A brief introduction of what is an extension and How to built one for the Chrome browser that we all love. It includes some example of popular extensions and a little demo of a plugin I built to watch movies from Yify Torrent.
13. Browser UI
Browser Actions Add icons to the toolbar (extensions only)
Desktop
Notifications
Notify users of important events
Omnibox Add a keyword to the address bar
Options Pages Let users customize your extension
Override Pages Implement your own version of standard browser pages such as
the New Tab page
Page Actions Add temporary icons inside the address bar (extensions only)
Themes Change the overall appearance of the browser