> Killing one of its advantages over the Chromium engine, being able to have a fucking adblocker that's actually useful, and that nowadays is a fucking security feature due to malvertising, will be another nail in the coffin, IMHO.

Well, it would be a shot in the head. What would be the point of using Firefox if it can't block ads better than Chrome, and on mobile as well???

Doing so would not "bring in an additional 150 millions, or 50 millions, or 1 million! It would kill the product instantly.