--- a/b2g/graphene/graphene.js
+++ b/b2g/graphene/graphene.js
@@ -48,8 +48,15 @@ pref("b2g.nativeWindowGeometry.screenX",
 pref("b2g.nativeWindowGeometry.screenY", -1); // center
 pref("b2g.nativeWindowGeometry.fullscreen", false);
 
 pref("media.useAudioChannelService", false);
 
 #ifdef ENABLE_MARIONETTE
 pref("b2g.is_mulet", true);
 #endif
+
+// Most DevTools prefs are set from the shared file
+// devtools/client/preferences/devtools.js, but this one is currently set
+// per-app or per-channel.
+// Number of usages of the web console or scratchpad. If this is less than 5,
+// then pasting code into the web console or scratchpad is disabled
+pref("devtools.selfxss.count", 5);