Anonymous telemetry is more than justified if it improves system stability. I don't think they do remotely the tracking other browser vendors like Microsoft or Google do.
Except when the browser won't start, and then loses all your previous session, because your internet is out when you start it and so it can't do whatever 'necessary' telemetry and verification it needs.
Yes, just happened to me. Not happy about losing my session. Even less happy about the dependency and what might be being telemetered or 'verified'.
