> uBO is THE killer extension
Now that you say that, I wonder if that's Google's end game: keep Mozilla on the payroll, disincentivise them from innovating on their product and wait for Firefox to slowly bleed users until nobody is using them and solidify Chrome's position. And that's how they take care of adblockers. They already have wide control over Chromium so that would only leave Safari as the last viable browser alternative (a much harder product to attack).
Now, Google can't stop Firefox from allowing ad blocker extensions, but they can encourage Mozilla to run Firefox in all but abandonware mode, until it dies out.
It's embarrassing how hard the Mozilla Foundation has fumbled their position and I'm having a hard time attributing their actions simply to incompetence.