Jetblock is a project mainly written in JavaScript, it's free.
Plugin-blocking extension for Firefox. Built with the Addon SDK (née Jetpack SDK).
Jetblock is an experiment. I try to create a Flasbock-like extension using the new Addon SDK from Mozilla (née Jetpkack SDK).
There is a lot of way to improve performances here. I will try to detail each improvements made starting from now.
Want to contribute? Great! Do not hesitate to fork, patch and send me an email if uyou have questions.