Claude Vedovini

A plugin that uses the featured image in your posts as a favicon for 
that post. You can also set a default favicon and use it as a default featured 
image.
<h3>Privacy Policy</h3>
This plugin does not collect any personal information from your visitors.

Featured Favicons

A plugin that uses the featured image in your posts as a favicon for

Web Guy

Add a favicon.
Set the favicon URL under Appearance > Customize > Site Identity > Site Favicon.
This plugin is especially useful if you’d like to set a Site Icon, but also need to set a unique favicon separate from it.

Featured Favicons vs Site Favicon