> For the complete documentation index, see [llms.txt](https://doc.bitbrowser.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.bitbrowser.net/question/issues/browser-launch-failed.md).

# Browser launch failed

* Proxy connection failed.
* Local internet error.
* Abnormal fingerprint configuration.