Created attachment 500580 [details] stack trace There are two runTimeouts on the stack. That seems to match the comment above the assertion (in nsGlobalWindow::ResumeTimeouts).
(Bug 622218 comment 1 + yo dawg)
It's not clear to me why this assertion is even there... Asserting that is clearly bogus, imo. That said, can we just stop using the dummy timeout thing and just remove the subset of the list we plan to process in RunTimeout before processing it? Seems like that should make things Just Work, no?
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