The latest and final version of compatible with Windows 7 32-bit is version 115 Extended Support Release (ESR) . Because Microsoft and most other major browsers have ended support for Windows 7, Mozilla has transitioned all users on this operating system to the ESR channel to provide critical security updates. Why Use the Offline Installer?
, after which no further updates will be provided for this operating system. Key Download Information firefox windows 7 32 bit offline installer