Now when it comes to using a browser, some people like a lot of open space and others like to have a plethora of tool bars. 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. And there is also anther way to remove Menu bar and Other toolbars by Using Hide Menubar.
This extension allows for you to easily hide the menu bar inside of Firefox. This gives you more room to browse the Web. You can always bring it back though, just by hitting the ALT key to show it temporarily.
