Firefox has extended its support for Windows 7, Windows 8, and Windows 8.1 until August 2026. Initially, support was set to end in February 2026 with version 115 ESR being the last compatible version. The extension allows Firefox 115 ESR to receive updates until the end of August 2026, responding to user demand for ongoing security updates on these platforms. After August 2026, users may need to upgrade their operating systems to continue receiving updates and new features. Firefox 115 ESR is currently the only major browser version supporting these older Windows systems.