Hmm, very interesting and weird. Only thing I can think of immediately, might be the addition to `gMessageListeners`.
Bug 1760012 Comment 3 Edit History
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Hmm, very interesting and weird. Only thing I can think of immediately, might be the addition to `gMessageListeners`. Edit: Could also be the changes to messageWindow.xhtml and messenger.xhtml, though I'm surprised that could result in a crash.