Firefox for Windows Starts 64bit Transition
"Mainstream microprocessors have been 64-bit for years. Operating systems have followed suit. Now it's time for a program used by hundreds of millions of people to make the leap: Firefox. Programmer Armen Zambrano Gasparnian announced the first 64-bit Firefox builds for Windows on Friday, offering an FTP site for those who want to download it. But the software isn't for mainstream users yet."