У вашего броузера проблема в совместимости с HTML5
In Part 1, I'll power up my Firepower Threat Defense firewalls, management center, and jump host. Configure both FTD appliances in a fail over pair, assign some basic networking, and NAT. At the end of part 1, our jump host has Internet access via the FTD pair, but no ACLs or NGFW features are in use.
http://blog.networkknerd.com/2018/01/cisco-firepower-threat-defense-ftd-in.html