Comment: Pipelite to the rescue.

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In reply to comment: Netflix uses Microsoft's (see in situ)

Pipelite to the rescue.

Until Netflix switches to HTML5 there is another option called Pipelite.
http://www.webupd8.org/2013/08/pipelight-use-silverlight-in-...

This solution runs Silverlite in WINE and allows the Linux web browser to watch Silverlight Videos after overriding the User Agent.

This is preferable to the old solution of running Silverlight and Firefox in WINE or Using a Windows Virtual Machine.