Because Waterfox Classic is now a legacy project, it is no longer the "main" download on the official Waterfox homepage. To get the correct version:

The primary draw is its ability to run "classic" Firefox extensions (XUL and XPCOM) that were discontinued in Firefox version 57.

Built specifically for 64-bit systems, it was originally designed to provide better performance and stability than early 32-bit Firefox builds. Where to Safely Download Waterfox Classic

If you are looking to , here is a comprehensive guide to its features, safe download locations, and critical usage tips. Key Features of Waterfox Classic