Now, there are two really easy ways to restore the Menu Bar in Firefox 4:

The first one is the easiest, just simply press the Alt key in your keyboard and you will temporarily bring back the old good Menu Bar (see last portion of the above image), and pressing Alt key one more time it will hide it again. And the second method is to permanently bring back Firefox 4 Menu Bar and it is just as easy as clicking in the new orange Firefox button,  select Options, and then click on the Menu Bar option, that’s it!

There is also the possibility to that file storing the toolbar information can become unusable or corrupt and you won’t be able to view the Menu Bar, in this case you can close and re-start Firefox in safe mode and select the Reset toolbars and controls options and Make Changes and Restart.

Note to start Firefox in safe mode just click Start , All Programs, navigate to the Mozilla Firefox folder, and then select Mozilla Firefox (Safe Mode), or the other way is to start the Windows run command and type firefox -safe-mode and hit Enter. Mar. 9, 2011 Update The third way is to right-click  Firefox toolbar and simply select Menu Bar. All content on this site is provided with no warranties, express or implied. Use any information at your own risk. Always backup of your device and files before making any changes. Privacy policy info.