Examine source code of Nexus Startpage

{
  "manifest_version": 2,
  "name": "Meine Startseite",
  "version": "1.5.3",
  "description": "Personalisierte Startseite mit Schnellzugriffen und Lesezeichen",
  "author": "Johannes Kröning",
  "homepage_url": "https://xn--krning-xxa.com/apps.php",
  "icons": {
    "16": "images/favicon-16x16.png",
    "32": "images/favicon-32x32.png",
    "192": "images/android-chrome-192x192.png",
    "512": "images/android-chrome-512x512.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [
    "storage",
    "history",
    "tabs",
    "topSites"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "startpage@xn--krning-xxa.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}