Please try these steps to see if this problem is caused by an add-on: Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

If that doesn't help, please let us know.

The problem is I don't have the Firefox button at the top of my screen.

I disabled all Extentions! (doesnt solve the problem)

Gui problem with Menus, Firefox menu and also when i right click a link, the menu doesnt Pop up

I feel like going back to FF3.6

• • UPDATE**

I disabled all extentions, now i disabled hardware acceleration and restarted FireFox 4 two times...

after doing so, i have no problems...

i will reactivate each extention one by one, restarting at each to find out who is responsible for this..probably just Hardware acceleration...*check it out everyone!*

Problem solved: Solution is : Disable Hardware acceleration

note: all my extensions work! the problem was Hardware acceleration

Question: does it mean my FF4 is not fast? because it doesn't have hardware acceleration?

thanks mbrubeck !

Hardware acceleration is a new feature in Firefox 4, which makes scrolling and animations faster on many web sites. Firefox 4 will not be as fast without acceleration, but it will still be faster than Firefox 3.6.

You might be able to re-enable hardware acceleration after installing all updates for your operating system, and driver updates from your computer manufacturer.

omg this is the worst version Firefox made yet i get nothing but lag, games take 5 times longer to load. idk why developers have to go fix something that's not broken. im going back to version 3+ if Firefox ever gets rid of this version ill find another browser to use. because ff4 is way worse then ie browser. the plugin-container that was added sucks as well. u say suppose to stop crashes. that may be. it sure dont help out the lag it causes. im not happy with Firefox update at all.

THUMBS DOWN