A proposal has been submitted for having Microsoft Silverlight plug-in support in Ubuntu 14.04 LTS as part of the main archive via the Pipelight project



From Phoronix:

The Pipelight open-source project was first covered by Phoronix over the summer as a way to get full Microsoft Silverlight support working within web-browsers using Wine for running the Microsoft Silverlight support. This Pipelight implementation of Silverlight works with NPAPI-based browsers like Firefox and is good enough to handle running Netflix and other Silverlight browser-based programs on Linux. Previous to that there was work in 2012 for a patched version of Wine to get Netflix on Linux.

Microsoft hasn't officially provided any Silverlight support and until the advent of Pipelight there was only the Mono-based Moonlight for providing Silverlight support inside Linux web-browsers. Work on Moonlighth as pretty much ceased as has Microsoft's upstream interest in Silverlight seems to be diminishing but there's still many web applications requiring this Microsoft technology.

  Microsoft SIlverlight Proposed For Ubuntu 14.04 LTS