Examine source code of Inspirational New Tab

{
  "manifest_version": 2,
  "name": "Inspirational New Tab",
  "version": "1.0",
  "description": "Start your browsing with a motivational quote on each new tab.",
  "permissions": [
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "newtab.html"
  },
  "icons": {
    "48": "icons/motivation-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c76593a-090b-4934-9abf-2faa7d0050f7}"
    }
  }
}