> How is sharing data with partners in order to make Firefox commercially viable (i.e. getting money in exchange) not "selling data"? Anonymized or aggregated data is still data, and it's quite disingenuous of them to try to weasel it in by changing the definition.
This situation isn't perfect, but I disagree that this is particularly weasely or disingenuous. It's not black & white and there are meaningful differences here.
I think the assumption of 'selling data' and primary concern from most users is the sale of their identifiable personal data - i.e. telling advertisers "this user is interested in X", using their privileged position as a browser to track and collect that information. This is absolutely what Facebook is doing when they sell your data, for example.
The description here is suggesting that Firefox are still committed to never doing that or anything similar. That is the main thing I'd want to know, so that's great.
However, it sounds like they may be selling generic anonymous data in some way - for example telling Pocket what percentage of people use the Pocket extension, or telling Google what percentage of people change their search engine away from Google. Both of those are cases where you can imagine they might receive significant extra income from partners given that data, and they feel this is reasonable but means they can technically no longer say the 'never sell your data'.
You could consider that level of data sharing problematic of course. That said, there is spectrum of problems here, and personally (and I think for most people) I am much more concerned about the tracking & distribution of actual personal identifiable data than I am about generic metrics like those, if that is what's happening (unfortunately, they haven't explained much further so this is still somewhat speculation - I fully agree more precise language would be very helpful).