On Firefox on Linux, the favicon flickers if changed quickly in this example.<p>The webcam is a hilarious example. Reminds me of this 1-dimensional video game you can play in your address bar. <a href="http:&#x2F;&#x2F;glench.com&#x2F;hash&#x2F;" rel="nofollow">http:&#x2F;&#x2F;glench.com&#x2F;hash&#x2F;</a>