As the article says, only when it blew up.
The article also seems to say that he didn’t bother to disprove the mistaken findings and so Mozilla might’ve not even heard anything back until it blew up. The whole thing seems to have happened pretty quickly.
Yeah, I know. If I was in a sensible mood this AM, I probably wouldn’t have started this chain. But if you look back to my first comment, I did say it was probably a coincidence.