From Mozilla x86-64

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Mozilla starts to build x64 binary from 3.7a5. If you want to get official packages, go to or It supports auto-update.

Firefox Windows x64 build doesn't work on 32bit Windows even if you use processor that supports Intel EM64T or AMD64. If you want to use this, you have to install Windows x64 version (Windows XP Professional x64 Edition, Windows Server 2003 x64 Edition or Windows Vista x64).

About plugin, see Firefox:Plugins. 32-bit plugin doesn't support on 64-bit build.

This is UNOFFICIAL BINARY, so you DON'T report a bug to (trunk version. Some packages may require VC++9 DLL.)

Firefox 3.6

Firefox 3.5

Firefox 3.0