What does "Switch to Mobile/Desktop" in the bottom left of the Vlr.gg website do? I'm always defaulted to the Mobile thing. But I don't understand what it does. It works fine
Try doing it on a phone, or restricting your viewport to be small on your browser, it changes to a responsive design. It sends a get request, which determines which type of styling the web server will deliver to you.
The CSS files delivered to you if you have mobile enabled:
https://fonts.googleapis.com/css?family=Roboto:400,400italic,300,700,500
https://www.vlr.gg/css/base/main.css?v=95
https://www.vlr.gg/css/base/r.css?v=21
https://www.vlr.gg/css/base/pages/home.css?v=22
https://www.vlr.gg/css/base/pages/r/home.css?v=4
The CSS files delivered to you if you have desktop enabled:
https://fonts.googleapis.com/css?family=Roboto:400,400italic,300,700,500
https://www.vlr.gg/css/base/main.css?v=95
https://www.vlr.gg/css/base/pages/home.css?v=22
So just two extra CSS files it seems.