[Advanced Browser Security] Block pages that prevent access to downloaded files and to websites can include custom messages. You can now add a link that will appear below the custom messages. For example, you could add a link to a page that enables users to open a support ticket to request access to the blocked file.

This new functionality is included in the "Custom Messages" tab inside extension profiles. You specify the text of the link, and the URL that will open when the link is clicked.