Lock Encrypted Media Extensions

Supported on: Firefox 77 or later, Firefox 68.9 ESR or later

Registry

HKLM Software\Policies\Mozilla\Firefox\EncryptedMediaExtensions

HKCU Software\Policies\Mozilla\Firefox\EncryptedMediaExtensions

Value name: Locked

Enabled: Locked = 1

Disabled: Locked = 0

Description

If this policy is enabled and EncryptedMediaExtensions are disabled, Firefox will not download encrypted media extensions (like Widevine) or ask the user to install them. If this policy is disabled or not configured, it has no effect.