title: html accept in mac ignores .tar.gz extension
body: <p>I need to to have a file selection that only accepts tar.gz. </p>
  
  <p>so I added <code>accept=".tar.gz"</code> and everything seemed to work fine. </p>
  
  <p>Then a teammate of mine complained that it doesn't work for him. and indeed it didn't.. </p>
  
  <p>the only difference is that he runs on mac and I am on ubuntu. we both use chrome. </p>
  
  <p>to resolve this, we added <code>.gz</code> (just .gz) on the accept attribute. </p>
  
  <p>has anyone seen this? is there a solution to this problem? </p>