Dropping the tech stuff, the tabs are excellent. Allows you to have x number of sites open in just one window, it means your tqaskbar isn't screwed up with fifty windows, all you need to do is hit cntrl T and bang you've got a new tab, then you use the bookmark toolbar (i think IE has something similar) where you get yuor fave sites on a handy toolbar resting above your tabs, you click one of them and your at your site. Tabs allow for faster and more organised browsing I find.
Also not that I do but there's quite alot of cool looking skins you can d/l.
Edit: A nice link for you:
http://browsehappy.com/
Edit: I didn't put mozzilla in quite simply because it's not that popular. If you want a suite, I thought most people used the 'interlocking' qualities of firefox/thunderbird or simply Opera which is a suite. Mozilla isn't as popular as the others imo.