Okay wait, wait, wait a minute. I've just noticed something.
*Is the ad measurement feature actually reflected in Firefox's privacy policy?*
The act of booting up this new Firefox somehow opened this copy of the Firefox privacy policy:
https://www.mozilla.org/en-US/privacy/firefox/
"Effective May 13, 2024".
(Not sure how this opened. If I click "privacy policy" in About, I get this other URL:
Which is marked "September 9, 2020". That seems extremely out of date. Unsure what THAT'S about)
Anyway, May 13 is fairly recent, but it's two full months before the ship of Firefox 128. I'm skimming this policy and I do not see an explanation of, or reference to, the Ad Measurement feature (am I missing something??)
Did Firefox actually ship, *and enable by default without user notification*, a feature specifically designed for reporting to advertisers via a backchannel what ads the browser has seen, *without first updating their privacy policy to disclose it???*