Examine source code of Simple YouTube Downloader

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.3.2",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "simple-yt-downloader@local",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "downloads"
  ],
  "host_permissions": [
    "*://www.youtube.com/*",
    "*://music.youtube.com/*",
    "*://www.youtube-nocookie.com/*",
    "*://*.googlevideo.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self';"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://music.youtube.com/*",
        "*://www.youtube-nocookie.com/*"
      ],
      "all_frames": true,
      "run_at": "document_idle",
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "downloader.html"
      ],
      "matches": [
        "*://www.youtube.com/*",
        "*://music.youtube.com/*",
        "*://www.youtube-nocookie.com/*"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}