Mozilla has been publishing official Firefox .DEB packages for over 2 years now. https://www.theregister.com/2023/11/01/official_mozilla_debian_firefox/ https:

Mozilla has been publishing official Firefox .DEB packages for over 2 years now. https://www.theregister.com/2023/11/01/official_mozilla_debian_firefox/ 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.