Examine source code of Metropolitan Mind-Match

{
  "manifest_version": 3,
  "name": "Metropolitan Mind-Match",
  "version": "1.0",
  "description": "Challenge yourself with an interactive capital city quiz! Sharpen your global geography skills with various difficulty levels right from your browser toolbar.",
  "icons": {
    "48": "metropolitan-icon.png"
  },
  "action": {
    "default_popup": "index.html",
    "default_title": "Metropolitan Mind-Match"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{7892badd-8547-44eb-9a90-01848d95cc50}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}