From C/Net News

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.

For one thing, there's no installer included yet, though that work is under way, too. For another, the software is still one of the very raw "nightly" builds for developers.

Support for 64-bit processors is one of the planned Firefox 4 features. Mozilla hopes to release Firefox 4 by the end of November.

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