Firefox Windows Xp Professional ⟶

End-of-Life. No security patches or feature updates have been issued since 2018.

Firefox 52.9.0 ESR (released June 2018). Firefox Windows Xp Professional

For users of , Firefox is historically significant as the last major browser to maintain any form of support. However, as of April 2026 , Firefox on XP is considered legacy software with severe limitations. ⚡ Quick Reference: Firefox on XP End-of-Life

If you must use Firefox on XP Professional, follow these steps to install the final compatible version: as of April 2026

As of March 14, 2025, an expired root certificate has caused widespread functionality loss, making many modern websites inaccessible without manual certificate updates. 🛠️ Installation Guide for Windows XP