--- a/dom/ipc/ContentPrefs.cpp
+++ b/dom/ipc/ContentPrefs.cpp
@@ -125,41 +125,34 @@ const char* mozilla::dom::ContentPrefs::
   "layout.css.servo.chrome.enabled",
   "layout.css.stylo-blocklist.blocked_domains",
   "layout.css.stylo-blocklist.enabled",
 #endif
   "layout.idle_period.required_quiescent_frames",
   "layout.idle_period.time_limit",
   "layout.interruptible-reflow.enabled",
   "mathml.disabled",
-  "media.apple.forcevda",
   "media.clearkey.persistent-license.enabled",
   "media.cubeb.backend",
   "media.cubeb.sandbox",
   "media.cubeb_latency_msg_frames",
   "media.cubeb_latency_playback_ms",
   "media.decoder-doctor.wmf-disabled-is-failure",
-  "media.decoder.fuzzing.dont-delay-inputexhausted",
-  "media.decoder.fuzzing.enabled",
-  "media.decoder.fuzzing.video-output-minimum-interval-ms",
   "media.decoder.limit",
   "media.decoder.recycle.enabled",
   "media.dormant-on-pause-timeout-ms",
   "media.eme.audio.blank",
   "media.eme.enabled",
   "media.eme.video.blank",
   "media.ffmpeg.enabled",
   "media.ffvpx.enabled",
   "media.ffvpx.low-latency.enabled",
   "media.flac.enabled",
   "media.forcestereo.enabled",
-  "media.gmp.async-shutdown-timeout",
-  "media.gmp.decoder.aac",
   "media.gmp.decoder.enabled",
-  "media.gmp.decoder.h264",
   "media.gmp.insecure.allow",
   "media.gpu-process-decoder",
   "media.libavcodec.allow-obsolete",
   "media.num-decode-threads",
   "media.ogg.enabled",
   "media.ogg.flac.enabled",
   "media.resampling.enabled",
   "media.resampling.rate",

--- a/dom/media/MediaPrefs.h
+++ b/dom/media/MediaPrefs.h
@@ -109,17 +109,16 @@ private:
 #endif
   // VideoSink
   DECL_MEDIA_PREF("media.ruin-av-sync.enabled",               RuinAvSync, bool, false);
 
   // Encrypted Media Extensions
   DECL_MEDIA_PREF("media.clearkey.persistent-license.enabled", ClearKeyPersistentLicenseEnabled, bool, false);
 
   // PlatformDecoderModule
-  DECL_MEDIA_PREF("media.apple.forcevda",                     AppleForceVDA, bool, false);
   DECL_MEDIA_PREF("media.gmp.insecure.allow",                 GMPAllowInsecure, bool, false);
   DECL_MEDIA_PREF("media.eme.enabled",                        EMEEnabled, bool, false);
   DECL_MEDIA_PREF("media.use-blank-decoder",                  PDMUseBlankDecoder, bool, false);
   DECL_MEDIA_PREF("media.gpu-process-decoder",                PDMUseGPUDecoder, bool, false);
 #ifdef MOZ_WIDGET_ANDROID
   DECL_MEDIA_PREF("media.android-media-codec.enabled",        PDMAndroidMediaCodecEnabled, bool, false);
   DECL_MEDIA_PREF("media.android-media-codec.preferred",      PDMAndroidMediaCodecPreferred, bool, false);
   DECL_MEDIA_PREF("media.navigator.hardware.vp8_encode.acceleration_remote_enabled", RemoteMediaCodecVP8EncoderEnabled, bool, false);
@@ -138,24 +137,19 @@ private:
 #endif
 #ifdef XP_WIN
   DECL_MEDIA_PREF("media.wmf.enabled",                        PDMWMFEnabled, bool, true);
   DECL_MEDIA_PREF("media.wmf.skip-blacklist",                 PDMWMFSkipBlacklist, bool, false);
   DECL_MEDIA_PREF("media.decoder-doctor.wmf-disabled-is-failure", DecoderDoctorWMFDisabledIsFailure, bool, false);
   DECL_MEDIA_PREF("media.wmf.vp9.enabled",                    PDMWMFVP9DecoderEnabled, bool, true);
   DECL_MEDIA_PREF("media.wmf.decoder.thread-count",           PDMWMFThreadCount, int32_t, -1);
 #endif
-  DECL_MEDIA_PREF("media.decoder.fuzzing.enabled",            PDMFuzzingEnabled, bool, false);
-  DECL_MEDIA_PREF("media.decoder.fuzzing.video-output-minimum-interval-ms", PDMFuzzingInterval, uint32_t, 0);
-  DECL_MEDIA_PREF("media.decoder.fuzzing.dont-delay-inputexhausted", PDMFuzzingDelayInputExhausted, bool, true);
   DECL_MEDIA_PREF("media.decoder.recycle.enabled",            MediaDecoderCheckRecycling, bool, false);
   DECL_MEDIA_PREF("media.decoder.skip-to-next-key-frame.enabled", MFRSkipToNextKeyFrameEnabled, bool, true);
   DECL_MEDIA_PREF("media.gmp.decoder.enabled",                PDMGMPEnabled, bool, true);
-  DECL_MEDIA_PREF("media.gmp.decoder.aac",                    GMPAACPreferred, uint32_t, 0);
-  DECL_MEDIA_PREF("media.gmp.decoder.h264",                   GMPH264Preferred, uint32_t, 0);
   DECL_MEDIA_PREF("media.eme.audio.blank",                    EMEBlankAudio, bool, false);
   DECL_MEDIA_PREF("media.eme.video.blank",                    EMEBlankVideo, bool, false);
   DECL_MEDIA_PREF("media.eme.chromium-api.video-shmems",
                   EMEChromiumAPIVideoShmemCount,
                   uint32_t,
                   3);
 
   // MediaDecoderStateMachine