Good points, but again: I would assume advertisers track/fingerprint you anyway, so we are not speaking about getting anonymized information from Mozilla but IMHO we are speaking about getting one more data point about you, which is easy to de-anonymize in combination with the rest of the information known about you.
One is not enough, and a lot of great movies where already named, still, some great movies are missing:
… from the top of my mind. :-P