diff --git a/cobalt/android/apk/app/src/main/java/dev/cobalt/coat/CommandLineOverrideHelper.java b/cobalt/android/apk/app/src/main/java/dev/cobalt/coat/CommandLineOverrideHelper.java
index 35836b131886..57f4348b5ef7 100644
--- a/cobalt/android/apk/app/src/main/java/dev/cobalt/coat/CommandLineOverrideHelper.java
+++ b/cobalt/android/apk/app/src/main/java/dev/cobalt/coat/CommandLineOverrideHelper.java
@@ -59,8 +59,6 @@ public static List<String> getDefaultCommandLineOverridesList() {
         paramOverrides.add("--force-video-overlays");
         // Autoplay video with url.
         paramOverrides.add("--autoplay-policy=no-user-gesture-required");
-        // Remove below if Cobalt rebase to m120+.
-        paramOverrides.add("--user-level-memory-pressure-signal-params");
         // Disable rescaling Webpage.
         paramOverrides.add("--force-device-scale-factor=1");
         // Enable low end device mode.
@@ -75,9 +73,6 @@ public static List<String> getDefaultCommandLineOverridesList() {
         paramOverrides.add("--disable-accelerated-video-encode");
         // Rasterize Tiles directly to GPU memory.
         paramOverrides.add("--enable-zero-copy");
-        // Disable QUIC to save CPU budgets on m114.
-        // Remove below if Cobalt rebase to m138+.
-        paramOverrides.add("--disable-quic");
 
         return paramOverrides;
     }
@@ -117,9 +112,6 @@ public static StringJoiner getDefaultDisableFeatureOverridesList() {
     public static StringJoiner getDefaultBlinkEnableFeatureOverridesList() {
         StringJoiner paramOverrides = new StringJoiner(",");
 
-        // Align with MSE spec for MediaSource.duration.
-        paramOverrides.add("MediaSourceNewAbortAndDuration");
-
         // Enable precise memory info so we can make accurate client-side
         // measurements.
         paramOverrides.add("PreciseMemoryInfo");
diff --git a/cobalt/android/apk/app/src/test/java/dev/cobalt/coat/CommandLineOverrideHelperTest.java b/cobalt/android/apk/app/src/test/java/dev/cobalt/coat/CommandLineOverrideHelperTest.java
index 43910b73d4ca..4b70af158f5b 100644
--- a/cobalt/android/apk/app/src/test/java/dev/cobalt/coat/CommandLineOverrideHelperTest.java
+++ b/cobalt/android/apk/app/src/test/java/dev/cobalt/coat/CommandLineOverrideHelperTest.java
@@ -63,7 +63,6 @@ public void testDefaultDisableFeatureOverridesList() {
     public void testDefaultBlinkEnableFeatureOverridesList() {
         String overrides =
             CommandLineOverrideHelper.getDefaultBlinkEnableFeatureOverridesList().toString();
-        assertThat(overrides.contains("MediaSourceNewAbortAndDuration")).isTrue();
         assertThat(overrides.contains("PreciseMemoryInfo")).isTrue();
     }
 
@@ -73,8 +72,6 @@ public void testFlagOverrides_NullParam() {
 
         Assert.assertTrue(CommandLine.getInstance().hasSwitch("single-process"));
         Assert.assertTrue(CommandLine.getInstance().hasSwitch("force-video-overlays"));
-        Assert.assertTrue(
-            CommandLine.getInstance().hasSwitch("user-level-memory-pressure-signal-params"));
         Assert.assertTrue(CommandLine.getInstance().hasSwitch("enable-low-end-device-mode"));
         Assert.assertTrue(CommandLine.getInstance().hasSwitch("disable-rgba-4444-textures"));
         Assert.assertTrue(CommandLine.getInstance().hasSwitch("disable-accelerated-video-decode"));
diff --git a/cobalt/app/cobalt_switch_defaults_starboard.cc b/cobalt/app/cobalt_switch_defaults_starboard.cc
index 1d920cc26463..1f70a4519ce4 100644
--- a/cobalt/app/cobalt_switch_defaults_starboard.cc
+++ b/cobalt/app/cobalt_switch_defaults_starboard.cc
@@ -43,39 +43,32 @@ namespace {
 
