Examine source code of Internet Status Checker

{
  "manifest_version": 2,
  "name": "Internet Status Checker",
  "version": "1.0",
  "description": "utility with the function of checking the user's Internet connection status. When the user clicks on the utility icon, it will display the current connection status (connected or disconnected).",
  "permissions": [],
  "browser_action": {
    "default_popup": "game.html",
    "default_icon": {
      "128": "images/net-logo.png"
    }
  },
  "icons": {
    "128": "images/net-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b59cf884-2f64-4e77-a5ec-46dbe4cf37c1}"
    }
  }
}