Back out 32c6f4faef5a (bug 1252929) on suspicion of causing test_MediaSource.html crashes @mozilla::layers::GLImage::GetAsSourceSurface on Android

CLOSED TREE

mobile/android/app/mobile.js

@@ -611,12 +611,7 @@ pref("layers.low-precision-opacity", "1.0");
 // 2) Pages that have too many layers consume too much memory and crash.
 // By limiting the number of layers on mobile we're making the main thread
 // work harder keep scrolling smooth and memory low.
-#ifdef NIGHTLY_BUILD
-// Temporary experiment
-pref("layers.max-active", 3);
-#else
 pref("layers.max-active", 20);
-#endif
 
 pref("notification.feature.enabled", true);
 pref("dom.webnotifications.enabled", true);