You can unhide the menu bar pressing F10 or Alt, or go to Menu bar click on View >> Toolbars >> Menu bar

What is the other toolbar are you looking?

hi toddy thanks for trying to help you are dealing with an old not very bright lady. i am using windows 8 and when i press alt or f10 it does not restore the menu bar on firefox. thanks for tryingbold text

Try make the same in safe mode:

• Firefox in safe mode

Make sure that you do not run Firefox in full screen mode (press F11 or Fn + F11 to toggle; Mac: Command+Shift+F).

• https://support.mozilla.org/kb/how-to-use-full-screen

If you are in full screen mode then hover the mouse to the top of the screen to make the Navigation Toolbar and Tab bar appear.
Click the Maximize button (top right corner of the Navigation Toolbar) to leave full screen mode or right-click empty space on a toolbar and choose "Exit Full Screen Mode" or press the F11 key.

You can check for problems caused by a corrupted localstore.rdf file.

• http://kb.mozillazine.org/Corrupt_localstore.rdf

Who ever it was that gave me the suggestion to hit Alt key & then point arrow in the upper left corner under the menu tools & double click on it, & select or deselect restore. Well I did and it worked, thank you so very much now it stays on and no longer temporarily there. Thank you, thank you!