Download Firefox 12-51 52 Esr New! -

Follow these steps to download any version:

Are you looking to run these versions on Windows XP , or are you needing them for legacy web development ? I can provide specific configuration tips if you share your use case.

If you are downloading for a corporate environment, avoid standard version 52.0. You want . Download Firefox 12-51 52 Esr

Firefox 52 ESR was the final version to support classic Firefox extensions and themes built on the XUL/XPCOM framework. Firefox 57 (Quantum) completely dropped this support in favor of WebExtensions.

These versions are and do not contain modern security patches. Using them to browse the general internet poses a high risk of malware infection or data theft. Only use these versions for specific legacy tasks, such as accessing old internal hardware interfaces or testing legacy web code in a controlled environment. Follow these steps to download any version: Are

: Using outdated browsers like Firefox 52 ESR poses significant security risks as they no longer receive security patches. It is recommended to use these versions only for specific legacy tasks in a restricted environment. Portable Alternatives

Download the installation executable (e.g., .exe , .dmg , or .tar.bz2 ). Essential Post-Installation Configuration You want

You can find the direct installers for the versions you requested here: Firefox 52.9.0 ESR (Final v52 Release):

Released between 2012 and 2017, these versions introduced rapid release cycles, incremental performance improvements, and evolving web standard adoption.

Inside the version folder, choose the directory corresponding to your target platform: