Firefox disable titlebar
From WikiMLT
Firefox looks much better in most desktop environments with disabled Title bar. The steps that must be performed are:
1 – click on the Application menu in the upper right corner,
2 – click on More tools,
3 – click on Customize toolbar,
4 – uncheck the option Title bar.
Screen 2. Firefox Show/Hide Tool bar – 2 of 3. 
Screen 3. Firefox Show/Hide Tool bar – 3 of 3. 
