This one is also an interesting test because it has ways around many obfuscation attempts that privacy oriented browsers utilize. Well... less of a test and more of a showcase how creepy js is.
On my setup it was able to get way more info compared to coveryourtracks. For example, creepjs always detects my actual display size, but coveryourtracks doesn't.
https://abrahamjuliot.github.io/creepjs/
Not even chameleon seems to be able to hide all your stuff from creepjs.
So the best privacy you can get is to disable js completely.