Ah yep, that's the sort of mad poll loop I saw on Leap Second Day. I can't say for sure I've seen that any other time, though I will be popping up strace next time I see Firefox running up the cycles.
Posted Jul 10, 2012 1:01 UTC (Tue) by dlang (✭ supporter ✭, #313)
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It's a race condition of some sort inside firefox. I'm one of those crazy people who have a couple hundred tabs open across a dozen or so windows and I've seen many cases where on startup, firefox would go into this mad loop. Just killing firefox and trying again would eventually get it out of the loop and operating sanely.