For me, it fails in both Chrome Canary (26.0.1378.2) and Firefox says I do not have a compatible graphics card. (Possibly just hates my Optimus setup) And, of course, IE9 lacks webGl in the first place, so it doesn't even get to the point of causing a process hang like Canary did. All Windows 7.

Once I did find a browser that worked with the site, though- that's the best explanation of both fractals and complex numbers I've ever seen!

I had to start chrome with primus [0] to get the visualisations working for me. I'm running Debian Testing.

    primusrun google-chrome --ignore-gpu-blacklist

[0] https://github.com/amonakov/primus

Works fine in Chromium 23.0.1271.97 on my Arch machine.