Examine source code of Captcha Warning

{
  "manifest_version": 3,
  "name": "Captcha Warning",
  "version": "1.0",
  "description": "Warns you when a website is using captcha in the background",
  "icons": {
    "48": "public/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0194e1d8-9653-7237-9f4a-47a72f762ae5}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "dist/content.js"
      ],
      "run_at": "document_end",
      "all_frames": true,
      "world": "MAIN"
    }
  ],
  "permissions": [
    "activeTab"
  ]
}