I happened across a thread on Lemmy recently that discussed the usefulness of certain extensions, and this "Don't Bother" section of the Arkenfox wiki was linked:
https://github.com/arkenfox/user.js/wiki/4.1-Extensions#-dont-bother
A lot of conventionally useful extensions like Privacy Badger, HTTPS Everywhere, Decentraleyes/LocalCDN, etc are apparently not necessary (at least in Firefox) if you have certain browser preferences selected, like Strict Mode/Total Cookie Protection.
I felt outdated cause I still run Privacy Badger and Decentraleyes in my Firefox environments, but it was nice to see that a lot of these "extra" features that used to require extensions are now options built into the browser (or Firefox, at least).
I've had this same experience on Linux Mint. I'll run apt update & apt upgrade and, occasionally, if Firefox is one of the things being updated, new tabs and new pages won't load and will tell me I need to do a system restart to continue browsing.
I always update manually, so it never happens without me initiating the update first. But sometimes I'm like, "Dangit, didn't realize this update would require a restart to keep using Firefox."