It is the official lifeline for older operating systems. For example, Firefox ESR 115 is the final version supporting Windows 7, 8, and 8.1.
Users who dislike frequent interface updates or "breaking" changes in their daily tools often prefer the predictable ESR cycle. How to Download Firefox ESR for Windows download firefox esr for windows
Universities and businesses use it to maintain a consistent browsing experience across thousands of machines without frequent UI changes. It is the official lifeline for older operating systems
While anyone can use it, Firefox ESR is specifically tailored for: How to Download Firefox ESR for Windows Universities
To ensure you are getting a secure and official version, always download directly from Mozilla.
Firefox Extended Support Release (ESR) is a specialized version of the Firefox browser designed for organizations and users who prioritize long-term stability over the latest bleeding-edge features. While the standard version of Firefox updates every four weeks, Firefox ESR receives major updates only once a year, focusing instead on critical security and stability patches.