Firefox Windows Xp Professional -

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

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 Firefox Windows Xp Professional

End-of-Life. No security patches or feature updates have been issued since 2018. If you must use Firefox on XP Professional,

Firefox 52.9.0 ESR (released June 2018). 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