Open up synaptic package manager from System>Administration and search for moonlight. It is the linux version of silverlight. Install the package called "moonlight-plugin-mozilla"

Or install this extension:

• http://www.go-mono.com/moonlight/download.aspx

did not work. I received the following error. Novell Moonlight" could not be installed because it is not compatible with your Firefox build type (Linux_unknownABI). Please contact the author of this item about the problem.