: Developers sometimes use it to test how legacy sites render on the Gecko 1.9.2 engine.
To download the old version of Mozilla Firefox 3.6, you must access the Official Firefox Release Archive hosted by Mozilla. This archive serves as a public repository for every version ever released, though Mozilla strongly advises against using such an outdated browser due to critical security vulnerabilities. How to Download and Install Firefox 3.6
While mostly obsolete, some users still seek version 3.6 for specific technical reasons:
: It maintains compatibility with older XUL-based extensions that were disabled in later "Quantum" updates.
: Click the folder corresponding to your language (e.g., en-US for US English).
