Man Vs UI is an open source Chrome extension developed by seanthedev123. This extension aims to give a fresh new look to Mr Plant's website, manvsmaths.com, while also providing users with added customizability. With this extension, users can enjoy a revamped design that improves the overall aesthetics of the website.

One of the main goals of Man Vs UI is to address Mr Plant's questionable web design skills and provide a more visually appealing experience for visitors. By using this extension, users can say goodbye to the old, gag-inducing design and enjoy a website that is easy on the eyes.