Rated 4 out of 5 stars
It's a really useful addon but like another Hide Caption extension it doesn't play nice with KrickelKrackel autohide for full screen. If you try starting FF in full screen the Menubar is visible. You have to normalize it first then go full. An obvious solution is to start FF in normal mode however you run into the same problem when opening a new window while in full screen.
Also why not give the option to have the title on the status bar?