No that's not what they did. They had made promises about how they would handle issuing certs not in compliance with their CPS then went back on them, after a long history of similar things.
"Hey, just so you know, we did read your brown M&Ms clause, but since last month M&M is running a special promotion where they only make rainbow colours, we got you a bowl of yellow ones instead."
Which is the correct course of action:
"Of course. Thank you for paying attention to the spirit of the rule."
Or: "No, fuck you, show is cancelled."
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All of the stuff I said happened did happen. The extra context you are providing is irrelevant since it does not change the fact that what happened is stupid and it's Mozilla's fault that stupid stuff happened.
It's all brown M&Ms here.