 // List of toggleable default switches.
 static constexpr auto kCobaltToggleSwitches = std::to_array<const char*>({
-  // Enable Blink to work in overlay video mode
-  switches::kForceVideoOverlays,
-      // Disable multiprocess mode.
-      switches::kSingleProcess,
-      // Hide content shell toolbar.
-      switches::kContentShellHideToolbar,
-      // Accelerated GL is blanket disabled for Linux. Ignore the GPU blocklist
-      // to enable it.
-      switches::kIgnoreGpuBlocklist,
-#if BUILDFLAG(IS_ANDROID)
-      // This flag is added specifically for m114 and should be removed after
-      // rebasing to m120+
-      switches::kUserLevelMemoryPressureSignalParams,
-#endif  // BUILDFLAG(IS_ANDROID)
-      // Disable Zygote (a process fork utility); in turn needs sandbox
-      // disabled.
-      switches::kNoZygote, sandbox::policy::switches::kNoSandbox,
-      // Rasterize Tiles directly to GPU memory (ZeroCopyRasterBufferProvider).
-      blink::switches::kEnableZeroCopy,
-      // Enable low-end device mode. This comes with a load of memory and CPU
-      // saving goodies but can degrade the experience considerably. One of the
-      // known regressions is 4444 textures, which are then disabled explicitly.
-      switches::kEnableLowEndDeviceMode,
-      blink::switches::kDisableRGBA4444Textures,
-      // For Starboard the signal handlers are already setup. Disable the
-      // Chromium registrations to avoid overriding the Starboard ones.
-      switches::kDisableInProcessStackTraces,
-      // Cobalt doesn't use Chrome's accelerated video decoding/encoding.
-      switches::kDisableAcceleratedVideoDecode,
-      switches::kDisableAcceleratedVideoEncode,
-      // Disable QUIC to save CPU budgets on m114.
-      // Remove below if Cobalt rebase to m138+.
-      switches::kDisableQuic,
+    // Enable Blink to work in overlay video mode
+    switches::kForceVideoOverlays,
+    // Disable multiprocess mode.
+    switches::kSingleProcess,
+    // Hide content shell toolbar.
+    switches::kContentShellHideToolbar,
+    // Accelerated GL is blanket disabled for Linux. Ignore the GPU blocklist
+    // to enable it.
+    switches::kIgnoreGpuBlocklist,
+    // Disable Zygote (a process fork utility); in turn needs sandbox
+    // disabled.
+    switches::kNoZygote,
+    sandbox::policy::switches::kNoSandbox,
+    // Rasterize Tiles directly to GPU memory (ZeroCopyRasterBufferProvider).
+    blink::switches::kEnableZeroCopy,
+    // Enable low-end device mode. This comes with a load of memory and CPU
+    // saving goodies but can degrade the experience considerably. One of the
+    // known regressions is 4444 textures, which are then disabled explicitly.
+    switches::kEnableLowEndDeviceMode,
+    blink::switches::kDisableRGBA4444Textures,
+    // For Starboard the signal handlers are already setup. Disable the
+    // Chromium registrations to avoid overriding the Starboard ones.
+    switches::kDisableInProcessStackTraces,
+    // Cobalt doesn't use Chrome's accelerated video decoding/encoding.
+    switches::kDisableAcceleratedVideoDecode,
+    switches::kDisableAcceleratedVideoEncode,
 });
 
 // Map of switches with parameters and their defaults.
@@ -103,11 +96,9 @@ const base::CommandLine::SwitchMap GetCobaltParamSwitchDefaults() {
         // kEnableLowEndDeviceMode sets MSAA to 4 (and not 8, the default). But
         // we set it explicitly just in case.
         {blink::switches::kGpuRasterizationMSAASampleCount, "4"},
-        // Align with MSE spec for MediaSource.duration;
-        // enable precise memory info so we can make accurate client-side
+        // Enable precise memory info so we can make accurate client-side
         // measurements.
-        {switches::kEnableBlinkFeatures,
-         "MediaSourceNewAbortAndDuration, PreciseMemoryInfo"},
+        {switches::kEnableBlinkFeatures, "PreciseMemoryInfo"},
         // Enable autoplay video/audio, as Cobalt may launch directly into media
         // playback before user interaction.
         {switches::kAutoplayPolicy, "no-user-gesture-required"},