Scroll to find the specific version number you need (e.g., 52.9.0esr or 45.0 ).
Steps to obtain an old Firefox build safely
Select your platform directory ( win32 , win64 , mac , or linux-x86_64 ). Download Firefox 12-51 52 Esr
Legacy versions do not receive security updates. Browsing the modern web on these versions exposes you to significant risks, as newer exploits are not patched in older codebases. Profile Compatibility:
Downloading outdated software carries inherent security risks. Third-party mirror websites frequently bundle old browsers with malware, adware, or tracking cookies. Always pull files directly from official repositories. Scroll to find the specific version number you need (e
: Go to the Official Firefox Release Archive.
Below is a comprehensive guide to understanding, downloading, and safely using Firefox versions 12 through 51, as well as the famous 52 ESR. 📥 Direct Download Links Browsing the modern web on these versions exposes
: Final version to support legacy NPAPI plugins like Java and Silverlight.