===== Is Nightly available as a .deb/.rpm? =====
As of October 2023, we now officially provide a .deb repository for Debian-based distros(example: Ubuntu, Debian, Mint, etc). See:
[https://blog.nightly.mozilla.org/2023/10/30/introducing-mozillas-firefox-nightly-deb-packages-for-debian-based-linux-distributions/ Introducing Mozilla’s Firefox Nightly .deb Package for Debian-based Linux Distributions]