title: JavaScript pop-up, can't change URL
body: <p>So I've been experiencing several issues around pop-up windows within a corporate Intranet site, i.e. JavaScript 'window.open' the last one brought to my attention is the inability to change the URL of a pop-up once it's opened. I first tried this on Edge then Firefox to confirm.</p>
  
  <p>After playing with the pop-up window options, I found that if I set 'toolbar=1' then I could change the URL in Firefox but not Edge or IE.</p>
  
  <p>I was using the following code in a w3schools editor</p>
  
  <pre><code>&lt;!DOCTYPE html&gt;
  &lt;html&gt;
  &lt;body&gt;
  
  &lt;p&gt;Click the button to open a new browser window.&lt;/p&gt;
  
  &lt;button onclick="myFunction()"&gt;Try it&lt;/button&gt;
  
  &lt;script&gt;
  function myFunction() {
      window.open('https://www.w3schools.com','123','width=560,height=340,toolbar=1');
  }
  &lt;/script&gt;
  
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>This seems to be a Windows 7 and 10 issue on IE or Edge. Is there a new security setting somewhere that I'm missing?</p>