Examine source code of PolePosition

{
  "manifest_version": 3,
  "name": "PolePosition",
  "author": "Sumit Bhasagi",
  "version": "1.0.2",
  "description": "PolePosition is a super cool extension that greets you with a message according to the time of the day and shows different backgrounds on page refresh. With PolePosition you can set your main/focus task of the day and also create your own to-do.",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{aa5e5953-a4db-4ed9-a9d0-14569bed3ec5}"
    }
  }
}