You make it sound like we could decide to have Firefox collect your PII without your consent. We won't. The standards for the collection of category 4 data are

You make it sound like we could decide to have Firefox collect your PII without your consent. We won't. The standards for the collection of category 4 data are "Default off. May be eligible for opt-in data collection by specific users, provided there is (i) advance user notice (ii) consent and (iii) an opt-out." The only collection of this data that I'm personally aware of is the Firefox Pioneer program. https://support.mozilla.org/en-US/kb/about-firefox-pioneer https://support.mozilla.org/en-US/kb/about-firefox-pioneer (Disclosure: I work for Mozilla)