Silverlight and linux are not friends.

This is the Tutorial from which i could watch movies for silverlight successfully on my Ubuntu Machine. Pipelight Installation

So for Ubuntu you have to do some little things … For my personal recommends i added chromium to split the usage of a normal browser and a dedicated one.

 sudo add-apt-repository ppa:pipelight/stable
 sudo apt-get update
 sudo apt-get install --install-recommends pipelight-multi
 sudo pipelight-plugin --enable silverlight
 sudo apt-get install chromium-browser

go out there and Happy Silverlighting…