Well, I couldn't resist it. A "WW2" web browser with lots of extras, under development, might not work, might crash your system, definitely an alpha, use at your own risk, and so on. Just had to try it. After a few hours of surfing and rustling through it's features, it really looks good. Flock is a clone of Firefox and is trying not to be a "branch" so that it will remain open source and compatable with Firefox users. But, oh my, the features.
Here's a list of thirteen things you really should try with Flock. We're bragging, of course, but at the end of the list you'll also find a few warnings about things we're still working on.
All in all, this is one alpha product I'd advise giving a try. Right now I'm using it on a Debian Sarge, Linux-only computer. It is fast and acts like it was designed for my system. Go get it here: http://www.flock.com/developer/