Examine source code of xkcd_doodler

{
  "manifest_version": 2,
  "name": "xkcd_doodle",
  "version": "1.1resigned1",
  "content_scripts": [
    {
      "matches": [
        "https://www.google.cl/*"
      ],
      "js": [
        "page_eater.js"
      ],
      "css": [
        "page_eater.css"
      ]
    }
  ],
  "permissions": [
    "https://xkcd.com/*",
    "storage"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0cba6830-530c-469d-b458-5365d8804cf6}"
    }
  }
}