Citrix and SSL Error 61 Ubuntu 16.04
1) Install " Receiver for Linux Web client (x86_64)" 2) Assure that the Firefox Plug-in "Citrix Receiver for Linux" is enabled and Allowed 3) Export the certificate from Firefox clicking on the lock and viewing the Certificate 4) Save the exported certificate to the folder: "/opt/Citrix/ICAClient/ keystore/cacerts" in a *.pem format