btw. that User-JS script.
I just thought about it and modified it, because it adds a number at the end of the URL, which causes the browser to not cache any picture, but reload them every time.
That makes no sense, because the URL is rewritten to sys.8kun.top and so it loads it from that URL anyway, but when that number is added the loads the same image over and over from the server instead of caching it, which means more outgoing traffic for 8kun, which is bad.
I removed the code that adds the number and for me it still works fine.