Examine source code of Close Duplicate Tabs

{
  "manifest_version": 3,
  "name": "Close Duplicate Tabs",
  "version": "1.0.0",
  "description": "Find and close duplicate tabs in your browser with one click. Keep your browser clean and organized.",
  "permissions": [
    "tabs"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon-16.svg",
      "32": "icons/icon-32.svg",
      "48": "icons/icon-48.svg",
      "96": "icons/icon-96.svg",
      "128": "icons/icon-128.svg"
    },
    "default_title": "Close Duplicate Tabs"
  },
  "icons": {
    "16": "icons/icon-16.svg",
    "32": "icons/icon-32.svg",
    "48": "icons/icon-48.svg",
    "96": "icons/icon-96.svg",
    "128": "icons/icon-128.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a1b2c3d4-1111-2222-3333-444455556666}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}