Linux Capable published a tutorial about installing Waterfox Browser on Debian 11 Bullseye.
How to Install Waterfox Browser on Debian 11 Bullseye
Learn how to install Waterfox Browser on Debian 11 Bullseye Linux using the command line terminal and optional current or classic instructions.
How to Install Waterfox Browser on Debian 11 Bullseye - LinuxCapable