: Pentium 4 or newer with SSE2 support . If your CPU does not support SSE2, the last working version is Firefox 48.0.2. RAM : At least 512 MB (1 GB recommended). Current Limitations
: Firefox 52.9.0 ESR (Extended Support Release). : Pentium 4 or newer with SSE2 support
To run this version, your hardware must meet these minimums: : Windows XP SP2 or SP3 . released on June 26
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. : Pentium 4 or newer with SSE2 support
The latest version of Mozilla Firefox that supports Windows XP Professional (including 64-bit editions) is , released on June 26, 2018.