Why are they removing basic stuff?
Australis Small Icons (Small icons view for firefox - works with any theme like the old option)
Smaller View 1.0:
Makes stuff smaller to save space. Smaller View compress navigation and tab toolbars. Restartless. Australis.
The Addon Bar (restored) 3.1
or
New Add-on Bar0.22
Toolbar Autohide
Enables automatic hiding of toolbars (tabs, navigation, bookmarks and add-on bar) via context menu options.
Classic Theme Restorer (Customize Australis) 1.1.8
Restore squared tabs, appmenu, add-ons bar, small button view and more on Australis UI (Windows/MacOSX/Linux + Fx 29+).
Facebook Timeline Toggle
Hide your timeline and get rid of distractions!