I made a Chrome Extension, Rick Roulette, which swaps videos out with RickRolls (rickroulette.com)

Not quite sure why :).. might come in handy for pranking people. If nothing else, I think it gives a good overview on scaffolding out a quick simple Chrome extension.

Please do let me know if you see anything I could have done better.

https://github.com/ben174/rick-roulette