This is old news, it’s working for over 5 years now.
Yes I assumed that WebGL was the culprit :). And I totally agree with you, especially when the content is about surveillance.
I had allowed all scripts for that website, still not working.
“Browser not supported” - weird choice not to support hardened browsers like Librewolf.
If you do a quick web search, you can find 5 years old reddit posts that link to the exact same github of d07RiV that is first mentioned in the article. So I suppose DevilitionX will be around for the same amount of time.