Dunno about the this release, but till 24.4 it was simply a matter of removing some packages then holding/masking the primary snapd one, followed by manually adding the official PPAs for Mozilla’s stuff (or just use the Flatpak).
Of course, there’s still the philosophical and long term issues with staying on a distro that’s promoting and continuosuly expanding the thing you dislike…
My choice for now is Debian, didn't finish transition yet, very annoying to plan this in my schedule. I'll churn from Ubuntu after more than 15 years of daily driving... I also don't like ubuntu user with uid:gid 1000 in their Docker images. It's a cancer.
It was painful, with an endless laundry list of things to troubleshoot, tinker with, and add to my digital notebook in attempt to get anything resembling a personally ergonomic workflow.
I implore anyone to just go with Mint or anything else that takes care of ripping out snaps for you if you don't want snaps (but otherwise still like or are used to most things about Ubuntu). There were too many downstream and other issues, related and unrelated, for my sanity.
I initially tried to just use snaps but firefox was crashing quite often so I had to go with adding the mozilla's repository and of course configure the fake "firefox" package that actually installs the snap to be low priority for apt.
I was merely saying that you a couple commands you can uninstall snap and disable it from appearing ever again.