Examine source code of Karrinator

{
  "manifest_version": 2,
  "name": "Karrinator",
  "version": "1.0",
  "description": "Gibt AKK bessere Namen.",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content-script.js"
      ],
      "run_at": "document_end"
    }
  ]
}