Applies to all browsers, and the Secure Web addon for Pale Moon
It came to my attention that forcing HTTPS connections to quattroplay.com and (possibly) akamai.com will break the game and make everything black on screen. After experimenting, I found the issue and found that disabled the rules would fix it.
If you get this issue, you should click on your addon icon and hit click on the checkmark next to quattroplay and the akamai domain (the checkmark for akamai is usually faded/slightly transparent, and when it looks like that you should definitely disable it) -- then refresh the page.
I hope the developers will fix this soon as everyone should be using HTTPS Everywhere and similar privacy-guarding addons.