Examine source code of ithoStartPage

{
  "manifest_version": 2,
  "name": "ithoStartPage",
  "version": "1.0",
  "description": "Minimalist startingPage with weather and time information. You can customize lat&long and userName to your liking.",
  "chrome_settings_overrides": {
    "homepage": "index.html"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "applications": {
    "gecko": {
      "id": "ithorim@proton.me",
      "strict_min_version": "58.0"
    }
  }
}