Firefox version 3 was released about a week ago. While I was browsing with Firefox 3 I came to find out few cool things as well. In fact the guys at Mozilla has really a sense of humor than last time. B-)
The changed places I noticed were about: config and addition of about: robots
In about: config there is a kidding warning message as follows.
There is an about: robots Easter egg as well.As usually they have included a new phrase from Book of Mozilla at about:mozilla
Try these with your copy of Firefox as well.
More bout about URI scheme can be found at http://en.wikipedia.org/wiki/About:_URI_scheme