If you have installed Citrix Web ICA client before installing Firefox Mozilla, Citrix ICA web link site might give you message to install Citrix ICA Client though you already have it installed.
To resolve this issue, follow the below steps:
- Uninstall the existing Citrix ICA client from Add/Remove program
- Launch Firefox Mozilla and browse your internal ICA website, it will give you message to download and install the ICA client somewhere at the bottom of the web page. Click the link and download the client.
- Install the downloaded client. Once installed successfully, close the browser and restart it.
- It should solve the issue.
Also, Refer to the support article at Citrix site http://support.citrix.com/article/CTX105973