This extension leaks memory badly on notebook.google.com. I measured ~1.5 GB of JS heap retained per NotebookLM tab, attributed entirely to this extension's content script realm, even after normal use. With two NotebookLM tabs open it added roughly 3 GB to my browser's memory footprint. Great concept, but needs a memory audit before I can keep using it. Contact me for details: christopher.hoee@gmail.com

It works like a charm: I use it to bulk delete sources, but it can also backup/restore sources among many other things. Thanks!