CORS Correction Center от wowi

Wanted to play the new Blue Archive event mini-game, but got stuck on a black screen? That's thanks to our good old friend, CORS Missing Allow Origin.
Fear not, however: WE'RE CCC! We'll set you back on track in no time!

The gist of it is:
- The mini-game's assets are hosted on a separate server
- Your browser asks the server if the mini-game page is allowed to use those assets
- The server remains silent
- The browser refuses to load the assets, in case you're on a malicious page

To fix this, the extension tells the browser that it's safe to load the assets.
It affects as few things as possible to keep things secure.

Check out its source code: https://github.com/wowizowiii/cors-correction-center