Mozilla has been publishing official Firefox .DEB packages for over 2 years now.
https://www.theregister.com/2023/11/01/official_mozilla_debi...
No need for any Canonical packages at all -- works fine on Debian; I use them myself.
https://www.theregister.com/2023/11/01/official_mozilla_debi...
No need for any Canonical packages at all -- works fine on Debian; I use them myself.
You can still get firefox as a .deb though.
https://launchpad.net/~mozillateam/+archive/ubuntu/ppa