Examine source code of Widgetopia

{
  "manifest_version": 3,
  "name": "Widgetopia",
  "version": "2.0.0",
  "description": "Customize your new tab page with widgets",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
    },
    "default_title": "Widgetopia"
  },
  "permissions": [
    "storage",
    "history",
    "bookmarks",
    "identity"
  ],
  "host_permissions": [
    "https://www.googleapis.com/*",
    "https://accounts.google.com/*",
    "https://oauth2.googleapis.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "widgetopia@example.com",
      "strict_min_version": "109.0"
    }
  }
}