Examine source code of Google Classroom Utils

{
  "manifest_version": 3,
  "name": "Google Classroom Utils",
  "version": "0.0.1",
  "description": "Utilities for Google Classroom",
  "key": "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArbp+GtV0RVrYVF76NfF8Do1cXg/tMX8hQdLQACuPefbcx+Gu42+t1YJcjqEpjj65/U7xfzW2ER9T/15SmpvnNbsKIdiCMU4wY8j1osE1RIoPJuikbrcnNpLHIpRQrAKVGsjHKwNWKM9AYcRZWDJrYrGBk/5g1Hb6PFQkoF98hlZWTueckxnGdjAr5wjcEqxHE6QCM08bXZH+yicIG7CIiRr91DyUJYa3XHcx1syFi2C4eikEFcXb0DHidZqZO90bk0kLn7v0MV2wiFVIArfqdOKw6/VhVJrlPykCanMteVgh0Ga5Rl8rrqxQnFc+jn6N5kDBAs4PYF4/dt51/Cup6QIDAQABmiilcfchjnhncbddoelbhpeaofcndphe",
  "permissions": [
    "downloads",
    "nativeMessaging",
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://classroom.google.com/*"
      ],
      "css": [
        "style.css"
      ],
      "js": [
        "browser-polyfill.min.js",
        "util.js",
        "content-actions.js",
        "inject-links.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "util.js",
      "move-download.js",
      "background-actions.js"
    ],
    "service_worker": "background-actions.js"
  },
  "action": {
    "default_title": "Configure Classroom Download Path",
    "default_popup": "popup.html"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "path-chooser.html"
      ],
      "matches": [
        "*://classroom.google.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "google-classroom-utils@quadratech188"
    }
  }
}