If you don't trust the closed source binaries of Citrix (and you shouldn't when you work in an enterprise organisation that takes security seriously), then here is a Vagrantbox that installs the citrix software and firefox and you can run it from within that sandbox
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Clone this repository 
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Downdload the Citrix Workspace app https://www.citrix.com/downloads/workspace-app/linux/workspace-app-for-linux-latest.html Select - Debian Packages
- Full Package (Self-service support)
- Citrix Workspace app for Linux (x86_64)
 
 
- Full Package (Self-service support)
 and put the file in the directory of this repository. 
- Debian Packages
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Run vagrant up
vagrant ssh -- -X firefox -no-remote
Then visit your citrix server url