ram: <a href="http://ubuntuforums.org/showthread.php?t=1120475" rel="nofollow">http://ubuntuforums.org/showthread.php?t=1120475</a>  (I think I've seen windows guides somewhere)<p>defragmenting: <a href="http://lifehacker.com/5344418/make-firefox-faster-by-vacuuming-your-database" rel="nofollow">http://lifehacker.com/5344418/make-firefox-faster-by-vacuumi...</a>