There exists a browser faster than Mozilla Firefox: K-meleon.
For some time now, K-meleon has combined the sleek looks and fast app-load times of Internet Explorer and the lightning fast page-loads of Firefox, but it has done so in relative obscurity. The fact that it is also, arguably, the most customisable browser on the planet, with almost everything (from the bookmarks plugin to mouse gestures navigation) implemented through plugins makes me wonder why it is not more widely known. There was the problem with it having too many options (ha!) and being too difficult to configure, but the new Wechselbalg release solves much of the issues with its very nice defaults; even a relative newbie can make the browser act good.
The speed differences have to be seen to be believed. I have a feeling that the browser has been written from the ground up with load times and performance in mind because it’s so much zippier than any Firefox build I’ve used – even the page-load times feel faster. Since it uses the Gecko engine (Mozilla 1.8+!) there are no major rendering issues, and every browser looks and acts the same as in Firefox. Moroever, it can even use the same bookmarks file that Firefox uses so you can switch between browsers on the fly. It is amazing, windows users, do try it out!