I'm having a few problems with Firefox 4 1 - Random links are acting has the back button on my browser, rather than taking to the url in the link am going back a page. 2 - Certain games suffering from slow down during play. Only started happening after update to Firefox 4. Worse one is Zuma Blitz on Facebook. Game slows down to almost be frozen every time I fire a ball. This doesn't happen on internet explorer, and continues to happen on Firefox even when I disable all my add-ons and unnecessary plug-ins. 3 - When closing the browser, the last video streaming site I visited (e.g youtube) briefly becomes visible again even if it wasn't the last page I was visited.