As opposed to the case where you don't have a link preview, and you click on a website to see what it contains, and they get your IP. The author seems to think Mozilla should have protected our privacy by having someone act as the proxy for the request. Because involving a thirds party that receives all these requests and does work for us for free is absolutely how we protect our privacy.
But that is exactly what Mozilla is telling us -- trust us.
Why was the feature added if my browser is going to browse to the page anyway? What is the value add? I was looking for some way for it to make sense - ah right, it could be a privacy preserving feature - I can preview the link and verify whether I want to visit it before I actually visit it. But that isn't how it works.
Yes, a feature clearly designed for pushing onto that juicy "people with mobility impairments" userbase.
Love that you ignore all of the people who are currently seeing the popups and not understanding why.