Add about:config rules for preventing Firefox from downloading and enabling the Widevine CDM by Google #509

2018-08-20T12:27:48Z

gaborluk commented

2018-08-20 12:27:48 +00:00

(Migrated from github.com)

Description

Firefox automatically downloads and installs the Widevine Content Decryption Module provided by Google Inc. (the Widevine CDM for short).

There are two (apparently undocumented) about:config rules that deal with this plugin: media.eme.enabled and media.gmp-widevinecdm.enabled.

The recommended settings

media.eme.enabled = false
This is equivalent to unchecking the Play DRM-controlled content checkbox in the Options, and it will disable playback of DRM-controlled HTML5 content, which, if enabled, automatically downloads the Widevine CDM. This setting automatically uninstalls the Widevine CDM plugin. Setting media.eme.enabled to true again automatically reinstalls it.

media.gmp-widevinecdm.enabled = false
This is equivalent to selecting Never Activate from the dropdown menu of the Widevine CDM plugin, and works whether the plugin is currently installed or not. If the plugin has been uninstalled by media.eme.enabled = false, and media.eme.enabled is set to true again, this setting will prevent Firefox from automatically installing and activating the plugin until media.gmp-widevinecdm.enabled is also set to true explicitly.

More information in Firefox Help

HTML Preview

http://htmlpreview.github.io/?https://github.com/gaborluk/privacytools.io/blob/master/index.html

### Description Firefox automatically downloads and installs the Widevine Content Decryption Module provided by Google Inc. (the Widevine CDM for short). ![widevine](https://user-images.githubusercontent.com/6388299/44338955-f0a5ce00-a47f-11e8-8584-c9a92e8b6009.png) There are two (apparently undocumented) **about:config** rules that deal with this plugin: `media.eme.enabled` and `media.gmp-widevinecdm.enabled`. #### The recommended settings * `media.eme.enabled = false` This is equivalent to unchecking the _Play DRM-controlled content_ checkbox in the Options, and it will disable playback of DRM-controlled HTML5 content, which, if enabled, automatically downloads the Widevine CDM. This setting automatically uninstalls the Widevine CDM plugin. Setting `media.eme.enabled` to `true` again automatically reinstalls it. ![drm](https://user-images.githubusercontent.com/6388299/44339375-665e6980-a481-11e8-934d-b0f57484faae.png) * `media.gmp-widevinecdm.enabled = false` This is equivalent to selecting _Never Activate_ from the dropdown menu of the Widevine CDM plugin, and works whether the plugin is currently installed or not. If the plugin has been uninstalled by `media.eme.enabled = false`, and `media.eme.enabled` is set to `true` again, this setting will prevent Firefox from automatically installing and activating the plugin until `media.gmp-widevinecdm.enabled` is also set to `true` explicitly. [More information in Firefox Help](https://support.mozilla.org/en-US/kb/enable-drm) ### HTML Preview http://htmlpreview.github.io/?https://github.com/gaborluk/privacytools.io/blob/master/index.html

👍 1

bakku (Migrated from github.com) reviewed 2018-08-20 12:27:48 +00:00

kewde (Migrated from github.com) approved these changes 2018-08-23 10:27:15 +00:00

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Reference: privacyguides/privacytools.io#509