Files seem to persist even after quitting chrome, refreshing or closing the tab. I'm not an expert, but assume it's cookie storage.

I think JupyterLite is using localStorage by default. But there are File System APIs for WASM and some external projects[0], I don't think they're yet integrated.

[0] https://github.com/jvilk/BrowserFS

Thanks, yes I see it now. It stores the notebook, which is a json, as a value in the localStorage object, with the filename as a key. Interesting, yes, not quite easy to configure (though I haven't read through the documentation or code to find this).

> I think JupyterLite is using localStorage by default

This has been a problem when using Konqueror.

JupyterLite has a binding between the browser local storage and the WASM File System, so you can create a file from Python and it will be saved in the browser local storage for next time you come