I just attempted to install the newest Linux Citrix ICA client on my machine, and upon a successful install, an error similar to this one popped up when trying to run the client from Firefox:
Contact your help desk with the following information:
ble, ble ...
the issue of the server's security certificate (SSL error 61).
The solution is to make Firefox’s certificates accessible to Citrix, like so:
sudo ln -s /usr/share/ca-certificates/mozilla/* /opt/Citrix/ICAClient/keystore/cacerts
I didn’t test it on the Debian yet.