Examine source code of Bookmark Tab Group Manager

{
  "manifest_version": 3,
  "name": "Bookmark Tab Group Manager",
  "version": "1.0.1",
  "description": "Open bookmarks in specific tab groups. Edit bookmarks to assign them to tab groups.",
  "browser_specific_settings": {
    "gecko": {
      "id": "bookmark-tabgroup-manager@addon.local",
      "strict_min_version": "147.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "bookmarks",
    "tabs",
    "tabGroups",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "commands": {
    "edit-bookmark-tabgroup": {
      "suggested_key": {
        "default": "Ctrl+Shift+B",
        "mac": "Command+Shift+B"
      },
      "description": "Edit bookmark tab group"
    }
  }
}