Mozilla Labs - Jetpack Prototype is a Thunderbird and Firefox extension that empowers web developers to easily build Firefox/Thunderbird add-ons, using common web technologies.
is an open source add-on designed to work with Mozilla Firefox 3.5 - 3.7 Alpha 5 and Mozilla Thunderbird 3.0 Beta 3 - 3.0.*.
What's New in This Release: [ read full changelog ]
· Fixed a bug to allow Jetpack to work on the latest nightlies of Firefox, renamed the addon to "Jetpack Prototype", and added a banner at the top of about:jetpack informing users that the prototype is no longer under active development, and directing users to the SDK.