Chrome blatant spyware that scans your whole pc ever since google had the bright idea of sneaking an "antivirus" into chrome and enabling it by default. Firefox is better that chrome, but there's lots better than firefox.
This is why it is critical to have a meaningful alternative. Developers and end-users are pragmatic - all things being equal they will choose privacy and openness, but not at the expense of performance and capabilities.
This is why it is so perplexing seeing Mozilla just focus on everything except for the one thing that gives them relevance and is actually important.
For non chromium based, librewolf is a clear winner for me. Waterfox is also good. Hardened firefox is also okayish but not ideal.