Examine source code of Password Generator Fast

{
  "manifest_version": 2,
  "name": "Build a Password Generator Fast",
  "version": "1.0",
  "description": "Build a Password Generator is a utility that allows you to create a password that can customize the difficulty level of the password",
  "permissions": [],
  "browser_action": {
    "default_popup": "game.html",
    "default_icon": {
      "128": "images/pass-logo.png"
    }
  },
  "icons": {
    "128": "images/pass-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4bafca42-43e4-447c-8a7d-3a740a8f51fe}"
    }
  }
}