Bug 251857

Steps to reproduce:
1. Open the attached sample "index.html" in Safari
2. Hold down "context menu here" to open the contextual menu

Expected results: It shows the URL and preview of https://www.apple.com/

Actual results: It shows the URL and preview of https://www.webkit.org/

Note that if you copy or tap the link, you'll get https://www.apple.com/ rather than https://www.webkit.org/.

Here's the relevant HTML source:

```
<p><a href="https://www.webkit.org/">context menu here</a></p>
<script>document.querySelector("a").addEventListener("mousedown", (event) => {
    event.target.href = "https://www.apple.com/";
});</script>
```