Examine source code of ClassGrab

{
  "manifest_version": 3,
  "name": "ClassGrab",
  "description": "Allows you to download multiple files from Google Classroom with a single click.",
  "version": "1.0.0",
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "permissions": [
    "activeTab",
    "downloads"
  ],
  "action": {
    "default_popup": "views/popup.html",
    "default_icon": {
      "16": "icons/16.png",
      "32": "icons/32.png",
      "48": "icons/48.png",
      "128": "icons/128.png"
    }
  },
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://classroom.google.com/*"
      ],
      "js": [
        "scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "classgrab@chthoniccream"
    }
  },
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}