As I know the Add-on SDK quite well, I decided to teach the basics of it to my local Mozilla community. Of course, the presentation does not contain everything I said, so don’t expect to understand everything.
I do have some notes in my .ODP file, which you can download directly from here. No guarantee on the notes actually helping you, but they contain some additional points.
As a bonus a pretty picture of me, talking:
— Colin (@ColinFrei) October 8, 2014