Examine source code of mywebook clipping tool

{
  "version": "1.0.38",
  "name": "mywebook clipping tool",
  "short_name": "mywebook",
  "description": "Use mywebook clipping tool to save articles, videos, images, products and more to your account for later reading and easy access.",
  "manifest_version": 2,
  "minimum_chrome_version": "5.0",
  "icons": {
    "16": "data/icon/icon-16.png",
    "128": "data/icon/icon-128.png"
  },
  "default_locale": "en",
  "background": {
    "page": "data/background/background.html"
  },
  "browser_action": {
    "default_icon": {
      "16": "data/icon/icon-16.png",
      "48": "data/icon/icon-48.png",
      "128": "data/icon/icon-128.png"
    },
    "default_title": "Mywebook",
    "default_popup": "data/popup/popup.html"
  },
  "permissions": [
    "tabs",
    "storage",
    "https://www.mywebook.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.mywebook.com/*"
      ],
      "js": [
        "data/content/content.js"
      ],
      "run_at": "document_end"
    }
  ]
}