diff -up chromium-122.0.6261.29/media/base/media_switches.cc.disable-FFmpegAllowLists chromium-122.0.6261.29/media/base/media_switches.cc
--- chromium-122.0.6261.29/media/base/media_switches.cc.disable-FFmpegAllowLists	2024-02-12 15:56:50.703196471 +0100
+++ chromium-122.0.6261.29/media/base/media_switches.cc	2024-02-12 17:08:42.266076401 +0100
@@ -1753,7 +1753,7 @@
 // Enables FFmpeg allow lists for supported codecs / containers.
 BASE_FEATURE(kFFmpegAllowLists,
              "FFmpegAllowLists",
-             base::FEATURE_ENABLED_BY_DEFAULT);
+             base::FEATURE_DISABLED_BY_DEFAULT);
 
 #if BUILDFLAG(IS_WIN)
 // Enables audio offload when supported by endpoints.