Examine source code of Volume Booster

{
  "manifest_version": 3,
  "name": "Volume Booster",
  "version": "1.0",
  "description": "Увеличивает громкость вкладки выше 100%",
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "volume-booster@my-local-addons.local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}