Some users prefer to have as much space in Firefox for websites as possible. One way to get rid of some of the toolbars and menus temporarily would be to press F11 which removes the title, the bookmarks toolbar and the menubar. Another way would be to just remove the menubar which is not needed most of the time anyway. To do that you simply need the Firefox extension called Hide Menubar which removes the menubar once installed.
You can temporarily display the menubar again by pressing the alt key on your keyboard. It is also possible to add it again by right-clicking the toolbars at the top and enabling the so called Mainmenu Toolbar. You can get rid of the bookmarks tab as well if you would like to but as far as I’m concerned they are pretty useful and I need them to often to hide them in Firefox.
Related posts:
- Firefox Bookmarks Toolbar is not showing bookmarks
- Tiny Menu Firefox Extension
- Hide The Firefox Tabbar
- Firefox Bookmarks Toolbar Tweak
- Firefox UI Tweaker
- Hide the Tab Bar in Firefox
- Hide Menus in Fullscreen with Autohide for Firefox
- Firefox Safe Mode

Thanks a lot for this idea!
Since the release of Google Chrome I’ve been looking for a way to re-consolidate user space in Firefox the same way as it’s done in G.Chrome.
Regards,
Dave
I installed Hide Menubar on my Ubuntu machine, but menu bar disappeared permanently, and ALT can not retrive it!
thankyou thankyou thankyou buddy ur gr8…:)