"Download Actions" in Firefox?

I use Citrix to connect to my office; I have generally installed the Citrix linux client (downloaded from www.citrix.com) on Mepis. What used to happen is that after installation, launching an application that Firefox did not recognize would prompt me to download or open the file. I would choose 'Open', and tell it to open with the citrix client at /usr/lib/ICAClient/wfica. Worked great.

In Beta-4, the default action is now set to download everything to the desktop. No problem, I thought; I changed the behaviour to "Ask me where to save every file".

Next time I try to launch a Citrix application, the only option I get is to save the file. I need to choose "Open". I want to tell Firefox to open the file with the Citrix client, not save it, but this is no longer an option.

I notice that there is no "Download Action" for .ica files, which used to be there when I was running 3.4.3. I thought perhaps I could fix this by adding a new Download Action for Citrix (.ica) files. Unfortunately, that does not seem to be possible - "Edit, Preferences, Donwloads, View and Edit Download Actions" in Firefox doesn't let you _add_ a new download action, only edit existing ones.

Konqueror, unfortunately, does not work well with Citrix - it recognizes and tries to open Citrix .ica files, goes through the motions, and actually opens the program on the remote server, but never displays it locally, which makes it somewhat difficult to use .

So... Does anyone know how to ADD a new download action to Firefox?

-- B