--- a/modules/libpref/src/init/all.js
+++ b/modules/libpref/src/init/all.js
@@ -3843,18 +3843,18 @@ pref("layers.offmainthreadcomposition.en
 pref("layers.offmainthreadcomposition.frame-rate", -1);
 
 // Asynchonous video compositing using the ImageBridge IPDL protocol.
 // requires off-main-thread compositing.
 pref("layers.async-video.enabled", true);
 pref("layers.async-video-oop.enabled",true);
 
 #ifdef XP_WIN
-pref("layers.offmainthreadcomposition.enabled", false);
-pref("layers.async-video.enabled", false);
+pref("layers.offmainthreadcomposition.enabled", true);
+pref("layers.async-video.enabled", true);
 pref("layers.async-video-oop.enabled", false);
 #endif
 
 #ifdef MOZ_WIDGET_QT
 pref("layers.offmainthreadcomposition.enabled", true);
 #endif
 
 #ifdef XP_MACOSX