It flickers for longer than what the timeout is set to, which makes me think that it takes a split second for the extension to run. But no, I couldn't figure out a better way to get it to fire than wrapping it in a timeout :( An event listener for DOMContentLoaded didn't do the trick either.
Anyone else been finding the new github header distracting? I sure have. Ever feel nostalgia for the way things were? I do everyday. Well now you can go back to github’s normal header with this simple plugin.