Examine source code of Github Quick Launch

{
  "name": "Github Quick Launch",
  "description": "Launch github links quickly",
  "version": "1.0",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage"
  ],
  "browser_action": {
    "default_title": "Launch github.com links quickly",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "/images/logo.png",
      "32": "/images/logo_32.png",
      "48": "/images/logo_48.png",
      "64": "/images/logo_64.png",
      "128": "/images/logo_128.png"
    }
  },
  "options_ui": {
    "chrome_style": false,
    "page": "options.html"
  },
  "icons": {
    "16": "/images/logo.png",
    "32": "/images/logo_32.png",
    "48": "/images/logo_48.png",
    "64": "/images/logo_64.png",
    "128": "/images/logo_128.png"
  }
}