With the release of 0.3RC2 we are preparing to put a tutorial on how easy it is to write a new extension for the Websecurify platform. Although we are going to put a lot of effort in pulling all of our experience in this guide, we hope that you can give us a hand.
If you have experience with either xulrunner or firefox extension development and you think that you can spare a few minutes to dump some of your experience into the extensions writing guide, please do let us know.