImage.dispatchEvent(mouseEvent);
+
+  assert_equals(xCoordinates.length, 2, "there should be 2 X coordinates");
+  assert_equals(yCoordinates.length, 2, "there should be 2 Y coordinates");
+  assert_equals(xCoordinates[1], xCoordinates[0], "dispatched event X coordinate should match user intention X coordinate");
+  assert_equals(yCoordinates[1], yCoordinates[0], "dispatched event Y coordinate should match user intention Y coordinate");
+}, "dispatched event coordinates should match user intention coordinates")
+
+// Private function from testdriver.js.
+function getInViewCenterPoint(rect) {
+  var left = Math.max(0, rect.left);
+  var right = Math.min(window.innerWidth, rect.right);
+  var top = Math.max(0, rect.top);
+  var bottom = Math.min(window.innerHeight, rect.bottom);
+
+  var x = 0.5 * (left + right);
+  var y = 0.5 * (top + bottom);
+
+  return [x, y];
+}
+</script>