Gregory's ServerRead the #Firefox CTO's reddit note. The words that come to mind: "#mealymouthed" and "#gaslighting the userbase".
Adding ways to track user behavior, anonymous or not, is the opposite of privacy protection. Pleading that this way gives an outlet for advertising "safely" is gaslighting. FF didn't have to do this. & opt-out? That's just #Evil.
But we get it, the masters of #Mozilla are the main funders - Google, not Firefox users. At least have the courage to own it.