Examine source code of Quick Onpage SEO Check

{
  "manifest_version": 3,
  "name": "Quick Onpage SEO Checkup",
  "version": "1.0.2",
  "description": "Audit the currently opened page for keyword coverage, headings, schema, word count, and an SEO score.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "downloads"
  ],
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "Quick Onpage SEO Checkup",
    "default_icon": {
      "16": "icon-16.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "@quick-onpage-seo-checkup-areesh-i",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "109.0"
    }
  }
}