title: How can I remove the moz-extension:// in the popup window Firefox extension created?
body: <p>Currently, I'm developing an Firefox extension app. It will open a html file in a new popup window. When the poup window opened, it shows the title as format: "moz-extensions://", does anyone know how can I remove the prefix, the "moz-extension://"?</p>
  
  <p>Thank you very much!</p>