file_bug1364364-1.html

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<!DOCTYPE html>

<html lang="en">

  <head>

    <meta charset="utf-8">

    <title>title</title>

  </head>

  <body onload="loadFramesAndNavigate();">

    <p id="content"></p>

    <div id="frameContainer">

    </div>

    <script type="application/javascript">

    function waitForLoad(frame) {

      return new Promise(r => frame.onload = () => setTimeout(r, 0));

    async function loadFramesAndNavigate() {

      let dynamicFrame = document.createElement("iframe");

      dynamicFrame.src = "data:text/html,iframe1";

      document.querySelector("#frameContainer").appendChild(dynamicFrame);

      await waitForLoad(dynamicFrame);

      dynamicFrame.src = "data:text/html,iframe2";

      await waitForLoad(dynamicFrame);

      dynamicFrame.src = "data:text/html,iframe3";

      await waitForLoad(dynamicFrame);

      dynamicFrame.src = "data:text/html,iframe4";

      await waitForLoad(dynamicFrame);

      dynamicFrame.src = "data:text/html,iframe5";

      await waitForLoad(dynamicFrame);

      location.href = "file_bug1364364-2.html";

    </script>

  </body>

</html>