When you want to use webkit to display HTML in AIR 2.5 mobile projects you want to use StageWebView. Since StageWebView is a subclass of EventDispatcher you cannot add it to the display chain right away. The API works a bit differently and you need to define a Rectangle as the viewPort. However, I thought it would be convenient to have a StageWebView UIComponent so that you can add it to the display chain. It is just a wrapper class which exposes the needed APIs like the text and url setter and the methods show, hide and dispose. Further you can listen for all event listeners which just get cloned and re-dispatched.