Published: September 6, 2025
Firefox extends support for Windows 7, 8, and 8.1 until 2026, Mozilla has confirmed. Users running older versions of Windows will continue receiving security updates through Firefox 115 Extended Support Release (ESR) until March 2026. A policy review is also scheduled for February 2026, giving millions of legacy system users more time to browse safely.
Understanding Firefox 115 ESR Support for Windows 7, 8, and 8.1
Firefox 115 ESR, released in July 2023, was originally planned to be the final version supporting Windows 7, 8, and 8.1, with support ending in September 2024. However, due to the large number of users still relying on these systems, Mozilla extended the support period multiple times.
The Extended Support Release (ESR) is designed for stability and security rather than new features. This makes it ideal for individuals and organizations that depend on reliability when running older operating systems.
Why Firefox Extends Support for Windows 7, 8, and 8.1 Until 2026
Although Microsoft officially ended support for Windows 7, 8, and 8.1 in January 2023 , many users continue using these systems. Mozilla’s internal data shows that Windows 7 alone still accounts for about 6.7% of Firefox users.
Other browsers like Google Chrome and Microsoft Edge have already stopped supporting these older platforms. By contrast, Firefox continues to provide essential security updates, ensuring users can browse more safely despite outdated operating systems.
This extension is particularly valuable for users who cannot upgrade immediately due to hardware limitations, work restrictions, or personal preference.
What This Firefox Support Extension Means for Users
Security Updates Only
For users on Windows 7, 8, and 8.1, Firefox 115 ESR will continue to receive security patches only. While no new features will be introduced, these updates are vital for protection against malware, vulnerabilities, and online threats.
Upgrading Remains Important
Even though Firefox extends support for Windows 7, 8, and 8.1 until 2026, using older Windows versions still poses risks. Mozilla strongly recommends upgrading to Windows 10 or newer for long-term safety.
For hardware that cannot run the latest Windows versions, switching to lightweight and secure Linux distributions such as Ubuntu or Linux Mint is a safer, modern alternative.
Planning for the Future
Support for Firefox 115 ESR is guaranteed until March 2026. Beyond that date, Mozilla may or may not extend support further. While past extensions suggest it’s possible, users should not depend on it. Planning a system upgrade now is the safest option.
Tips for Safe Browsing on Older Windows Systems
- Keep Firefox Updated – Always install the latest ESR version.
- Avoid Risky Sites – Stick to trusted websites and avoid suspicious downloads.
- Use Basic Security Tools – Antivirus software and regular scans are essential.
- Prepare for an Upgrade – Start planning your transition to Windows 10 or Linux.
Why Firefox Is the Best Choice for Legacy Windows Users
Unlike Chrome or Edge, Firefox extends support for Windows 7, 8, and 8.1 until 2026, making it the only mainstream browser still offering security updates for older platforms.
This commitment highlights Mozilla’s dedication to stability, security, and accessibility. For millions of users still running older systems, Firefox remains the most reliable and secure browser option.
Conclusion
Firefox extending support for Windows 7, 8, and 8.1 until March 2026 ensures that users on legacy systems stay protected with ongoing security updates. While only patches will be delivered (no new features), this extension provides crucial extra time for those unable to upgrade immediately.
Mozilla still encourages users to plan an upgrade to Windows 10, Windows 11, or Linux alternatives for long-term protection. For now, Firefox continues to stand out as the only browser prioritizing security for older Windows users.
