Leaving the ethical discussion aside; from a practical standpoint this won't impact anyone worried about privacy using Firefox unless they insist on not using a

Leaving the ethical discussion aside; from a practical standpoint this won't impact anyone worried about privacy using Firefox unless they insist on not using an ad-blocker (which would be add odds with caring about privacy¹). This feature would only be used if you click on (or perhaps just encounter?) an ad and eventually buy something on the target website. 1: Or just caring about your mind constantly battling distractions.