The good folks over at Mozilla labs have just launched a project called Jetpack.
Jetpack is a newly formed initiative and experiment in using open Web technologies to enhance the browser, with the goal of allowing anyone who can build a Web site to participate in making the Web a better place to work, communicate and play.
Firefox extensions have, since their inception, been somewhere between Web development and desktop app development in their complexity and skill requirements. This project is going to really push the barriers down for Web developers and I think open up Firefox extension development to tens of thousands of additional contributors.
If you think the 7,000+ Firefox add-ons available now is pretty awesome, just wait 'till Jetpack takes off!
But don't just sit around waiting. Get involved today!
Oh, and digg it.