Examine source code of DDG Position

{
  "manifest_version": 2,
  "name": "DDG Position",
  "version": "1.0",
  "description": "Places a marker with position of a Google result link in DDG results. ",
  "content_scripts": [
    {
      "matches": [
        "*://*.google.com/search?*"
      ],
      "js": [
        "ddgposition.js"
      ]
    }
  ],
  "permissions": [
    "*://html.duckduckgo.com/html/*"
  ]
}