Examine source code of Material You NewTab Theme

{
  "manifest_version": 2,
  "name": "Material You NewTab",
  "version": "3.1",
  "description": "Redesign your New Tab with a simple, elegant interface inspired by Google's Material You.",
  "permissions": [
    "bookmarks"
  ],
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "icons": {
    "16": "favicon/icon16.png",
    "48": "favicon/icon48.png",
    "128": "favicon/icon128.png"
  },
  "browser_action": {
    "default_icon": "favicon/icon48.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "incognito": "spanning",
  "browser_specific_settings": {
    "gecko": {
      "id": "imtiyaz.india@proton.me"
    }
  }
}