Download Firefox 12-51 52 Esr |top| May 2026

Download Firefox 12-51 52 ESR: A Comprehensive Guide

How to download Firefox 12–51 or 52 ESR

Guide to Downloading Legacy Firefox Versions: 12-51 and 52 ESR

Select your operating system (e.g., win32 , win64 , mac , or linux-x86_64 ). Download Firefox 12-51 52 Esr

high security risks

Using versions 12–51 or 52 ESR in 2026 poses . These browsers lack modern protections against web vulnerabilities. It is strongly recommended to use the Current Firefox Release for daily browsing. Download Firefox 12-51 52 ESR: A Comprehensive Guide

Firefox 52 ESR (Extended Support Release) is a version of Firefox that receives security updates and bug fixes for an extended period. To download Firefox 52 ESR, follow these steps: Firefox 52

• Firefox 52.9.0 ESR for Windows XP: archive.mozilla.org/pub/firefox/releases/52.9.0esr/win32/en-US/Firefox%20Setup%2052.9.0esr.exe
• Firefox 12.0 for Windows 7: archive.mozilla.org/pub/firefox/releases/12.0/win32/en-US/Firefox%20Setup%2012.0.exe