In my specific case, I use an extension (Pocket) for chrome that creates a frame. White-listing the site (getpocket.com) doesn't work, because frames are blacklisted by default.

I tried to add the frame to the global whitelist, and, if I change the scope to global from domain, it works, but then I lose the domain specific rules.
I expected that domain scopes will automatically use whatever rules they find in the global scope, but that is not the case.

One solution would be to remove frame from the blacklist, but that is not something I'm keen on.
Is there a way to specify an exception to the blacklist, i.e. blacklist every frame except the ones coming from this domain?

DOMAIN SCOPE

GLOBAL SCOPE