I await to see technical enforcement of it. Anyone can write rules on a piece of paper, but without collecting information physically, or having someone enforce it, it's useless words. And so far it seems a lot of people and companies make rules and claims without technological enforcement.
I imagine though at worst you can simply block all of mozilla's domains through /etc/hosts and their IPs or IP range with a firewall rule. Still sucks but you do not need to comply with it, no matter what anyone says. It's the technical aspects that are the most thorny, not the words on a page.
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