I've received the email notification that 'New Shavlik XML Available' is available (XML 18.104.22.16800 Last Modified 02/11/2016) but can't see 'Firefox ESR 38.6.1' or 'Firefox 44.0.2' in the list of available updates despite opening and closing the SCCM console several times. Is there anything further I need to do to get them appear?
I believe you may have received the update for Shavlik Protect. Those updates are typically released on Tuesdays and Thursdays. The Catalog for Patch is typically released on Wednesdays and Fridays. I have confirmed those will be in todays catalog release for Patch.