There is no obvious way in Firefox to reduce the size of the menu toolbar. I always thought that it was a big waste of space to have this bar enabled all the time. I’m personally using the Tiny Menu Firefox extension which displays just a Menu item next to the usual buttons such as forward, back and reload. I added a screenshot of how my setup looks like at the end of the article.
I did find another interesting Firefox extension called Personal Menu which reduces the menu bar to three buttons that can be placed in the other toolbars. Two buttons are for the bookmarks and the history function while the third is fully customizable. You can add any kind of menu from the menu bar for instance to this personal menu.
You should add at least the Addons menu before you disable the Menu Toolbar. In case something goes wrong you need to be able to disable the extension again. Take a look at the screenshots to see the differences:
- The normal menu bar

- Firefox Menu with Tiny Menu Extension

- Firefox Menu with Personal Menu Extension

- Firefox UI Tweaker
- Firefox Bookmarks Toolbar is not showing bookmarks
- Tiny Menu Firefox Extension
- Remove Traces Of Active Websites in Firefox
- Firefox Hide Menubar
- Firefox Bookmarks Toolbar Tweak
- How I did reduce Firefox Memory Consumption by 15 Megabytes
- Sort Firefox Bookmarks

Although the ‘Personal Menu’ extension is the subject of this post, thanks for aterting me to the TINY MENU extension… :)
Ever since IE7 got rid of the menu bar I’ve been wanting the same in Firefox. I’m with you that there’s really no need for the menu bar to take up an entire row of screen space.
Ta very much! :)
Very simple way to hide your menubar.
Addon Hide Menubar
https://addons.mozilla.org/en-US/firefox/addon/4762