Examine source code of Basic New Tab

{
  "manifest_version": 2,
  "name": "Basic New Tab",
  "version": "1.0",
  "description": "A dark new tab page with a search bar.",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "chrome_settings_overrides": {
    "homepage": "index.html"
  },
  "permissions": [
    "search"
  ],
  "options_ui": {
    "page": "about.html",
    "browser_style": true
  }
}