Find out what GPU mining is and how you can get involved
T-Rex miner is definitely mining, because my GPU and the fans are running, and nothing else is open besides my browser. Yesterday I started mining and it worked fine at about 17
Mining crypto in browser: GPU, WebAssembly, JavaScript and all the good things to try – Denis Radin - YouTube
Updated 2018 How to mine Bitcoin with GPU Video Card Windows 10 - YouTube