• In Firefox 3.6 and later on Windows you can hide the "Menu Bar" via "View > Toolbars" or via the right-click context menu on a toolbar.
• Press F10 or press and hold the Alt key down to bring up the "Menu Bar" temporarily.
• Go to "View > Toolbars" or right-click the "Menu Bar" or press Alt+V T to select which toolbars to show or hide (click on an entry to toggle the state).

See also:

• Restore the Menu bar in Firefox
• http://kb.mozillazine.org/Toolbar_customization

My computer does not have F10; F8 is the highest. I cannot access View. A right or left click will ask me to restore, minimize or close. Firefox does not provide View on my toolbar.

Fixed it! I followed the link to "menu bar is missing" and was able to put it back.