diff --git a/src/third_party/blink/common/features.cc b/src/third_party/blink/common/features.cc
index 255115c2..0c4f2d9c 100644
--- a/src/third_party/blink/common/features.cc
+++ b/src/third_party/blink/common/features.cc
@@ -305,7 +305,7 @@ bool IsFencedFramesShadowDOMBased() {
 }
 
 const base::Feature kInitialNavigationEntry{"InitialNavigationEntry",
-                                            base::FEATURE_DISABLED_BY_DEFAULT};
+                                            base::FEATURE_ENABLED_BY_DEFAULT};
 
 bool IsInitialNavigationEntryEnabled() {
   return base::FeatureList::IsEnabled(blink::features::kInitialNavigationEntry);
@@ -959,7 +959,7 @@ const base::FeatureParam<std::string>
 const base::Feature kSanitizerAPI{"SanitizerAPI",
                                   base::FEATURE_DISABLED_BY_DEFAULT};
 const base::Feature kSanitizerAPIv0{"SanitizerAPIv0",
-                                    base::FEATURE_DISABLED_BY_DEFAULT};
+                                    base::FEATURE_ENABLED_BY_DEFAULT};
 
 // Controls whether the Sanitizer API allows namespaced content (SVG + MathML).
 //
@@ -1425,6 +1425,9 @@ const base::Feature kReduceUserAgentMinorVersion{
 const base::FeatureParam<std::string> kUserAgentFrozenBuildVersion{
     &kReduceUserAgentMinorVersion, "build_version", "0"};
 
+const base::Feature kReduceUserAgentPlatformOsCpu{
+    "ReduceUserAgentPlatformOsCpu", base::FEATURE_DISABLED_BY_DEFAULT};
+
 const base::Feature kReportFCPOnlyOnSuccessfulCommit{
     "ReportFCPOnlyOnSuccessfulCommit", base::FEATURE_DISABLED_BY_DEFAULT};
 
@@ -1475,13 +1478,28 @@ const base::Feature kEstablishGpuChannelAsync{
 const base::Feature kDecodeScriptSourceOffThread{
     "DecodeScriptSourceOffThread", base::FEATURE_DISABLED_BY_DEFAULT};
 
+const base::Feature kDelayAsyncScriptExecution{
+    "DelayAsyncScriptExecution", base::FEATURE_DISABLED_BY_DEFAULT};
+
+const base::FeatureParam<DelayAsyncScriptDelayType>::Option
+    delay_async_script_execution_delay_types[] = {
+        {DelayAsyncScriptDelayType::kFinishedParsing, "finished_parsing"},
+        {DelayAsyncScriptDelayType::kFirstPaintOrFinishedParsing,
+         "first_paint_or_finished_parsing"}};
+
+const base::FeatureParam<DelayAsyncScriptDelayType>
+    kDelayAsyncScriptExecutionDelayParam{
+        &kDelayAsyncScriptExecution, "delay_type",
+        DelayAsyncScriptDelayType::kFinishedParsing,
+        &delay_async_script_execution_delay_types};
+
+const base::Feature kForceDeferScriptIntervention{
+    "ForceDeferScriptIntervention", base::FEATURE_DISABLED_BY_DEFAULT};
+
 const base::Feature kAllowSourceSwitchOnPausedVideoMediaStream{
     "AllowSourceSwitchOnPausedVideoMediaStream",
     base::FEATURE_ENABLED_BY_DEFAULT};
 
-const base::Feature kDispatchPopstateSync{"DispatchPopstateSync",
-                                          base::FEATURE_ENABLED_BY_DEFAULT};
-
 // Exposes non-standard stats in the WebRTC getStats() API.
 const base::Feature kWebRtcExposeNonStandardStats{
     "WebRtc-ExposeNonStandardStats", base::FEATURE_DISABLED_BY_DEFAULT};
@@ -1522,9 +1540,6 @@ const base::Feature kFileSystemUrlNavigation{"FileSystemUrlNavigation",
 const base::Feature kEarlyExitOnNoopClassOrStyleChange{
     "EarlyExitOnNoopClassOrStyleChange", base::FEATURE_DISABLED_BY_DEFAULT};
 
-const base::Feature kLocalFrameRootPrePostFCPMetrics{
-    "LocalFrameRootPrePostFCPMetrics", base::FEATURE_DISABLED_BY_DEFAULT};
-
 // TODO(mahesh.ma): Enable for supported Android versions once feature is ready.
 const base::Feature kStylusWritingToInput{"StylusWritingToInput",
                                           base::FEATURE_DISABLED_BY_DEFAULT};
@@ -1539,5 +1554,8 @@ const base::Feature kTimedHTMLParserBudget{"TimedHTMLParserBudget",
 const base::Feature kCSSOverflowForReplacedElements{
     "CSSOverflowForReplacedElements", base::FEATURE_ENABLED_BY_DEFAULT};
 
+const base::Feature kClipboardUnsanitizedContent{
+    "ClipboardUnsanitizedContent", base::FEATURE_DISABLED_BY_DEFAULT};
+
 }  // namespace features
 }  // namespace blink