Examine source code of Configurable Containers

{
  "manifest_version": 2,
  "name": "configurable-containers",
  "version": "2609.0.121",
  "browser_specific_settings": {
    "gecko": {
      "id": "configurable-containers@k5d.de",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "webNavigation",
    "cookies",
    "storage",
    "tabs",
    "contextualIdentities",
    "notifications",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_title": "Configurable Containers — pause routing in this container"
  },
  "commands": {
    "reopen-picker": {
      "suggested_key": {
        "default": "Ctrl+Shift+O"
      },
      "description": "Reopen this tab in a container"
    }
  }
}