Examine source code of Heading Hierarchy SEO Map

{
  "manifest_version": 2,
  "name": "Heading Hierarchy SEO Map",
  "version": "1.0",
  "description": "Heading Hierarchy SEO Map tool for efficient performance.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Heading Hierarchy SEO Map",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ttnvtn920233@hotmail.com",
      "strict_min_version": "91.1.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  }
}