Examine source code of Keyword DJ

{
  "manifest_version": 2,
  "name": "Keyword DJ",
  "version": "1.0",
  "description": "Analyzes prominent keywords on a page and maps them to instruments (e.g., fire=guitar, water=flute, wind=drums).",
  "icons": {},
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "keyword-dj.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d3c1a921-e38a-4234-b1b8-9df34455df5d}"
    }
  }
}