diff --git a/dom/media/MediaDecoder.cpp b/dom/media/MediaDecoder.cpp
index 84836a87798a..2dbeb5b90649 100644
--- a/dom/media/MediaDecoder.cpp
+++ b/dom/media/MediaDecoder.cpp
@@ -126,33 +126,6 @@ void MediaDecoder::InitStatics() {
   MOZ_ASSERT(NS_IsMainThread());
   // Eagerly init gMediaDecoderLog to work around bug 1415441.
   MOZ_LOG(gMediaDecoderLog, LogLevel::Info, ("MediaDecoder::InitStatics"));
-
-#if defined(NIGHTLY_BUILD)
-  // Allow people to force a bit but try to warn them about filing bugs if audio
-  // decoding does not work on utility
-  static const bool allowLockPrefs =
-      PR_GetEnv("MOZ_DONT_LOCK_UTILITY_PLZ_FILE_A_BUG") == nullptr;
-  if (XRE_IsParentProcess() && allowLockPrefs) {
-    // Lock Utility process preferences so that people cannot opt-out of
-    // Utility process
-    Preferences::Lock("media.utility-process.enabled");
-#  if defined(MOZ_FFMPEG)
-    Preferences::Lock("media.utility-ffmpeg.enabled");
-#  endif  // defined(MOZ_FFMPEG)
-#  if defined(MOZ_FFVPX)
-    Preferences::Lock("media.utility-ffvpx.enabled");
-#  endif  // defined(MOZ_FFVPX)
-#  if defined(MOZ_WMF)
-    Preferences::Lock("media.utility-wmf.enabled");
-#  endif  // defined(MOZ_WMF)
-#  if defined(MOZ_APPLEMEDIA)
-    Preferences::Lock("media.utility-applemedia.enabled");
-#  endif  // defined(MOZ_APPLEMEDIA)
-    Preferences::Lock("media.utility-vorbis.enabled");
-    Preferences::Lock("media.utility-wav.enabled");
-    Preferences::Lock("media.utility-opus.enabled");
-  }
-#endif  // defined(NIGHTLY_BUILD)
 }
 
 NS_IMPL_ISUPPORTS(MediaMemoryTracker, nsIMemoryReporter)
diff --git a/ipc/glue/test/browser/browser.ini b/ipc/glue/test/browser/browser.ini
index aa8ef3b3bb90..00cb64e05451 100644
--- a/ipc/glue/test/browser/browser.ini
+++ b/ipc/glue/test/browser/browser.ini
@@ -1,9 +1,5 @@
 [DEFAULT]
 support-files = head.js
-# Set this since we want to continue monitoring the disabling of pref since we
-# still allow it a little bit.
-environment =
-  MOZ_DONT_LOCK_UTILITY_PLZ_FILE_A_BUG=1
 
 [browser_audio_telemetry_content.js]
 skip-if =
diff --git a/ipc/glue/test/browser/browser_audio_fallback.ini b/ipc/glue/test/browser/browser_audio_fallback.ini
index 580060862623..3b5e8555a94b 100644
--- a/ipc/glue/test/browser/browser_audio_fallback.ini
+++ b/ipc/glue/test/browser/browser_audio_fallback.ini
@@ -4,10 +4,6 @@ support-files =
   head-multiple.js
 prefs =
   media.allow-audio-non-utility=true
-# Set this since we want to continue monitoring the disabling of pref since we
-# still allow it a little bit.
-environment =
-  MOZ_DONT_LOCK_UTILITY_PLZ_FILE_A_BUG=1
 
 [browser_utility_multipleAudio_fallback.js]
 support-files =
diff --git a/ipc/glue/test/browser/browser_audio_locked.ini b/ipc/glue/test/browser/browser_audio_locked.ini
deleted file mode 100644
index 7c2ebeda6030..000000000000
--- a/ipc/glue/test/browser/browser_audio_locked.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[DEFAULT]
-
-[browser_utility_audio_locked.js]
diff --git a/ipc/glue/test/browser/browser_utility_audio_locked.js b/ipc/glue/test/browser/browser_utility_audio_locked.js
deleted file mode 100644
index d646e2b725fb..000000000000
--- a/ipc/glue/test/browser/browser_utility_audio_locked.js
+++ /dev/null
@@ -1,24 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
- * http://creativecommons.org/publicdomain/zero/1.0/ */
-
-"use strict";
-
-/* import-globals-from head-multiple.js */
-
-Services.scriptloader.loadSubScript(
-  "chrome://mochitests/content/browser/ipc/glue/test/browser/head-multiple.js",
-  this
-);
-
-add_setup(async function setup() {
-  await SpecialPowers.pushPrefEnv({
-    set: [["media.utility-process.enabled", false]],
-  });
-});
-
-add_task(async function testAudioDecodingInUtility() {
-  // TODO: When getting rid of audio decoding on non utility at all, this
-  // should be removed
-  const verifyForUtility = !!isNightly();
-  await runTest({ expectUtility: verifyForUtility });
-});
diff --git a/ipc/glue/test/browser/moz.build b/ipc/glue/test/browser/moz.build
index 77eb8e593c99..3a08a964496f 100644
--- a/ipc/glue/test/browser/moz.build
+++ b/ipc/glue/test/browser/moz.build
@@ -8,7 +8,6 @@ BROWSER_CHROME_MANIFESTS += [
     "browser.ini",
     "browser_audio_fallback.ini",
     "browser_audio_fallback_content.ini",
-    "browser_audio_locked.ini",
     "browser_audio_shutdown.ini",
     "browser_child_hang.ini",
 ]