If they refactored Firefox OS to be a ChromeBook competitor, sure. They heavily marketed their phones to the developing world markets.

I may be wrong, but I have a suspicion that Chromebooks only got a foot in the door in the education sector because they had such a large marketing machine behind it. I wouldn't mind betting money that Firefox wouldn't be able to get an equivalent foothold (even comparable to their browser market share right now with like-for-like hardware and form factors) just because their exposure for any given initiative is a fraction of what Google can summon.