Examine source code of Page Info

{
  "manifest_version": 3,
  "name": "Page Info",
  "version": "1.0.0",
  "description": "Shows the current page title and URL and lets you copy the URL.",
  "permissions": [
    "tabs"
  ],
  "action": {
    "default_title": "Page Info",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "page-info@example.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}