: Ensure Play DRM-controlled content is checked.
Mozilla’s most significant contribution to the security of DRM implementation is its sandboxing approach. The Widevine CDM is closed-source; theoretically, it could contain vulnerabilities or malicious code. To protect the host system and the user, Firefox wraps the CDM in a strict sandbox. widevine firefox
On desktop versions of Firefox, this module is integrated by default. It runs within a "sandbox," meaning it is isolated from the rest of your system to protect your privacy and security. How to Enable Widevine in Firefox : Ensure Play DRM-controlled content is checked
Users often encounter problems with Widevine in Firefox: widevine firefox