Examine source code of WEB.DE WEB.Cent Alarm

{
  "version": "3.3.0",
  "name": "WEB.DE WEB.Cent Alarm",
  "short_name": "WEB.DE WEB.Cent Alarm",
  "description": "Dank des WEB.Cent Alarm verpassen Sie keine Möglichkeit mehr WEB.Cent Cashback zu sammeln und sparen so im Internet bares Geld!",
  "author": "1&1 Mail & Media GmbH",
  "manifest_version": 3,
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "css": [
        "assets/styles/fonts.css"
      ],
      "js": [
        "content.js",
        "popup.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "*://*.google.de/search?*",
        "*://*.google.com/search?*",
        "*://suche.gmx.net/web**?*",
        "*://suche.web.de/web**?*"
      ],
      "css": [
        "assets/styles/modify.css"
      ],
      "js": [
        "modify.js"
      ]
    }
  ],
  "permissions": [
    "tabs",
    "alarms",
    "storage",
    "cookies",
    "identity",
    "notifications",
    "webRequest",
    "activeTab"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "incognito": "not_allowed",
  "web_accessible_resources": [
    {
      "resources": [
        "assets/**/*"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self';"
  },
  "icons": {
    "48": "assets/icons/status/active.svg",
    "96": "assets/icons/status/active.svg"
  },
  "action": {
    "browser_style": false,
    "default_icon": "assets/icons/status/active.svg",
    "default_area": "navbar"
  },
  "options_ui": {
    "page": "options.html"
  },
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "webcent-amo@web.de",
      "strict_min_version": "112.0"
    }
  }
}