Description
In Orion, when a website provides a broken favicon, the default favicon is not displayed.
Steps to reproduce
This issue can be replicated by using a new clean Orion profile and loading a webpage with a broken favicon link using the following HTML:
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Test No Favicon</title>
<link rel="alternate icon" type="image/x-icon" href="https://app.shortcut.com/static/images/favicon-caed869783.ico"/>
</head>
<body>
</body>
</html>
Actual behaviour
It appears as an invisible tab when it is pinned or in vertical compact mode.
Expected behaviour
I expect Orion to display the default favicon when the website's provided favicon is broken or inaccessible like Safari:
Environment
Browser version: 0.99.128.2.1.1-rc
OS version: Sequoia (15)
