https://en.wikipedia.org/wiki/Firefox

hii denis70720

Restore the Menu bar in Firefox if you want to have the menu bar displayed normally.

to Restore the Menu bar in Firefox Show the menu bar again

   Click the menu button Fx57Menu and choose Customize.
   Click Toolbars at the bottom of the screen and click Menu Bar.

   menu bar customize 57

   Click Done to save your changes. 

Don't need to see the menu bar all the time? To temporarily show the old style menus, just press the Alt key. Turn off full screen mode

Here's how to turn off full screen mode so you can see the menu bar again.

   Click the menu button fx57menu on the right side of the toolbar.
   Click the full screen button fullscreen menu button 57 .

   fullscreen menu 57

Fix corrupted toolbars and controls

If the file storing your toolbar information has become corrupt, you can use the Refresh Firefox feature to restore the default toolbar settings and controls. See Refresh Firefox - reset add-ons and settings.

@ Pallavi kumari and ANAMIKA KUMARI :

Please, read he OPs post ......

please reply in simple englisch or/and pictures or german

Hallo denis7072000,

Für den Fall, dass Sie in einem deutschen Support-Forum komfortabler sind :

https://www.camp-firefox.de/forum/index.php