Immediately after I downloaded the new version of Firefox (4.0.1 w/ Mac OS 10.6.7) my Firefox menu bar no longer worked. It is visible, the buttons simply won't toggle. When I click on a different application it's menu bar will work. However, it's a pain to have to go into another application to be able to click my Apple menu.

Is there a settings or preferences button I inadvertently clicked that shut this tool off? Is it standard to this highly updated version of Firefox? Any help is greatly appreciated.