@edwaleni,
This is because at this time, Webtorrent downloads directly to memory, rather than the disk, so that lingering data is cleared when the browser is closed. If you’re using a machine w/2GB ram, this would also explain why the OS comes to a halt (because all that memory is being used to hold the download). You can, however, click the Save file icon for any torrent and it will save the file contents to disk:
