I’m not commenting on implementation itself but rather on how Mozilla went about with an opt-out approach into the collection program (even if it was for testing) to a community they have cultivated with the promise of privacy.
Collecting my data is a big deal. It doesn’t matter how it is used. I should at least consent to it.
I really hope they adopt this. Not just for tech. To me, the world would become a little bit more interesting with a payment card called a DomCard™ in it.