Examine source code of SEO Inspector Extension

{
  "manifest_version": 3,
  "name": "SEO Extension | Quick Website Inspector",
  "version": "2.1",
  "description": "Fast and accurate SEO analyses right in your browser. This tool focuses on the essential parameters of on-page and technical SEO without cluttering up your interface.",
  "browser_specific_settings": {
    "gecko": {
      "id": "seo-quick-inspector@manuelstuerkat.de",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "SEO Insights",
    "default_icon": "icon.png"
  },
  "icons": {
    "128": "icon.png"
  }
}