Examine source code of Another New Tab

{
  "manifest_version": 2,
  "name": "Another New Tab",
  "version": "1.1.0",
  "chrome_url_overrides": {
    "newtab": "./index.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ant@silentnoodlemaster.fi"
    }
  },
  "permissions": [
    "storage"
  ]
}