diff --git a/args.gn b/args.gn
index b32fda9f..ae9d506f 100644
--- a/args.gn
+++ b/args.gn
@@ -36,6 +36,7 @@ v8_enable_fast_torque = true
 v8_enable_builtins_optimization = true
 v8_enable_maglev = true
 v8_enable_turbofan = true
+v8_enable_wasm_simd256_revec = true
 use_v8_context_snapshot = true
 blink_symbol_level = 0
 enable_precompiled_headers = false
diff --git a/arm/android/android_ARM32_args.gn b/arm/android/android_ARM32_args.gn
index 8cf35acd..cb375971 100644
--- a/arm/android/android_ARM32_args.gn
+++ b/arm/android/android_ARM32_args.gn
@@ -66,7 +66,7 @@ enable_cros_media_app = false
 proprietary_codecs = true
 ffmpeg_branding = "Chrome"
 clang_use_chrome_plugins = true
-enable_ffmpeg_video_decoders = false
+enable_ffmpeg_video_decoders = true
 is_component_ffmpeg = false
 use_webaudio_ffmpeg = false
 use_webaudio_pffft = true
diff --git a/arm/android/android_ARM64_args.gn b/arm/android/android_ARM64_args.gn
index bd87ff71..4dddcaaf 100644
--- a/arm/android/android_ARM64_args.gn
+++ b/arm/android/android_ARM64_args.gn
@@ -14,23 +14,23 @@ arm_optionally_use_neon = false
 arm_fpu = "neon"
 is_official_build = true
 is_high_end_android = true
-use_relr_relocations = true
+use_relr_relocations = false
 optimize_for_size = false
 # optimize_for_speed = true
 is_debug = false
 is_java_debug = false
 debuggable_apks = false
-is_cfi = true
+# is_cfi = true
 use_relative_vtables_abi = false
 icu_use_data_file = true
-use_cfi_cast = true
+# use_cfi_cast = true
 v8_use_external_startup_data = true
 android_channel = "stable"
 disable_android_lint = true
 enable_stripping = true
 strip_debug_info = true
 dcheck_always_on = false
-exclude_unwind_tables = false
+exclude_unwind_tables = true
 # enable_debugallocation = false
 enable_iterator_debugging = false
 disable_fieldtrial_testing_config = true
@@ -50,10 +50,10 @@ webview_includes_weblayer = true
 use_lld = true
 v8_symbol_level = 0
 v8_enable_fast_torque = true
-use_v8_context_snapshot = false
 v8_enable_builtins_optimization = true
 v8_enable_maglev = true
 v8_enable_turbofan = true
+use_v8_context_snapshot = false
 blink_symbol_level = 0
 enable_precompiled_headers = false
 media_use_ffmpeg = true
diff --git a/arm/build/config/compiler/BUILD.gn b/arm/build/config/compiler/BUILD.gn
index dd7c93bd..b82dabe8 100644
--- a/arm/build/config/compiler/BUILD.gn
+++ b/arm/build/config/compiler/BUILD.gn
@@ -2218,7 +2218,7 @@ if (is_win) {
   }
 
   if (current_cpu == "arm64") {
-    common_optimize_on_cflags += [ "-march=armv8-a", ]
+    common_optimize_on_cflags += [ "-march=armv8-a+simd", ]
   }
 
   common_optimize_on_cflags += [
diff --git a/other/AVX2/win_AVX2_args.gn b/other/AVX2/win_AVX2_args.gn
index cf4057f7..a6c427b0 100644
--- a/other/AVX2/win_AVX2_args.gn
+++ b/other/AVX2/win_AVX2_args.gn
@@ -32,6 +32,7 @@ v8_enable_fast_torque = true
 v8_enable_builtins_optimization = true
 v8_enable_maglev = true
 v8_enable_turbofan = true
+v8_enable_wasm_simd256_revec = true
 use_v8_context_snapshot = true
 enable_nacl = false
 blink_symbol_level = 0
diff --git a/other/SSE3/win_SSE3_args.gn b/other/SSE3/win_SSE3_args.gn
index 237ac716..085062c1 100644
--- a/other/SSE3/win_SSE3_args.gn
+++ b/other/SSE3/win_SSE3_args.gn
@@ -32,6 +32,7 @@ v8_enable_fast_torque = true
 v8_enable_builtins_optimization = true
 v8_enable_maglev = true
 v8_enable_turbofan = true
+v8_enable_wasm_simd256_revec = true
 use_v8_context_snapshot = true
 blink_symbol_level = 0
 enable_precompiled_headers = false
diff --git a/src/build/config/android/BUILD.gn b/src/build/config/android/BUILD.gn
index 53609939..4050fa3e 100644
--- a/src/build/config/android/BUILD.gn
+++ b/src/build/config/android/BUILD.gn
@@ -71,8 +71,8 @@ config("compiler") {
   ldflags += [ "--target=$android_abi_target$compile_api_level" ]
 
   if (current_cpu == "arm64") {
-    cflags += [ "-march=armv8-a" ]
-    ldflags += [ "-march=armv8-a" ]
+    cflags += [ "-march=armv8-a+simd" ]
+    ldflags += [ "-march=armv8-a+simd" ]
   }
 
   if (current_cpu == "arm") {
diff --git a/win_args.gn b/win_args.gn
index a75661f5..2f1b63eb 100644
--- a/win_args.gn
+++ b/win_args.gn
@@ -32,6 +32,7 @@ v8_enable_fast_torque = true
 v8_enable_builtins_optimization = true
 v8_enable_maglev = true
 v8_enable_turbofan = true
+v8_enable_wasm_simd256_revec = true
 use_v8_context_snapshot = true
 blink_symbol_level = 0
 enable_precompiled_headers = false