Comment 45 for bug 294712

The thing is, content policy has a built-in notion of different sorts of blocking... You can block a server, or a request, or a type, and we handle those a bit differently in terms of whether we, e.g., show alt text. It would be ideal if we allowed content policies to just opt into the "right" behavior here, whatever that is.

Wladimir, do you have an thoughts on this?