Examine source code of New Tab Google Home

{
  "browser_action": {
    "browser_style": true
  },
  "description": "Go to Google home when new tab is opened.",
  "manifest_version": 2,
  "name": "New Tab Google Home",
  "permissions": [
    "tabs"
  ],
  "background": {
    "scripts": [
      "google-tab-url.js"
    ]
  },
  "version": "1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{dd629d10-ae72-47f7-a845-66c49b0ef57e}"
    }
  }
}