The AnyConnect Premium license enables customers to provide secure, granular and flexible client and clientless SSL VPN access to their remote users and business partners. Deployments benefit from an incremental level of security with the Cisco Secure Desktop (CSD) suite of features - CSD Secure Vault, CSD Hostscan, keystroke logger detection
Unfortunately Clientless VPN is not supported on any version of FTD, not even on the latest version 6.5. This feature is not expected in the upcoming FTD 6.6 either. If you speak to your Cisco partner they might be able to give you further roadmap details. HTH Cisco ASA Clientless SSL VPN - YouTube Jan 18, 2018 Configuring Clientless Access Jan 23, 2019
Cisco Secure Desktop (CSD) is a multifunctional component of the Cisco SSL VPN solution that can also be used with Clientless connections to protect against these security risks. Additionally, customers can use the Cisco AnyConnect client.
10.3.1.1 Lab C - Configure Clientless Remote Access SSL Jun 21, 2018 Hackers now popping Cisco VPN portals • The Register
10.3.1.1 Lab C - Configure Clientless Remote Access SSL
The video looks into some of the security features that can be implemented as part of Cisco ASA SSL clientless VPN. These features include Web ACL, Smart-Tunnel List, Portal Access Rule, URL bar removal, and homepage URL. 10.3.1.1 Lab C - Configure Clientless Remote Access SSL Jun 21, 2018 Hackers now popping Cisco VPN portals • The Register