> Firefox, almost impossible to use the web due to non-stop bot checks by CF. For the same session, same site(s), I give up and use Chrome, with all the same browser extensions, and I sail right in.

This is very much not my experience. I don't know if you use a VPN or have a ton of extensions but if I was hitting that so hard I'd consider trying a clean profile with no extensions and adding things back in to see if you can find the trigger condition.