The check system in for the LMS in the check system link is reporting that the PDF viewer needs to be updated though it has already been updated.
SAP Learning Management System
There has been a change to the call response from firefox that we are no longer getting a positive result on the check.
This feature is salted to be removed from the product as of Q3 of 2018 ( This is a tentative time and may be changed prior or post the current slated time).
KBA , LOD-SF-LMS-ADM , System Admin, Global Variables, References , Problem