Bug 1352014 - add the flag 'RELEASE_OR_BETA' for the pref 'media.block-autoplay-until-in-foreground'.
Put this feature only on Aurora and Nightly until it's stable enough.
MozReview-Commit-ID: 4jl9gZO3wtt
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -5595,17 +5595,21 @@ pref("dom.maxHardwareConcurrency", 16);
pref("osfile.reset_worker_delay", 30000);
#endif
#if !defined(MOZ_WIDGET_GONK) && !defined(MOZ_WIDGET_ANDROID)
pref("dom.webkitBlink.dirPicker.enabled", true);
pref("dom.webkitBlink.filesystem.enabled", true);
#endif
+#ifdef RELEASE_OR_BETA
+pref("media.block-autoplay-until-in-foreground", false);
+#else
pref("media.block-autoplay-until-in-foreground", true);
+#endif
#ifdef MOZ_STYLO
// Is the Servo-backed style system enabled?
pref("layout.css.servo.enabled", true);
#endif
// HSTS Priming
// If a request is mixed-content, send an HSTS priming request to attempt to