Reports

This is a bug, and in fact it exists in some browsers. At least firefox-137, the latest of 2025-05, does. This has been asked repeatedly in stackoverflow.com [1] (2016) [2] (2019) [3] (2021).

To check it, save the code below as old.html, and open it with your browser.

<!DOCTYPE html>
<html>
<head>
    <title>Old page</title>
    <script>
        window.onload = function() {
            location.replace('http://example.com');
        };
    </script>
</head>
<body>
No body.
</body>
</html>

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