Published by Chris Coyier
Jake Archibald put together an interesting and informative quiz about when browsers actually make requests. I learned a bunch. Some of it might seem like quirky academic knowledge but we all know how often unpredictably weird situations come up in day to day dev work.
Jake wished me to point out that it is unfinished (only works on desktop Chrome) and might hurt your feelings if you can't take browser insult jokes.