XUL (XML User Interface Language) is Mozilla's XML-based language that lets you build feature-rich cross platform applications. It provides user interface widgets like buttons, menus, toolbars, trees, etc that can be used to enhance add-ons by modifying parts of the browser UI.
XUL (XML User Interface Language) d tutlayt yebnan ɣef XML n Mozilla ara k-yeǧǧen ad tesneflif̣ isnasen ɣef deqs n inagrawen. Yettmuddu-d iferdisen n ugrudem n useqdac am tqeffalin, umuɣen, ifeggagen n ifecka, isekla, atg izemren ad ttwasqedcen deg usnerni n izegrar s usnifel n yeḥricen n ugrudem n useqdac UI n iminig.