Examine source code of Instant Text Stats

{
  "manifest_version": 3,
  "name": "Instant Text Stats",
  "version": "1.0.0",
  "description": "Count words, characters, lines, and estimated reading time instantly from the Firefox toolbar.",
  "icons": {
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "action": {
    "default_title": "Instant Text Stats",
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{cc9579e8-ee71-4bcd-a5a3-536991655c3d}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}