Every time you tab into a time-eating website, Delayed Gratification gives you 15 seconds to make sure you actually wanted to do that. Because, let's face it, it's mostly just muscle memory at this point.
Click on the hourglass icon in your browser to add "bad websites" and update your time settings.
NOTE: Delayed Gratification is currently in beta. Please contact firstname.lastname@example.org with any bugs or suggestions.