Examine source code of Spooky Times

{
  "manifest_version": 2,
  "name": "unprecedented To spooky",
  "version": "3771.1",
  "description": "Replaces the text 'unprecedented' with 'spooky', we truely live in frightening times.",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content_script.js"
      ],
      "run_at": "document_end"
    }
  ]
}