Despite being years past its "End of Life," people still hunt for the official Mozilla FTP installer for three specific reasons: Firefox ESR 52.9.0 System Requirements
: Web developers often use it to test site compatibility on older rendering engines. PortableApps.com Vital Warnings Security Risks : This version reached End of Life (EOL)
In the fast-paced world of internet browsers, where new versions roll out every few weeks, it is rare for a specific version number to become a landmark. is one such exception. Released in the summer of 2018, this particular build represents the end of an era.
Mozilla no longer hosts old ESR versions on its main site. However, the is available here: