Examine source code of YouTube Rate

{
  "manifest_version": 3,
  "name": "YouTube Rate",
  "version": "1.2.3",
  "description": "Give a rating to the videos which will appear on playlists, recommended, history, etc.",
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "about.html",
    "default_title": "About YouTube Rate Extension"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "popup.js",
        "import.html",
        "import.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://m.youtube.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "youtuberate@progme.wrong",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {}
  }
}