Examine source code of GDork

{
  "manifest_version": 2,
  "name": "GDork",
  "version": "0.1",
  "author": "SI9INT",
  "description": "Allows quick access to results of a google-dork",
  "icons": {
    "64": "icons/gd-64.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "include_globs": [
        "*://*.google.*/*"
      ],
      "js": [
        "gdork.js"
      ]
    }
  ],
  "browser_action": {
    "browser_style": true,
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/gd-16.png",
      "32": "icons/gd-32.png"
    }
  }
}