Examine source code of Skeptic Reader

{
  "manifest_version": 2,
  "name": "Skeptic Reader",
  "version": "4.3.2",
  "description": "Your critical trigger on article news",
  "permissions": [
    "activeTab",
    "storage",
    "<all_urls>"
  ],
  "browser_action": {
    "default_title": "Skeptic Reader",
    "default_popup": "main.html",
    "default_icon": {
      "16": "assets/icons/extension-icon-16.png",
      "32": "assets/icons/extension-icon-32.png",
      "48": "assets/icons/extension-icon-48.png",
      "128": "assets/icons/extension-icon-128.png"
    }
  },
  "background": {
    "scripts": [
      "browser-polyfill.min.js",
      "service-worker.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "extract-page-content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "assets/icons/extension-icon-16.png",
    "32": "assets/icons/extension-icon-32.png",
    "48": "assets/icons/extension-icon-48.png",
    "128": "assets/icons/extension-icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{40e329eb-004e-4fcd-a615-dbf7a1349e5d}"
    }
  }
}