Firefox Widevine Installation on Windows What is Widevine and why do I need it? Google Widevine is a free plug-in for Digital Rights Management (DRM) and video optimization. Our content is delivered to you using Widevine which helps prevent illegal usage and piracy. Widevine is a DRM solution by Google that allows the delivery of secure and encrypted digital video content. It is widely used by streaming content providers to enable the distribution of encrypted videos on desktop and mobile operating systems.
One of my Windows 10 computers that's running Firefox 57.0.4 has recently enabled a 'Widevine Content Decryption Module' plugin from Google. I did not install this and I cannot find a way to uninstall or delete it, but I did 'disable' it. I have three questions:
1. How can Firefox (without my knowledge or consent) download, install, and enable this, or any other plugin?
2. How can I permanently delete this plugin from my computer?
Widevine Firefox Arm64

3. How can I prevent Firefox from downloading, installing, and enabling other plugins or extensions without my knowledge and consent?

Widevine Firefox Plugin
Thank you for your help.