Hit the Alt key to show the Menu bar, then open View then Toolbars and select Menu bar, so it has a check-mark.

thank you

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menu bar is there just no URL

Make sure that toolbars like the "Navigation Toolbar" and the "Bookmarks Toolbar" are visible: "View > Toolbars"

• If items are missing then open the Customize window via "View > Toolbars > Customize" or via "Firefox > Options > Toolbar Layout"
• If a missing item is in the toolbar palette then drag it back from the Customize window on the toolbar
• If you do not see an item on a toolbar and in the toolbar palette then click the "Restore Default Set" button to restore the default toolbar set up.

• https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

Thank you cor-el. The Navigation Toolbar was not visible and that did it!

Oops it was the bookmark toolbar that did it.