Safari hangs
I know that whenever I get a human verification check served by Cloudflare that my Safari browser is done -- the Cloudflare puzzle doesn't even load. I can still use all the tabs that are open, but trying to access new sites doesn't do anything at all. Additionally, terminating Safari and restarting does absolutely nothing to resolve the issue.
The root of the problem appears to be com.apple.Safari.SafeBrowsing.Service. When I shutdown Safari there are several processes that linger -- this being one of them. When this problem occurs a "kill <process-id>" of the process id for this service does not stop it -- only a "kill -9 <process-id>" works.
Once this process is killed and Safari is restarted, then all is well. The problem is that a lot of sites use Cloudflare, so you never know when you'll face it and Safari will then die.
MacBook Pro 16″