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 and http://kb.mozillazine.org/Toolbar_customization

Thank you. The only solution that worked was to do Alt V this brought up the menu bar so I could use

View

Toolbars

choosing the individual ones that I wanted to view. I did neglect in my original post to indicate that I am using Windows 7.

I would like to suggest that the right click option for toolbars be placed in an easy to find location. Like the middle third of the title bar, how would I go about making this suggestion.

I use FireFox almost exclusively. Thank you, Cor-el for the quick response. Have you talked to Superman lately?

The Titlebar has a Contextual menu for the Operating System menu items on most systems; current and previous Firefox versions don't override that type of menu. Since Alt and the underlined letter (a hotkey), like to open the Bookmarks menu, opens the various menu items when the Menu bar is showing, it's logical that the Alt key alone would be the trigger to reveal a hidden Menu bar - as long as you are familiar with the keyboard commands in Firefox.

That is being changed in Firefox 4.0, so that when you hide the Menu bar a "Firefox" button appears and is semi-merged with the Navigation bar or the Tabs-strip depending upon another new user setting; Firefox use of the Titlebar area is part of that change, and that varies depending upon the OS Firefox is installed on. Since the new UI isn't complete yet there might be other changes, too.