这篇文章用来学习开发chrome extensions。最终将完成开发table of contents插件,尽可能实现所有的需求。然后是七牛云上传插件。话说这又是一个大坑啊，得慢慢填啊。
http://stackoverflow.com/tags/google-chrome-extension/info stack overflow
https://developer.chrome.com/extensions Google developer
Extensions are small programs that can modify and enhance the functionality of the chrome browser.
By the way, there are so many APIS. it's a nightmare.
it's a metadata file in JSON format that contains properties like your extension's name, description, version number and so on.
EN, there are so many apis.
Have finished TOC extension, there is something to learn. Of course, facing so many api, I brain is heavy. chrome ask 5$ for first publish application. So I give up. 把这个坑先盖起来，以后填。