The primary reason for using Waterfox Classic is its support for traditional Firefox extensions. These extensions could deeply modify the browser's behavior, interface, and functionality, unlike the restricted API model of modern WebExtensions (used by Chrome, Firefox, and newer Waterfox versions). 2. The "Classic" Firefox Interface

This comprehensive guide covers everything you need to know about finding, installing, and safely using older versions of the Waterfox browser. Why Users Look for Old Versions of Waterfox