for anybody that wants to disable it, go to the settings and search for “Allow websites to perform privacy-preserving ad measurement”
(or through the dom.private-attribution.submission.enabled
flag in about:config
)
https://support.mozilla.org/en-US/kb/privacy-preserving-attribution
Sorry, it was unclear in my comment. By “it’s actually part of the Mozilla Corporation” I was referring to Firefox, not Mozilla Foundation