They removed wording in their FAQ saying that they wouldn't sell data. It's a subtle distinction, and may or may not make a difference depending on your perspective.
It's just the paradox of when you present yourself as "the good guys" - people will hold you extra accountable for things that others easily get away with as nobody expects them to do better.
Unfortunately, Mozilla tends to shoot themselves in their foot this way somewhat often.
Being the good guys is the only reason anyone still uses Firefox. If Mozilla doesn't want to be the good guys, we'll use one of their many forks that remove the bad guy code.
Wasn’t Mozilla accused of selling data they collected from Firefox users?
Correct me if I’m wrong.