Tutorial about google chrome extensions?

Question

Browser extensions

Hello.
Advise what to read about creating extensions to chrome.
From what I've googled so far - articles on Habré like "put this html and this js, add a manifest, rejoice." No, I blinded, of course, something.
But I would like to find a more systematic description.
For at the moment it is not even clear what is available from the extension, where to get the API description, and what the architecture looks like (what the extension can interact with, in what order, what kind of terrible words "background").