i want to develop an add-on for mozilla

Question

i want to develop an add-on for mozilla which will browse and give every detail of the song that you're playing on your system now !!.. is it possible?.. how to know which song i am playin ? . which ebooks to follow to develop an extension

Answer 1

This question has a good extension scaffold generator.

Mozilla also provides "Let's build a Firefox extension."

Answer 2

Have a look at Jetpack, the new, easy way to create Firefox add-ons.