--- a/mobile/android/app/mobile.js
+++ b/mobile/android/app/mobile.js
@@ -911,16 +911,17 @@ pref("identity.sync.tokenserver.uri", "h
 // Enable Presentation API on Nightly
 pref("dom.presentation.enabled", true);
 pref("dom.presentation.controller.enabled", true); // enable 1-UA mode
 pref("dom.presentation.receiver.enabled", true); // enable 1-UA mode
 #endif
 
 pref("dom.audiochannel.audioCompeting", true);
 pref("dom.audiochannel.mediaControl", true);
+pref("media.block-autoplay-until-in-foreground", false);
 
 // Space separated list of URLS that are allowed to send objects (instead of
 // only strings) through webchannels. This list is duplicated in browser/app/profile/firefox.js
 pref("webchannel.allowObject.urlWhitelist", "https://accounts.firefox.com https://content.cdn.mozilla.net https://input.mozilla.org https://support.mozilla.org https://install.mozilla.org");
 
 pref("media.openUnsupportedTypeWithExternalApp", true);
 
 pref("dom.keyboardevent.dispatch_during_composition", true);