Examine source code of Tabrise - Custom new tab

{
  "manifest_version": 3,
  "name": "Tabrise",
  "short_name": "Tabrise",
  "description": "A focused, customizable new tab page with widgets, shortcuts, calendar, weather, notes, and focus tools.",
  "version": "1.1.1",
  "homepage_url": "https://keepsurfing.fr/tabrise/",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [
    "storage",
    "bookmarks",
    "geolocation",
    "search"
  ],
  "host_permissions": [
    "https://www.google.com/*",
    "https://duckduckgo.com/*",
    "https://api.open-meteo.com/*",
    "https://geocoding-api.open-meteo.com/*",
    "https://api.nasa.gov/*",
    "https://picsum.photos/*",
    "https://content.guardianapis.com/*",
    "https://www.reddit.com/*",
    "https://hn.algolia.com/*",
    "https://dev.to/*",
    "https://api.rss2json.com/*",
    "https://feeds.bbci.co.uk/*",
    "https://techcrunch.com/*",
    "https://www.theverge.com/*",
    "https://www.wired.com/*",
    "https://news.google.com/*",
    "https://query1.finance.yahoo.com/*",
    "https://api.coingecko.com/*",
    "https://stooq.com/*",
    "https://finnhub.io/*",
    "https://www.thesportsdb.com/*",
    "https://site.api.espn.com/*",
    "https://api64.ipify.org/*"
  ],
  "optional_host_permissions": [
    "https://*/*"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "modern-newtab@keepsurfing",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "searchTerms",
          "locationInfo",
          "websiteContent"
        ]
      }
    }
  }
}