foxgirl-linux/docs/DRM.md

DRM Compatibility

Digital rights management (DRM) is enforced off by default (this is needed for Netflix and similar); you can enable it with the following instructions:

• Open librewolf.cfg
• Under the section Section: User Settings
• Comment the active lines with // under the subsection User Settings: DRM/CDM - Main
• Comment the active lines with // under the subsection User Settings: DRM/CDM - Widevine
• Restart Firefox then open about:preferences and enable Play DRM... under general section
• Firefox will download Widevine and enable it (under about:addons plugins section) you can force the download by clicking Check for updates under the tools button