Still works like a charm on FF22 & TB17 Rated 5 out of 5 stars

I use with both FF & TBird...move all other tools to the MenuBar (right click MenuBar>Customize), then hide the Navigation Toolbar (View>Toolbars>NavigationToolbar) menus, tools & navigation are all on ONE bar. So many useful items are missing from the new default condensed menu (esp. add-on menu items). This gives them all back AND still accomplishes the saved space.