chrome 插件开发说明

创建 `manifest.json` 文件

manifest.json 文件包含插件的说明性内容，包括

Name		Name	Last commit message	Last commit date
Latest commit History 6 Commits
image		image
images		images
src		src
.DS_Store		.DS_Store
.gitignore		.gitignore
background.js		background.js
entry.json		entry.json
manifest.json		manifest.json
package-lock.json		package-lock.json
package.json		package.json
popup.html		popup.html
readme.md		readme.md
webpack.config.common.js		webpack.config.common.js
webpack.config.prod.js		webpack.config.prod.js