[rcthompson]

They make it nearly impossible to avoid snap. Every couple of upgrades, they unconditionally run a script that forcibly removes the Firefox deb and installs the snap. Nothing I've tried has been able to prevent this. It seems to be hard coded somewhere.

So it's kind of like saying "well you don't have to stay in the pit" except you keep pushing me in the pit every time I climb out.

[Andys]

I'm not finding this to be the case, on every computer I now uninstall snapd completely and use the firefox-esr PPA (mentioned elsewhere), and I am able to apt-get dist-upgrade regularly with no problems.