Examine source code of Starry Night New Tab

{
  "manifest_version": 2,
  "name": "Starry Night New Tab",
  "version": "1.0",
  "description": "Replaces the new tab page with a serene night sky filled with twinkling stars and shooting stars.",
  "icons": {
    "48": "icon.png"
  },
  "chrome_url_overrides": {
    "newtab": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{005f19e5-2a3d-4232-bb82-824896736d15}"
    }
  }
}