Download ((install)) Firefox 12-51 52 Esr -

However, the crown jewel of this version range is undoubtedly . This specific version is arguably the most important legacy browser download for enterprise and retro-computing users. Firefox 52 ESR occupies a unique position in history: it was the final mainstream browser to support legacy extensions and the final version to fully support Java Applets and other NPAPI plugins (with the exception of Flash).

These versions are years out of date. They lack modern defenses against malware, phishing, and tracking. Download Firefox 12-51 52 Esr

Once installed, Firefox will immediately try to update itself to the newest version. To prevent this, go to Options/Preferences > General > Firefox Updates However, the crown jewel of this version range