It appears that using a file path for a URL bookmark is not working in Spark 2.6 RC1. It does work in 2.5.
In the openfire server I have the Client Management plugin installed. In the URL bookmarks section, I have a bookmark with the url of "file://s:\getmachinename.vbs". This file is on a network share with open permissions. The title of the bookmark shows up in the client side but when clicked, it doesn't do anything. I have verfied the file exists and is working on that shared drive. Can anyone else confirm this?