Programmers and artists have at least one thing in common – their habit of including hidden information and gifts, in their creation. Most of the times artists as well as programmers spend hundreds of hours of labor and intellect creating products which wont even carry their names. So in a manner, including hidden code and features can be seen as the programmers’ way of leaving their signatures behind as well as providing benefits to users who discover them. These hidden code and features inside computer programs are called Easter Eggs, because of the similarity between this activity and the traditional Easter Egg Hunting custom in the Europe and the US.

Starting from Atari video games to the latest Windows XP, most of the major software come with some sort of Easter egg embedded inside. It is all in good fun but at times hidden features can grant the user far more power than is imaginable. .

If used correctly the About URI schema can also be used to view important information.

All instances of URLs described above display information only and do not allow the user to edit or change any information. But the special URL about:config opens up for you a storehouse of crucial information that you can not only view but change also. As Firefox warns you ,so must I: this is an advanced tweak and you are discouraged to try it unless you really understand what you are doing.