Firefox 108.0.1 (64-bit) - “The WidevineCdm plugin has crashed”

While studying for my CKAD on Udemy over the holidays I encountered this error when attempting to open ANYTHING that had DRM protected video; Udemy, Netflix, Hulu, etc. Some recommended fixes included maintaining a separate firefox binary. Luckily I found the fix on AskUbuntu.com

Edited /etc/apparmor.d/usr.bin.firefox :

1. Below the line:

   • # per-user firefox configuration

2. Insert the line:

   • owner @{HOME}/.{firefox,mozilla}/**/gmp-widevinecdm/**/libwidevinecdm.so m,

3. After that, you can reboot your computer (or reload AppArmor’s rules with:

   • apparmor_parser --replace /etc/apparmor.d/usr.bin.firefox