Examine source code of Tab Group Manager

{
  "manifest_version": 3,
  "name": "Tab Group Manager",
  "version": "1.1.0",
  "description": "Group tabs by domain, and manage, rename, collapse, sort, and bulk-delete Firefox tab groups.",
  "permissions": [
    "tabGroups",
    "tabs"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_title": "Tab Group Manager",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "tab-group-manager@local",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}