Mac
15
Ok I like the Origonal Mozilla.
1 Tab browsing
2 Integrated Email and newsgroups, IRC chat client.HTML editor (Composer) and more
3 Very Stable
4 No Ads
5 Multi Platform (I use Windows, Mac OS X, and Linux and It works on all 3)
6 Ad-Blocker
7 Junk mail Filter (which is good as spamkiller does not work with it)