Pipelight consists out of two parts: A Linux library which is loaded into the browser and a Windows program started in Wine. The Windows program, called pluginloader.exe, simply simulates a browser and loads the Silverlight DLLs. When you open a page with a Silverlight application the library will send all commands from the browser through a pipe to the Windows process and act like a bridge between your browser and Silverlight.
Install pipelight on ubuntu
Open the terminal and run the following comamnds
sudo apt-add-repository ppa:ehoover/compholio
sudo apt-add-repository ppa:mqchael/pipelight
sudo apt-get update
sudo apt-get install pipelight
You may need to accept a license agreement for a set of fonts during the installation. After it's done just start your browser, type about:plugins in the addressbar and hit enter -- if the installation went well you should now see Silverlight in your plugin list and everything is ready to run! Pipelight will install Silverlight on the first start of your browser, this may freeze the interface for several minutes (and you may just see a blank page without any progress). There might appear some dialog asking if Mono or Gecko should be installed during the Silverlight installation -- you can safely choose no, as this is not necessary to get Pipelight running. After this step, the overall performance of your browser shouldn't be affected any more.
If you prefer to use Pipelight using your existing version of Wine and Silverlight, you need to invoke apt-get with the following parameter:
sudo apt-get --no-install-recommends install pipelight