Examine source code of Container Sets

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "1.0.0",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "tabs",
    "contextMenus",
    "contextualIdentities",
    "cookies",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "commands": {
    "open-group-1": {
      "suggested_key": {
        "default": "Alt+Shift+J"
      },
      "description": "__MSG_cmdOpenGroup1__"
    },
    "open-group-2": {
      "suggested_key": {
        "default": "Alt+Shift+K"
      },
      "description": "__MSG_cmdOpenGroup2__"
    },
    "open-group-3": {
      "suggested_key": {
        "default": "Alt+Shift+L"
      },
      "description": "__MSG_cmdOpenGroup3__"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "container-sets@timoklerx",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}