Never heard this mentioned anywhere. But here it is. Enjoy. And thank the author. http://docs.mandragor.org/files/Misc/Mozilla_applications_en/

I would agree that this is a much more approachable and coherent book than the O'Reilly offering. The author does a good job of putting things in context by giving a good overview of Moz's technologies and then filling in the details. While I would recommend the book, it does suffer from inadequate proofing (typos are rife) and the author is decidedly opinionated and sometimes not quite perfectly accurate when referring to aspects of related technologies, such as CSS.