I am basically the same. I’m loving the ability to use uBlock Origin across phone and desktop and practically never see ads, but some sites just don’t work for me in Firefox. Like anything where I have signed up with my Google account, or my online banking. In which case I have Chrome installed as a backup. If I could purge it completely I would, but this works for now.
I am having the same thing at the moment with the Firefox snap package under Ubuntu. Except as well as this, when it updates it seems to take out everything else pinned to the task bar with it. Maybe it’s not Firefox doing that, but since I stopped pinning FF it has stopped happening.