michael@0: var offlineByDefault = {
michael@0:   defaultValue: false,
michael@0:   prefBranch: SpecialPowers.Cc["@mozilla.org/preferences-service;1"].getService(SpecialPowers.Ci.nsIPrefBranch),
michael@0:   set: function(allow) {
michael@0:     try {
michael@0:       this.defaultValue = this.prefBranch.getBoolPref("offline-apps.allow_by_default");
michael@0:     } catch (e) {
michael@0:       this.defaultValue = false
michael@0:     }
michael@0:     this.prefBranch.setBoolPref("offline-apps.allow_by_default", allow);
michael@0:   },
michael@0:   reset: function() {
michael@0:     this.prefBranch.setBoolPref("offline-apps.allow_by_default", this.defaultValue);
michael@0:   }
michael@0: }
michael@0: 
michael@0: offlineByDefault.set(false);