title: How to access a downloaded file from a Chrome extension?
body: <p>I am trying to access a downloaded file from a Chrome extension. When I use the method in <a href="https://stackoverflow.com/a/44947814/4878398">this</a> answer I am able to access to download when I load the unpacked Chrome extension from my file system. However, when I load the same Chrome extension from the Chrome webstore this does not work anymore. I get the following error:</p>
  
  <blockquote>
    <p>Failed to load file://PATHTOFILE: Cross origin requests are only supported for protocol schemes: http, data, chrome, chrome-extension, https.</p>
  </blockquote>
  
  <p>How can I get this to work when I load the Chrome extension from the Chrome webstore?</p>