> ## Documentation Index
> Fetch the complete documentation index at: https://notte-experiment-visibility-md-links.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# viewer_cdp

> Open a browser tab with the debug URL for visualizing the session

This method opens the default web browser to display the session's debug interface.

## Returns

`None`

## Raises

* `ValueError`: If the session hasn't been started yet (no session\_id available).