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Encrypted Media Extensions API

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The Encrypted Media Extensions API provides interfaces for controlling the playback of content which is subject to a digital restrictions management scheme.

Interfaces

MediaKeyMessageEvent: Contains the content and related data when the content decryption module (CDM) generates a message for the session.
MediaKeys: Represents a set of keys that an associated HTMLMediaElement can use for decryption of media data during playback.
MediaKeySession: Represents a context for message exchange with a content decryption module (CDM).
MediaKeyStatusMap: Is a read-only map of media key statuses by key IDs.
MediaKeySystemAccess: Provides access to a Key System for decryption and/or a content protection provider.
MediaKeySystemConfiguration: Provides configuration information about the media key system.

Specifications

Specification	Status	Comment
Encrypted Media Extensions	Recommendation	Initial definition

Browser compatibility

Feature	Chrome	Edge	Firefox (Gecko)	Internet Explorer	Opera	Safari (WebKit)
Basic support	35.0 (prefixed old version; ClearKey and Widevine) 42.0	(Yes)(PlayReady)	38.0 (38.0) (Primetime (Windows-only) and Clear Key; MP4 only) 47.0 (47.0) (Widevine (Windows and Mac); MP4 only) 54 (54) (Widevine and Clear Key in VP9)	11 (Windows 8.1+ only; prefixed old version; PlayReady)	31 (Clear Key and Widevine)	7.0 (prefixed old version of API without matching MSE support; FairPlay Streaming) 8.0 (prefixed and usable with MSE)
Secure contexts only	?	?	No support^[1]	?	?	?

Feature

Chrome

Edge

Firefox (Gecko)

Internet Explorer

Opera

Safari (WebKit)

Basic support

35.0 (prefixed old version; ClearKey and Widevine)

42.0

(Yes)(PlayReady)

38.0 (38.0) (Primetime (Windows-only) and Clear Key; MP4 only)

47.0 (47.0) (Widevine (Windows and Mac); MP4 only)

54 (54) (Widevine and Clear Key in VP9)

11 (Windows 8.1+ only; prefixed old version; PlayReady)

31 (Clear Key and Widevine)

7.0 (prefixed old version of API without matching MSE support; FairPlay Streaming)

8.0 (prefixed and usable with MSE)

Secure contexts only

No support^[1]

Feature	Android	Android Webview	Edge	Firefox Mobile (Gecko)	IE Mobile	Opera Mobile	Safari Mobile	Chrome for Android
Basic support	No support	43.0	(Yes)(PlayReady)	?	?	?	?	42.0
Secure contexts only	No support	?	?	?	?	?	?	?

[1] Firefox currently allows Encrypted Media Extensions to be used in insecure contexts, despite this not being allowed in the specification. This will be changed in the near future, and starting in Firefox 55, deprecation warnings are ouptut to the web console when this is done.

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https://developer.mozilla.org/en-US/docs/Web/API/Encrypted_Media_Extensions_API