Examine source code of New Tab Redesign

{
  "manifest_version": 2,
  "name": "New Tab Redesign",
  "version": "1.0",
  "description": "Get a beautiful image daily and manage ToDo list",
  "icons": {
    "48": "icons/icon-48.ico"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "newtabtodo.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "vksoni64@gmail.com"
    }
  }
}