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Is there a 64 bit version of Firefox? There is this web site on the web; however I do not think that this is an official Mozilla site: http://www.firefox64bit.c

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  • Last reply by James

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Is there a 64 bit version of Firefox. There is this web site on the web; however I do not think that this is an official Mozilla site:

There is also a Waterfox browser that is available in 64 bit; however I again am hesitant to download from an unknown site.

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Mozilla doesn't have a release version of Firefox 64-bit for Windows operating systems. Mozilla does have Nightly alpha-level 64-bit versions for Windows, but currently they are generated to only verify that Nightly channel changes aren't being broken on 64-bit versions of Windows.

There are a few 3rd party 64-builds available, like Waterfox, but those aren't official Mozilla releases.

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There is nothing on the site to indicate it is by and Mozilla would never create such a site like this for Firefox builds, especially without any links around.

Also whomever created and is maintaining the site is apparently not aware that there has been official 64-bit Release builds of Firefox for Linux and for Mac OSX (universal binary) ever since Firefox 4.0. If I recall the owner was listing third-party builds before that were outdated.

Ok it looks like this unofficial Firefox 64-bit site is linking to another unofficial download site for these builds.

They look to be random Nightly builds from February 7 or 8 date time. I say random because the Nightly channel gets checkins pretty much everyday so therefore they get a update each of those days.

Mozilla has Linux 64-bit builds of Firefox 27.0.1 listed at

Modified by James