Bug 826771 pref-applicationManager.xul is broken because Services isn't defined in the scope r=IanN.

suite/common/pref/pref-applicationManager.js

@@ -5,6 +5,8 @@
 // As pref-applications.js is always loaded, we can (and should!) reuse
 // the nsI* constants from there, if needed also any services we need.
 
+Components.utils.import("resource://gre/modules/Services.jsm");
+
 var gAppManagerDialog = {
   _removed: [],