Examine source code of Minimalist Start Page

{
  "manifest_version": 2,
  "name": "Minimalist Start Page",
  "version": "1.1",
  "description": "A customizable, minimalist browser start page designed for a clean and distraction-free experience",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4383258f-0a3f-4fcb-95a7-870fc68f3e0a}"
    }
  }
}