If you like Firefox on Windows system but have been waiting for the 64-bit version, check this one browser out, Waterfox, the fastest 64-bit variant of Firefox. As stated on its website, waterfoxproject.org, the browser is based on Mozilla Firefox source code, but compiled in Intel’s C++ Compiler for 64-bit systems.
Waterfox can be installed side-by-side with Firefox, however only one browser can run at a time as Waterfox accesses Firefox bookmark and pretty much your whole Firefox profile data. For me that is a good thing as I have nothing to copy over or modify and I can start using it as my default browser, but you may want to be careful if this is not really what you want.
All Firefox add-ons will also work, as long as they are 64-bit.
There are many advantages of using a 64-bit, among them are speed, multi-tasking and improved stress handling.
Unlike Firefox, there’s no auto-update feature yet, so you have to keep checking Waterfox project’s website for the latest version. The other one is that the latest version of Waterfox is not necessarily in synced with Firefox. UPDATE: Waterfox does auto-update now and the version gap between Firefox and Waterfox, while it still exists it’s very close and with auto-update it’s almost negligible. Many Firefox’s 32-bit plugins may not run correctly on Waterfox. Other than that, this browser seems to deliver what it’s promised. It is FAST!