Do not run an old version of Waterfox using your current browser profile. It will likely corrupt your bookmarks, passwords, and history. Use the Profile Manager ( waterfox.exe -P via the Windows Run dialog) to create a dedicated, isolated profile specifically for the older version. 2. Disable Automatic Updates Immediately
Waterfox was forked from Firefox in 2011 by Alex Kontos (a 16-year-old student). The core promise: .
By 2021, Waterfox Classic (version 2020.10) was running on a Gecko engine from 2017. It lacked support for: waterfox browser old version
While downgrading solves customization issues, you must weigh the benefits against significant security and usability trade-offs.
Use . Set it to "default deny" for all sites except those you trust explicitly. Do not run an old version of Waterfox
The latest Waterfox version includes crucial security updates that protect you from malware and phishing attacks. Running an old version leaves you vulnerable.
While the latest Waterfox offers better security and modern web standard compliance, older versions have a dedicated following for several reasons: By 2021, Waterfox Classic (version 2020
It may run, but it is not optimised for it, and no one is testing it on Windows 11. Use at your own risk.
This is the current, mainstream version of Waterfox. It is based on modern Firefox Rapid Release (RR) and Extended Support Release (ESR) codebases. It supports modern WebExtensions and offers top-tier speed and security but lacks legacy extension support.