I switched to Opera because Firefox forces invasive updates that require a forced restart. For someone who likes to keep a web browser running for a long time and put their laptop to sleep rather than shutdown, that is not acceptable.

I use Linux so I could get around that by excluding the package from updates but I don't want to run an outdated web browser that might have security vulnerabilities.

I raised this a few times on their Reddit page, but it became so disturbing to my workflow that I just had to stop using it. Chrome is not a sane alternative, so I resorted to Opera. Good old Opera.