Examine source code of Shuffle the Schau

{
  "manifest_version": 2,
  "name": "Shuffle the Schau",
  "version": "1.1",
  "description": "Vertauscht Überschriften auf tagesschau.de",
  "content_scripts": [
    {
      "matches": [
        "*://*.tagesschau.de/*"
      ],
      "js": [
        "shuffle.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tagesshuffle@nonni"
    }
  }
}