Tip: Remove toolbar clutter with userChrome.css hacks you can do
About five years ago, Lifehacker published an article about how to remove a lot of clutter from the toolbars of Firefox 2.something (one commenter asked about doing it in Firefox 3 beta 4). Much of it is outdated, but some of the hacks still work and are very much worth doing, especially if you use Portable Firefox on small(er) screens. (This works for regular, locally-installed Firefox as well, it just requires the extra step of locating your profile.)