--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -636,16 +636,21 @@ pref("media.decoder.recycle.enabled", fa
 
 //Weather MFR should try to skip to next key frame or not.
 pref("media.decoder.skip-to-next-key-frame.enabled", true);
 
 // Log level for cubeb, the audio input/output system. Valid values are
 // "verbose", "normal" and "" (log disabled).
 pref("media.cubeb.logging_level", "");
 
+#ifdef NIGHTLY_BUILD
+// Cubeb sandbox (remoting) control
+pref("media.cubeb.sandbox", true);
+#endif
+
 // Set to true to force demux/decode warnings to be treated as errors.
 pref("media.playback.warnings-as-errors", false);
 
 // Weather we allow AMD switchable graphics
 pref("layers.amd-switchable-gfx.enabled", true);
 
 // Whether to use async panning and zooming
 pref("layers.async-pan-zoom.enabled", true);