As a Time Warner customer I wanted to watch some programming on my desktop that uses Ubuntu 12.04 as the operating system. The steps below install a pluggin for the Firefox browser. Here is what I did. From the terminal (Ctrl+Alt+T):
sudo add-apt-repository ppa:pipelight/stable
sudo apt-get update
sudo apt-get install pipelight
Then, start Firefox and type about:plugins in the address bar and hit enter. Pipelight will install when you first open the browser. After the installation is completed you should see "Silverlight" in your plugin list and you are ready to go.