Examine source code of gothamExtension

{
  "manifest_version": 2,
  "name": "gothamExtension",
  "author": "Aryan Sharma",
  "version": "1.0.1",
  "description": "Focus on your main tasks with Time and weather widgets",
  "permissions": [
    "storage"
  ],
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{98a50573-2b7d-4e3f-be89-44d58c2fca94}"
    }
  }
}