title: Detect when a stylesheet is loaded twice
body: <p>I'm trying to debug my site in IE11 but it crashes when opening developer tools by F12.</p>
  
  <p>Apparently this could be because of a CSS loading twice</p>
  
  <p><a href="https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7115490/" rel="nofollow noreferrer">https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/7115490/</a></p>
  
  <p>How can I find which CSS causes the issue? I tried to look at the CSS resources loaded in Chrome in the Network tab, but there's no same css called twice. I am not sure it would even display it twice there.</p>
  
  <p>Is there a tool or technique I can use?</p>