Download Firefox 12-51 52 Esr [portable] Official

If you are looking to download older versions of Firefox, specifically versions 12 through 51 52 Extended Support Release (ESR)

Door 51 swings in with urgency. Polished, faster, decisions made for speed and convenience. It promises slick rendering, fresher standards, a cleaner silhouette on mobile and desktop alike. But progress moves fast; what is rapid today can be ephemeral tomorrow. Extensions that once fit now scrape at the edges, and the checklist of vulnerabilities grows without mercy. Download Firefox 12-51 52 Esr