Rated 4 out of 5 stars
Addon works as advertised but could still be improved.
- Option to choose whether it hides all but the tabs (current configuration), or hide all but the tabs and the bookmarks toolbar or alternatively/also any other toolbar.
- Fix the Firefox window borders to stop revealing the toolbars. Only trigger depending on if the above selected option is touched. (Tab bar, Bookmark toolbar or Navigation toolbar.)
- Option for user-defined time to be displayed before hiding.