<a href="http://www.macworld.com/appguide/article.html?article=138409" rel="nofollow">http://www.macworld.com/appguide/article.html?article=138409</a><p>Apple doesn't have a problem with third-party web browsers
 as long as they use the WebKit engine. Otherwise, the app would be implementing its own language interpreter and therefore be against the developer agreement.