Public bug reported:

I get an error playing DRM-restricted content with the Firefox 56.0 that
comes with Ubuntu 16.04, but not with the Firefox 56.0 that I download
from Mozilla.

Specifically, if I go to https://bitmovin.com/mpeg-dash-hls-drm-test-
player/ with the Firefox 56.0 included with Ubuntu 16.04, the video box
in the middle of the page displays static with the error message "DRM:
Failed to create and initialize a MediaKeys object". If I instead
download Firefox 56.0 from
https://ftp.mozilla.org/pub/firefox/releases/56.0/linux-x86_64/en-
US/firefox-56.0.tar.bz2 and extract and run that Firefox, the video will
correctly start after I click play.

In both cases Firefox is configured with:
* about:preferences > "Play DRM-controlled content" checked
* about:addons > "Widevine Content Decryption Module provided by Google Inc." 
v1.4.8.1008 installed and set to "Always Activate"

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New

** Package changed: apparmor (Ubuntu) => firefox (Ubuntu)

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https://bugs.launchpad.net/bugs/1724705

Title:
  Firefox error: "DRM: Failed to create and initialize a MediaKeys
  object"

Status in firefox package in Ubuntu:
  New

Bug description:
  I get an error playing DRM-restricted content with the Firefox 56.0
  that comes with Ubuntu 16.04, but not with the Firefox 56.0 that I
  download from Mozilla.

  Specifically, if I go to https://bitmovin.com/mpeg-dash-hls-drm-test-
  player/ with the Firefox 56.0 included with Ubuntu 16.04, the video
  box in the middle of the page displays static with the error message
  "DRM: Failed to create and initialize a MediaKeys object". If I
  instead download Firefox 56.0 from
  https://ftp.mozilla.org/pub/firefox/releases/56.0/linux-x86_64/en-
  US/firefox-56.0.tar.bz2 and extract and run that Firefox, the video
  will correctly start after I click play.

  In both cases Firefox is configured with:
  * about:preferences > "Play DRM-controlled content" checked
  * about:addons > "Widevine Content Decryption Module provided by Google Inc." 
v1.4.8.1008 installed and set to "Always Activate"

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1724705/+subscriptions

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