"Mozilla spends $200M on it per year" does not mean it costs $200M per year. Considering Mozilla overspends on everything else, it's not a stretch to think they might be overspending on this too.
> Considering Mozilla overspends on everything else
That something is repeated endlessly does not make it true. In fact, it's a signal of disinformation (which doesn't make it false). And when words are used like "everything", it suggests 'nothing' specific is really known. And even to the degree it's true, the inference is weak; the question is, how much does web browser development cost?
$200M seems reasonable to me. Comparisons I've seen make it quite a bit less than estimates of Google's costs, for example.
