A really neat theme for Mozilla Firefox is Charmel. You can get it at shaw.ca/lucx. It's, in my opinion, a lot "friendlier" to the eyes than the average Windows XP theme. It also has an icon set that sorta reminds me (but not too much) of the old Netscape. :) Its menus and buttons are kind of like Apple's OS X or iTunes (read suweet), and the backgrounds for everything are the same hue (except lighter) as brown sugar\cinnamon and white sugar. Now, if there were only a Windows XP theme like this, so that the titlebar wouldn't be so contrasting. :)