How to write Firefox extension

Looked around for info on how to write firefox extension. Downloaded the source dist as well.

Here are some good info:

http://extensions.roachfiend.com/howto_bug.html
http://www.bengoodger.com/software/mb/extensions/packaging/extensions.html
http://roachfiend.com/
http://roachfiend.com/archives/2005/03/09/enabling-extension-updates/#more-20
http://ted.mielczarek.org/code/mozilla/ffinstall/