If mozilla passed our anonymized data to a third party to enable a feature, that explains the change in vernacular. Many people consider this 'selling' because as with data brokers, there doesn't have to be a direct monetary transaction for mutual benefits to be traded. This was a good move, with a trigger happy crowd trying to take down our best support against data broker monopolies. We should be asking Mozilla to improve our ability to personally remove participation in this collection, not slamming them for clarifying their stance.