Examine source code of Bento - New Tab Page

{
  "manifest_version": 2,
  "name": "Bento - New Tab Page",
  "description": "displays a new tab page you can fully customize to your needs",
  "version": "1.7",
  "author": "Kai Steinke",
  "homepage_url": "https://gitlab.com/kaisteinke/bento",
  "options_page": "options.html",
  "short_name": "Bento",
  "icons": {
    "16": "icons/logo/16.png",
    "48": "icons/logo/48.png",
    "128": "icons/logo/128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [
    "tabs",
    "storage"
  ]
}