--- a/browser/app/profile/firefox.js
+++ b/browser/app/profile/firefox.js
@@ -1919,13 +1919,8 @@ pref("reader.parse-node-limit", 0);
 pref("browser.pocket.enabled", true);
 pref("browser.pocket.api", "api.getpocket.com");
 pref("browser.pocket.site", "getpocket.com");
 pref("browser.pocket.oAuthConsumerKey", "40249-e88c401e1b1f2242d9e441c4");
 pref("browser.pocket.useLocaleList", true);
 pref("browser.pocket.enabledLocales", "en-US de es-ES ja ja-JP-mac ru");
 
 pref("view_source.tab", true);
-
-// Enable Service Workers for desktop on non-release builds
-#ifndef RELEASE_BUILD
-pref("dom.serviceWorkers.enabled", true);
-#endif

--- a/mobile/android/app/mobile.js
+++ b/mobile/android/app/mobile.js
@@ -911,13 +911,8 @@ pref("touchcaret.extendedvisibility", tr
 pref("caret.manages-android-actionbar", true);
 
 // Disable sending console to logcat on release builds.
 #ifdef RELEASE_BUILD
 pref("consoleservice.logcat", false);
 #else
 pref("consoleservice.logcat", true);
 #endif
-
-// Enable Service Workers for Android on non-release builds
-#ifndef RELEASE_BUILD
-pref("dom.serviceWorkers.enabled", true);
-#endif