Bug 1561298 - Allow User-initiated Picture-in-Picture to ride out to early beta / dev edition. r=Gijs

This also moves the enabling of the feature out from all.js into firefox.js, where it should
probably have been all along.

Differential Revision: https://phabricator.services.mozilla.com/D35809

--HG--
extra : moz-landing-system : lando

browser/app/profile/firefox.js

@@ -1496,6 +1496,13 @@ pref("media.autoplay.block-webaudio", true);
 pref("media.autoplay.block-webaudio", false);
 #endif
 
+#if defined(XP_WIN)
+#if defined(EARLY_BETA_OR_EARLIER) || defined(MOZ_DEV_EDITION)
+pref("media.videocontrols.picture-in-picture.enabled", true);
+pref("media.videocontrols.picture-in-picture.video-toggle.enabled", true);
+#endif
+#endif
+
 // Play with different values of the decay time and get telemetry,
 // 0 means to randomize (and persist) the experiment value in users' profiles,
 // -1 means no experiment is run and we use the preferred value for frecency (6h)

modules/libpref/init/all.js

@@ -342,13 +342,8 @@ pref("media.decoder-doctor.verbose", false);
 // URL to report decode issues
 pref("media.decoder-doctor.new-issue-endpoint", "https://webcompat.com/issues/new");
 
-#if defined(NIGHTLY_BUILD) && defined(XP_WIN)
-pref("media.videocontrols.picture-in-picture.enabled", true);
-pref("media.videocontrols.picture-in-picture.video-toggle.enabled", true);
-#else
 pref("media.videocontrols.picture-in-picture.enabled", false);
 pref("media.videocontrols.picture-in-picture.video-toggle.enabled", false);
-#endif
 pref("media.videocontrols.picture-in-picture.video-toggle.flyout-enabled", false);
 pref("media.videocontrols.picture-in-picture.video-toggle.flyout-wait-ms", 5000);
 pref("media.videocontrols.picture-in-picture.video-toggle.always-show", false);