Examine source code of NextGen Beck-Online

{
  "description": "Reduziert die Breite von Beck-Online für die bessere Lesbarkeit auf modernen 16:9-Monitoren.",
  "manifest_version": 2,
  "name": "NextGen Beck-Online",
  "version": "1.3",
  "homepage_url": "https://www.philipschopen.de",
  "icons": {
    "48": "icons/iconsvg.svg",
    "96": "icons/iconsvg.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.beck-online.beck.de/*"
      ],
      "js": [
        "ngbo.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{80c0e3ce-dd88-497d-8180-6f00b37a480c}"
    }
  }
}