title: Downloading multiple files in a queue with a browser
body: <p>I need to download multiple files from a server, and I'm not allowed to download them in parallel so I need to queue them up. I don't have access to the download server so I can only work with the browser. </p>
  
  <p>Is there any sort of API for detecting when a download finishes? I tired looking around but couldn't find anything. Only supporting chrome would be fine, but also supporting Firefox is preferred obviously. </p>