title: Can't upload files with zip format in Chrome using the accept attribute
body: <p>Dears,</p>
  
  <p>I have Chrome version 60 and I need to know if there's something I'm doing wrong or if there's bug or there's something that I do not understand</p>
  
  <p>Simply we're having a bug that our upload button (input type file) doesn't work sometimes
  So when you click on the upload button it doesn't trigger the upload dialog</p>
  
  <p>So I tried to isolate the problem to see what's going on and to be honest I'm not really sure why it is happening
   <br> <br>
  Steps to reproduce the problem: <br>
   1. Create a new HTML file locally <br>
   2. Add this input type file in it
  <code>
  &lt;input type="file" accept=".csv,.tsv,.tab,.txt,.xlsx,.zip"&gt;
  </code>
   3. Run this file in Chrome
  <br><br><br>
  You should notice that this upload input doesn't work</p>
  
  <p>Also if you tried and removed the zip extension it should work just fine</p>
  
  <p>I'm aware that if I removed the whole accept attribute it should work fine but I want only to accept these files</p>
  
  <p>So why is this happening ?</p>
  
  <p>Thanks a lot for your help.</p>