Because this is an older version, it is no longer available on the main Mozilla Firefox homepage . Using outdated browsers is generally discouraged due to security risks. However, if you require this specific version for legacy software testing or compatibility:
This version built upon the foundation of Firefox 84.0, which introduced several major performance and compatibility enhancements:
: You can find the original installation files for Windows, Mac, and Linux on the Mozilla FTP server .
: Firefox 84 was the last release to support the Adobe Flash plugin. Subsequent versions completely removed the ability to run Flash content.