Examine source code of Message Button Chat Basic

{
  "manifest_version": 2,
  "name": "Message Button Chat Basic",
  "version": "1.0",
  "description": "The Message Button Chat utility allows you to text directly and save messages right on the utility in the fastest and simplest way.",
  "permissions": [],
  "browser_action": {
    "default_popup": "game.html",
    "default_icon": {
      "128": "images/tri-logo.png"
    }
  },
  "icons": {
    "128": "images/tri-logo.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{885e4fad-731b-4779-8d26-ea666ab26c93}"
    }
  }
}