Version 52 ESR was the last family to officially support Windows XP (SP2) and Windows Vista .
Fetch the Firefox Setup 52.7.3esr.exe (for Windows) from the official Mozilla archive. firefox setup 52.7.3 esr download
The was a significant milestone in Mozilla's history, released on March 26, 2018. While it is no longer the current version, it remains a critical download for users operating on legacy hardware or those requiring specific "old-school" browser features that modern versions have since phased out. Why Download Firefox Setup 52.7.3 ESR? Version 52 ESR was the last family to
It is often safer to disconnect from the internet during installation to prevent the browser from immediately trying to auto-update to a modern version. While it is no longer the current version,
Windows XP SP2+, Windows Vista, or macOS 10.9 through 10.12. Installation Guide
For those who don't want to install it system-wide, a portable edition is available via PortableApps on SourceForge . System Requirements