[portable] Download Firefox: Older Versions

Whether you are a developer testing legacy web applications, a retro computing enthusiast trying to breathe life into an old operating system, or simply someone who prefers the interface of a bygone era, there are valid reasons to seek out older versions of Mozilla Firefox.

Mozilla maintains an official archive of all past Firefox releases. You can access it here: download firefox older versions

Older versions will try to update themselves immediately upon launch, which defeats the purpose of using an older version. Whether you are a developer testing legacy web