Google has released a new beta of their Chrome browser, and, among other things, it's pretty darn quick. I've been using Chrome on my work PC for about a year now, and at home on both my Linux desktop and MacBook since they've been available, and I do like it. I'm sure a lot of this speed test I'm about to show you has to do with the connection speed of the computer (and possibly sites that have been viewed before), but it's still renders the page super fast.
With the help of @ClubUbuntu and this post on his website, I have now installed Google Chrome with Flash support into my Ubuntu 9.04 desktop. So far, I'm pretty impressed.
I use Firefox, almost exclusively, for all of my internet needs. I like the rendering, the plug-ins, and the way it looks. I think, for work at least, the reason I like Firefox the most is the ability to set a proxy server independent from the Windows proxy settings.