I know maybe this doesn’t have strong relation with Mac, but I cannot resist to post this the most hilarious hidden feature of Firefox 3: The Robots!
You can try it, open your Firefox 3 (I believe you’ve downloaded it) and then type in the url address about:robots.
Special thanks to all Firefox 3 contributors that I cannot spell their name one by one. But you can see who are they inside about:credits.
And you should remember this: Don’t bite the robots!