"How do you protect users from tracking without creating a backlash from the tracking industry and their customers?"
I don't see this as a concern for Mozilla. Google/Apple/Microsoft and their respective browsers sure, but the point of Firefox is to provide a browser whose goals align with the user. The industry's goals here have never aligned with users and it's about time (many, many years too late) that a major browser vendor ships this as part of the browser rather than an addon.
I agree about Mozilla's principles, but my point is that if there is a backlash they will have done something that is good in principle but which doesn't actually make the situation better for users. They'll end up with just as much tracking (but using different tech), more broken websites, etc.
I don't see this as a concern for Mozilla. Google/Apple/Microsoft and their respective browsers sure, but the point of Firefox is to provide a browser whose goals align with the user. The industry's goals here have never aligned with users and it's about time (many, many years too late) that a major browser vendor ships this as part of the browser rather than an addon.