null 0 false this._observers[aTopic].push({ callback: aObserver, params: aParams }); false try { Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm"); new WindowDraggingElement(this, window); } catch (e) {} try { Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm"); new WindowDraggingElement(this, window); } catch (e) {}