title: Prevent site inside <iframe> from responding / acting responsively
body: <p>I am displaying some sites in <code>&lt;iframes&gt;</code> in my site and those sites, which I don't have control over the source of, are responding / acting responsively inside the <code>&lt;iframe&gt;</code>.</p>
  
  <p>Is there a way I can prevent this?</p>
  
  <p>By acting responsively, I mean they are sized at their largest breakpoint bigger than what the <code>&lt;iframe&gt;</code> is and they don't fit within the <code>&lt;iframe&gt;</code>.</p>