12-51 52 Esr [2021]: Download Firefox

https://archive.mozilla.org/pub/firefox/releases/

: Versions like Firefox 12 are among the last to support Windows XP and Server 2003. ⚠️ Important Warnings Download Firefox 12-51 52 Esr

To download specific older versions of Firefox, including the Extended Support Release (ESR) versions like 52, you should use the official Mozilla FTP Archive Official Download Links https://archive