@jwildeboer The problem with DNF was always that it was a "please don't do this" and not a technical barrier to doing whatever tracking the user was trying to opt out of.
It was obvious from day one that it wouldn't be honored. Asking the same industry that has conducted a decades-long campaign to thwart every actual barrier to preventing pop-ups and trackers "pretty please don't track" is silly.
I wrote about it at the time they proposed it, but I can no longer find the article.