Without knowing anything about Apture's implementation, I'm reasonably certain you could block it with NoScript. For highlight, just wait until it comes up the

Without knowing anything about Apture's implementation, I'm reasonably certain you could block it with NoScript. For highlight, just wait until it comes up then block "highlight.cloudflare.com" (or whatever). While I don't like NoScript's default behavior, it's a godsend if you allow all globally and just blacklist domains you dislike.