what is the latest browser?

https://support.mozilla.org/en-US/kb/firefox-users-windows-7-8-and-81-moving-extended-support

Mozilla Firefox 116.0 and later requires Windows 10, 11 to run. Firefox 115 ESR is still being updated with security/stability fixes so the EOL Windows 7, 8, 8.1 and macOS 10.12, 10.13, 10.14 OS users can have a secure web browser to use still.

Hello

Apparently, a new Firefox Release Calendar has been published https://whattrainisitnow.com/calendar https://whattrainisitnow.com/release/?version=esr

As for me, i installed Linux, in dual-boot with Windows7

Install Firefox on Linux https://support.mozilla.org/en-US/kb/install-firefox-linux

As for me, System Firefox installation (for advanced users) that's my installation