It's a small thing I started doing years ago: whenever I see a loose nail or screw in the street I'll always pick it up and put it in the nearest trash so nobody gets a flat tire or steps on it. Small, but hopefully saves some potential misery for someone.
If this is due to a single employee making a mistake then I would be inclined to question Mozilla's policies for removal of popular extensions more than fire the employee.
That's kind of hilarious. 😆