Rated 1 out of 5 stars

The idea of it may be good but the implementation needs serious work. Even running their UnAD demo causes pages to freeze and popup a message saying the script is unresponsive. Sorry, if it doesn't work, it doesn't work. I won't grade based on hype.

This review is for a previous version of the add-on (0.1.4). 

May be "Extension 2.0" Rated 5 out of 5 stars

To me, Jetpack is a sucessful early approach to an "Extension 2.0" framework: easier technique and much faster development.

This review is for a previous version of the add-on (0.1.2). 

Rated 5 out of 5 stars

Very good, but API documentation if lacking quite a few undocumented features.

This review is for a previous version of the add-on (0.1.2). 

Rated 5 out of 5 stars

Looks VERY promising. Will be following its development.

This review is for a previous version of the add-on (0.1.2). 

Rated 5 out of 5 stars

this is going to be awesome :)

This review is for a previous version of the add-on (0.1.2). 

Rated 5 out of 5 stars

This article describes what the goal of Jetpack is: http://ajaxian.com/archives/jetpack-extensions

I think it's a great idea, and the Firefox extension framework has so much untapped potential.

This review is for a previous version of the add-on (0.1.2). 

Rated 5 out of 5 stars

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This review is for a previous version of the add-on (0.1.2).