Free Download Firefox 4.0 (x64) 64-bit for Windows 7 and Windows Vista. 64-bit (x64) of Firefox 4.0 for Windows 7 and Windows Vista is now available for free download at Mozilla’s FTP servers. Firefox 4.0 (x64) is only a pre-Alpha release, and not the fully fledged and developed. The download file has been named Firefox-3.7a5pre.en-US.win64-x86_64 [...]