Firefox has a silly Easter egg, which
can be viewed by entering "about
kitchensink" in the location bar (note
that there’s no colon). A kitchen sink
made up of ASCII characters will open
up with water flowing down it. You need
to be connected to the Internet for this.
You can also get the same result in other
browsers by entering the keywords about
kitchensink in Google and selecting I’m
Feeling Lucky.