A repo to learn and play with Chrome Extensions.
"Extensions are small software programs that customize the [Chrome] browsing experience. They enable users to tailor Chrome functionality and behavior to individual needs or preferences. They are built on web technologies such as HTML, JavaScript, and CSS."
Google provides a tutorial to build an extension that allows the user to change the background color of any developer.chrome.com page. You'll gain an introduction to the relationships of many of the core components.