Are you asking how can you install and use current Firefox versions on Windows 7 ? Firefox 116.0 and later requires Windows 10, 11 to run so the most current you can run is the still supported Firefox 115 ESR which you appear to have. It is currently at Fx 115.18.0esr and will be supported up til Fx 115.21.0esr in March 2025 unless Mozilla decides in early 2025 to extend updates again. https://support.mozilla.org/en-US/kb/firefox-users-windows-7-8-and-81-moving-extended-support