Achieve better productivity with this browser extension that allows you to block websites or apps you don't want to visit while you work. When you visit a blacklisted site, Serenity notes the amount of time it takes you to get back on track.

It features a mini cityscape and a main character whose goal is to finish their task overnight. Time in the virtual cityscape ticks by proportional to real time but speeds up whenever you visit a blacklisted website. So, if you want your virtual character to accomplish their presentation within the deadline, you have to steer clear from blacklisted web pages.