Examine source code of Open Folder in Tab Group

{
  "manifest_version": 2,
  "name": "Open Folder in Tab Group",
  "version": "1.0.1",
  "description": "Right-click a bookmark folder and open all bookmarks inside one tab group.",
  "permissions": [
    "bookmarks",
    "tabs",
    "menus"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "open-folder-in-tab-group@example.com",
      "strict_min_version": "138.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}