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gmp-widevinecdm installed with Firefox 49.0.1 update, what is it?

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Firefox just updated itself to 49.0.1 even though it did not click to install. I have update set to notify me but 'DO NOT INSTALL!' I noticed Norton Security inspecting gmp-widevinecdm.dll and Google was the author. What exactly is this and Do I need it?

Firefox just updated itself to 49.0.1 even though it did not click to install. I have update set to notify me but 'DO NOT INSTALL!' I noticed Norton Security inspecting gmp-widevinecdm.dll and Google was the author. What exactly is this and Do I need it?

Chosen solution

https://www.widevine.com/wv_drm.html

It is used for Multiplatform Content Protection for Internet Video Delivery. IOW, as a standardized DRM module using Encrypted Media Extensions (EME) per W3C standards.

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Chosen Solution

https://www.widevine.com/wv_drm.html

It is used for Multiplatform Content Protection for Internet Video Delivery. IOW, as a standardized DRM module using Encrypted Media Extensions (EME) per W3C standards.