The server appears to be timing out but the title and concept reminds me of this: https://panopticlick.eff.org/
I pass the first three tests here, but fingerprinting does the trick. About one in 50k browsers has the same fonts as me. About one in 30k browsers have the same addons and plugins. I bet those two don't overlap. Then there are several other variables like language that narrow it down if that is still needed.
They could try to explain how to make a browser not uniquely identifiable however. What browser configuration is not unique? What do I have to do to get that?
> Browserprint is a free open source project designed to provide the same and better functionality as the original Panopticlick.
(Though I'm not sure exactly what they've done to make it better..but the hat tip is there at least!)