Examine source code of Dinosaur Game Fore

{
  "manifest_version": 2,
  "name": "Dinosaur Game For Firefox",
  "description": "Play the Chrome Dino game on firefox",
  "version": "2.0",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "indox.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{71f3ae59-312d-4700-b4f4-72eb82f60818}"
    }
  }
}