While it is the "latest" for your OS, it is no longer supported with security updates and faces significant compatibility issues on the modern web due to expired security certificates as of March 2025.
: You must use the 32-bit (win32) installer. Even if you are running Windows XP Professional 64-bit, the 64-bit version of Firefox requires Windows 7 or later. While it is the "latest" for your OS,
To run this version, your hardware must meet these minimums: : Windows XP SP2 or SP3 . released on June 26
The latest version of Mozilla Firefox that supports Windows XP Professional (including 64-bit editions) is , released on June 26, 2018. While it is the "latest" for your OS,
: Firefox 52.9.0 ESR (Extended Support Release).