Extension and event is just buzzing like a hot model now days everywhere and everybody talking about. Lot of contents has been written with Mix reactions.
At the moment I am not going in all these as I just started doing extensions and thriving to learn extension.
To learn extension and event you can look at the attached file which will give you more insight about developing extensions and event.
I will share my experience with extension in upcoming blog post.
Ammolh Saallvi Blog 