Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
For many Windows users, tabbed browsing is a key attraction for the Mozilla family of browsers. The ability to add multiple 'tabbed' views within one browser window is a feature that some users like to push to extremes.
Microsoft's current stable production version of Internet Explorer does not include tabs, though its next generation version 7 (currently at Beta 3) does.
So how many tabs can you fit in one window? No matter how many you can fit into Firefox 1.5.x, the next release of Firefox 2.0 Beta 2 will give you more.