Widevine is a digital rights management (DRM) technology developed by Google. It allows web browsers to play protected content from streaming services like Netflix, Hulu, Disney+, Amazon Prime Video, and Spotify (for video podcasts). Firefox uses Widevine to decrypt and play this DRM-locked media seamlessly.
: Firefox includes Widevine by default. You don't have to manually download external plugins like the old Silverlight or Flash days. firefox widevine