Examine source code of google.de_dark

{
  "manifest_version": 2,
  "name": "google_dark",
  "version": "0.7.2resigned1",
  "description": "Dark theme for google.",
  "icons": {
    "48": "icons/google-48.png",
    "96": "icons/google-96.png"
  },
  "options_ui": {
    "page": "options/options.html"
  },
  "permissions": [
    "storage"
  ],
  "applications": {
    "gecko": {
      "id": "{eb67eb49-2afa-405c-ab17-f357723048d8}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.google.de/*",
        "*://*.google.com/*"
      ],
      "js": [
        "google_dark.js"
      ]
    }
  ]
}