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To disable:
user_pref("dom.private-attribution.submission.enabled", false);
Alternatively you can do the same through Settings -> Privacy & Security -> Website Advertising Preferences and uncheck “Allow websites to perform privacy-preserving ad measurement”
Yup, but that’s already mentioned in the article. Thought I’d give people the exact userpref, so they can modify their custom
user.js
if they have one.