Mozilla has continued to support Firefox on Windows 7, Windows 8, and Windows 8.1 long after these operating systems reached end of life, helping users extend the life of their devices and reduce unnecessary obsolescence. We originally announced that security updates for Firefox ESR 115 would end in September 2024, later extending that into 2025.

Today, we are extending support once again: Firefox ESR 115 will continue to receive security updates on Windows 7, 8, and 8.1 until March 2026. This extension gives users more time to transition while ensuring critical security protections remain available. We still strongly encourage upgrading to a supported operating system to access the latest Firefox features and maintain long-term stability.

Note that this extension is also applicable for macOS 10.12-10.14 users running Firefox ESR 115.