Hi, it could be your security software that is blocking it or do you have custom Host file on a Mac ?

I have nothing I can find that relates to the new Quantum Code. All things that fixed this before are of no use.

So can you check your not blocking a IP Address that Wildvine maybe attempting to contact in your Firewall.

What is a custom host file? How do I check If I'm blocking the IP address. I dont have any active security software installed.

Everyone should have Security Software Installed. Anyways try this please and see if it works in Safe Mode https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode

It did not

Try to toggle DRM off/on to see if that makes Firefox (re)load DRM components.

• Options/Preferences -> General: Play DRM
• https://support.mozilla.org/en-US/kb/enable-drm

I tried it and nothing happened.

In case you need it, this thread has manual installation steps: How to manually install Widevine plugin in Firefox 58.0.2 on Windows 10 x64?