title: Unexpected blocked page when called from link in iframe to PDF file with chrome based browsers
body: <p>I have a webpage in an <code>iframe</code> which contains a link to a foreign page with attributes <code>target=&quot;_blank&quot; rel=&quot;noopener&quot;</code>. This link works well from the page itself and also from the <code>iframe</code> but <strong>only</strong> when called via context menu with the option <code>open in new tab</code>. A regular click opens a new tab and shows the correct <code>URL</code> but results in <code>This page has been blocked by Opera ERR_BLOCKED_BY_CLIENT</code>.</p>
  <p>I looked around for help, disabled all addons to no avail and played the scenario in incognito mode as well, no change. The console on the error page shows <code>VM589:1460 crbug/1173575, non-JS module files deprecated.</code> This hint left me in the dark, however. I manipulated the attributes to <code>target=&quot;_blank&quot; rel=&quot;noopener&quot; rel=&quot;noreferrer&quot;</code> or <code>rel=&quot;noopener noreferrer&quot;</code> with no success. This all applies to <code>Opera</code>.</p>
  <p>I tried <code>Brave</code> with the same result and error message, except <code>Brave</code> instead of <code>Opera</code>, of course. <code>Edge</code> joins the failure band. No surprise then to see <code>This page has been blocked by Chrome</code> proper as well.</p>
  <p>This error applies to all <code>PDF</code>-file links from the <code>iframe</code>, normal external links work well. <code>Firefox</code> shows briefly <code>PDF.js viewer</code> in the new tab and then works normal. I had no chance to try links to <code>YouTube</code> or the like, but I guess there is ample evidence I hit a bug in the <code>chrome</code> <code>PDF</code>-rendering engine.</p>
  <p>What to do? Who is interested in this bug and how to reach them? Or is there anything I can do in my code?</p>