The "old version" of the Waterfox browser remains a specialized tool for users who prioritize legacy extension support and a classic user experience over the security benefits of modern browsers. While it offers unparalleled customization for a "classic" interface, it is highly recommended only for specialized, controlled environments, rather than as a primary, day-to-day web browser in 2026.
The safest repository for any historical Waterfox release is the official GitHub Releases page. Navigate to the Waterfox repository on GitHub. Click on the tab.
If you are downgrading, Waterfox includes to prevent corruption of your profile data.
Simply running an old installer over a newer version can corrupt your browser profile, leading to crashes, lost bookmarks, and missing passwords. Follow these steps to downgrade safely. Step 1: Back Up Your Profile Data
