We do not deserve Mads Kristensen and the amazing extensions he makes for Visual Studio.

What kind kf extension has he made?

This is most likely the extension he's most popular for: https://marketplace.visualstudio.com/...

It installs a bunch of other extensions he's made, but it essentially converts ASP.NET & MVC Visual Studio projects into a full development environment for web standards. Compile and bundle SASS in VS, JSX, etc. Image Optimization, npm install within the VS project, syntax highlighting for webpack... It goes on and on.