Download _top_ Firefox 12-51 52 Esr -

Trying to run old web-based hardware or testing site compatibility on older builds? You can still find official downloads for Firefox 12-51 and the final

It served as the final supported Firefox version for Windows XP and Windows Vista users. Download Firefox 12-51 52 Esr

Downloading and using older versions of Firefox like or versions 12 through 51 Trying to run old web-based hardware or testing

If you need a modern stable version for a newer OS, download the latest Firefox ESR or the standard browser from Mozilla's homepage . open the Firefox menu (☰)

Turn off your Wi-Fi before running the installer.

After installation, open the Firefox menu (☰), go to Settings > General > Firefox Updates , and select "Check for updates but let you choose to install them" .