I do this with my Hoppers with Sling. I am on dial-up (yeah I know, to cheap to go satellite, and no DSL/Cable available where I live). The initial connection to authenticate via Firefox takes a few minutes but after that it streams fine on my PC with HDMI out to my television. Decent quality as well, so it is using my home network to transfer after the authentication. It does stream better using the Dish Anywhere app on my S4, which has no data plan so I know it cannot be using cellular data, but I use the same network (connected to the internet via dial-up) versus using Firefox and the WebSlingPlayer add-on.