Download ((full)) Old Version Firefox Jun 2026

The safest way to acquire an older build is directly from Mozilla's official archives.

Before making changes, back up your bookmarks and passwords. Using an older version can sometimes corrupt your existing profile . download old version firefox

Navigate to the official directory, choose the version number, and then select your operating system (e.g., win64 , mac , or linux ) and language (e.g., en-US ). The safest way to acquire an older build

: Look for your locale folder, such as en-US . choose the version number

Run the downloaded installer. If you get a "Downgrade Protection" prompt, you may need to create a new profile to proceed. How to Prevent Firefox from Updating Automatically

All previous releases are hosted at the Mozilla Release Directory .