Does ZK require browsers support XUL?
ZK doesn’t count on whether a browser supports XUL. For sake of cross-browser compatibility, ZK generates HTML tags according what XUL or XHTML components are used. For browser’s viewpoint, it is only standard HTML, CSS and JavaScript codes. On the other hand, ZK doesn’t limit you from using the native support of XUL by the browser, as long as a corresponding component set is provided.