Mozilla has some information for customers of Debian-based Linux distributions (comparable to Debian, Ubuntu, Linux Mint, and others):
putting in, updating, and testing the newest Firefox Nightly builds simply obtained rather a lot simpler. We have arrange a brand new APT repository so that you can set up Firefox Nightly as a .deb package deal… These packages are appropriate with the identical Debian and Ubuntu variations as our conventional binaries. If you happen to’ve beforehand used our conventional binaries (distributed as .tar.bz2 archives), switching to Mozilla’s APT repository permits Firefox to be put in and up to date like another utility… You’ll not must restart Firefox after updating the package deal with APT…
For these of you who wish to use Firefox Nightly in a unique language than American English, we have now additionally created .deb packages containing the Firefox language packs.
Some context from 9to5Linux:
Again in April, I reported that Mozilla was providing a DEB package deal of the Firefox 113 launch throughout the beta testing section. Sadly, that was the one time a DEB package deal was obtainable for obtain and, after all, it did not make it into the ultimate launch of Firefox 113, nor future releases. It will seem that Mozilla wanted extra time to work on the DEB package deal for Debian and Ubuntu-based distributions, and it seems to be like it’ll lastly turn into a factor beginning with an upcoming Firefox launch, like Firefox 121 or later…
Utilizing the DEB package deal over Snap or the official binary package deal presents some advantages like higher efficiency attributable to superior compiler-based optimizations, hardened binaries with all safety flags enabled, entry to the newest Firefox releases as quick as potential [because the .deb is integrated into Firefox’s release process], and you will not must create your personal .desktop file anymore.