title: Open Safari window without toolbar in Safari Extension
body: <p>I am trying to build macOS Safari Extension, with the ability to open a new window without toolbar, like <a href="http://tailwindapp.com" rel="nofollow noreferrer">tailwindapp.com</a> do, in their extension.</p>
  <p>If I use this function:
  <a href="https://developer.apple.com/documentation/safariservices/sfsafariapplication/1639493-openwindow" rel="nofollow noreferrer">https://developer.apple.com/documentation/safariservices/sfsafariapplication/1639493-openwindow</a>
  then toolbar is visible, and I can't find any variable to hide toolbar in this method.</p>
  <p>If I try to open a popup window from js, when it obviously getting blocked. So probably need to open it from the native code</p>