Examine source code of FastMind

{
  "name": "__MSG_appName__",
  "version": "1.0.0",
  "manifest_version": 2,
  "description": "__MSG_appDescription__",
  "icons": {
    "16": "images/icon-16.png",
    "128": "images/icon-128.png"
  },
  "default_locale": "en",
  "permissions": [
    "storage",
    "unlimitedStorage",
    "topSites",
    "https://www.googleapis.com/"
  ],
  "content_security_policy": "script-src 'self' https://www.gstatic.com/ https://*.firebaseio.com https://www.googleapis.com; object-src 'self'",
  "browser_action": {
    "default_icon": {
      "16": "images/icon-16.png"
    }
  },
  "background": {
    "scripts": [
      "scripts/background.js",
      "scripts/ExtPay.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e47d53d0-30a3-4eb5-822b-add04dd83951}"
    }
  }
}