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From Mozilla x86-64

This site is Mozilla products such as Firefox / Thunderbird for Windows x64 build. Official source code is for Windows IA32 only (You can build x64 version of Linux / MacOSX only) and may not be sometimes able to compile without patches because Win64 is Tier-3 platform as Mozilla.

Now Win64 build supports from Firefox 4. If you need patches to build Firefox 3.0, 3.5 or 3.6, see Source Code page.

Also, this is UNOFFICIAL BINARY, so you DON'T report a bug to If you want to report a bug, you try nightly build from or at first, then, file it, please. If you want to notice it to me, add my email address to bugzilla's CC.

At First

Getting binaries

Access Download page. All binaries support x64 Windows platform such as Windows XP Professional x64 Edition, Windows Vista 64-bit and Windows 7 64-bit. Of course, it works on Windows Server x64 version.

Getting Source Code

Access Source Code page

Building Firefox for Windows x64

Access MozillaBuild for x64 page

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