Scary Productive is a behaviour training extension — it scares the hell out of you to train away visiting procrastinating websites when you shouldn’t.

Add a website you want to block in the options and when you try to go to a blocked page you will be redirected to a special video that will make you jump.

Active days & times
Choose the days and intervals during the day when you want to block websites. For example set the Active days only to work days and add the time interval to 09:00 – 17:00 so you won’t procrastinate at work or at school.