If you need a modern stable version for a newer OS, download the latest Firefox ESR or the standard browser from Mozilla's homepage .
After some research, John discovered that Firefox 52 ESR (Extended Support Release) was a special version designed for organizations and businesses that needed a stable and secure browser for a longer period. It was also suitable for people who didn't want to deal with the frequent updates of the regular Firefox version. Download Firefox 12-51 52 Esr
Final note Choose deliberately: nostalgia, speed, or steadiness each has a cost. Let your needs — security, compatibility, or stability — decide which door you open. If you need a modern stable version for
To download specific older versions of Firefox, including the Extended Support Release (ESR) versions like 52, you should use the official Mozilla FTP Archive Official Download Links Final note Choose deliberately: nostalgia