Examine source code of Yt tools

{
  "name": "Yt tools",
  "version": "1.3",
  "description": "YouTube enhancements.",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{9fafdbef-02d8-49db-a5b9-780f1f5b8b53}"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://youtube.com/*",
    "https://www.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://youtube.com/*",
        "https://www.youtube.com/*"
      ],
      "js": [
        "undo.js",
        "seeking.js",
        "script.js"
      ],
      "all_frames": true
    }
  ],
  "action": {
    "default_title": "Yt tools"
  },
  "options_page": "options.html"
}