Just a quick note to mention that Firefox version 3.6 brings Firefox's 'Full Screen' feature for the Mac for the first time -- try it out by selecting View » Full Screen. Once enabled, it actually goes into true full screen mode just like its Windows counterpart: the menu bar disappears, the toolbar and URL entry area vanish, as does the Dock. Cool!
[robg adds: To exit full screen mode, just press Shift-Command-F again.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20100208083224902