At ContaAzul, we had 31 Windows machines powering our Selenium tests - one running the grid and 30 more running clients. Needless to say, this is very expensive. As we are already using Docker to run our builds (on Shippable), we decided to try it out to run Selenium tests too. It was no surprise that Selenium folks already made a ready-to-go set of Docker images. There is an image for the Seleniu