Mozilla has extended the support for the ESR version of Firefox 115 to March 2026 (the support period was initially set to expire in March 2025, but was renewed until September). Firefox 115 is the last version that can run on Windows 7, 8, and 8.1 operating systems, as well as MacOS 10.12, 10.13, and 10.14.
According to statistics provided by Mozilla, there is still a significant number of Windows 7 users who rely on Firefox, despite Microsoft ending support for the operating system in January 2020. Unlike Google Chrome, which discontinued support for Windows 7 and 8 in February 2023, Firefox remains the only major browser that continues to support these older Windows versions.
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