After navigating to a new page in an iframe, previous page is not destroyed/frozen

[paulrouget]

I believe this happens only with documents in iframes.

index.html:

<iframe src="a.html"></iframe>

a.html:

<script>
  setInterval(() => {
    console.log("a");
  }, 1000);

</script>

<a href="./b.html">b</a>

b.html:

<h1>b</h1>

Running index.html, logs are printed in the console. Then navigating to b.html, a.html is not displayed anymore, but its JS code is still running.

[Ms2ger]

#8426

[paulrouget]

This happens because the pipelines in iframes are never frozen.