Unfortunately most people seem to be simple enough to be manipulated into politics, so politics are in everything now. I have taken the stance of not caring about it unless it’s in my face in the actual software. I don’t have to interact with the developers of the software I use, or hear about anything they have to say online, that does not relate to the software they produce.
Back to topic: Mozilla has updated their TOS somewhat to “clarify” it, but they fail to explain any of their choices. They also commented on why they removed any reference to selling data from their FAQ and actually said they do share your data for advertising and suggestions, if you have them turned on, which by default, they are on the official binaries from mozilla. They do fail to mention the new AI features that are also turned on by default now, afaik, but at least with that I think you have to choose a provider yourself for it to do anything(?) Anyways they still retain that they do not sell our data, per say.
I’m not sure how we are supposed to think sharing our data for free is any better than selling it, or how we are supposed to believe they are just sharing the data they collect for absolutely no monetary value at all in the first place. 
EDIT: So in the definition they themselves are stating, citing california legislation, they are absolutely, without a question, selling our data. They should just come out and say it. Vague legal language should not protect them in case there is confusion about it, since confusion is the only goal they have when using such vague language in the first place.