When a user attempts to launch a session from the StoreFront website, the session would be launched automatically via Workspace app for HTML5 instead of native Workspace app.

To switch back to native Workspace app/Citrix Receiver, install a missing Workspace app/Citrix Receiver and allow the StoreFront web to use it.

Windows Endpoint

1. Choose "User (your user ID) . Note: The browser can launch the session in HTML5 too.
   
2. To switch it to Windows Receiver, you need to choose "User (your user ID) -> change Citrix Receiver... ", then select "Detect Receiver" to let it check if any Windows Receivers have been installed:
   
   Note: If you want to switch back to use HTML5, also navigate here then choose "Use light version".

3. If it detects a Windows Receiver, a window would pop up to let you choose whether to launch the .ica file with Windows Receiver directly, choose "Open Citrix Receiver Launcher". Or you could skip it, just select "Already Installed" if you definitely confirm the Windows Receiver has been here:
   

When you use Citrix Workspace, you can click on your Profile and select: Account Settings > Advanced

You can check what is currently enabled by default and change it:

Problem Cause

By default, Workspace app/Receiver for HTML5 will only be used if the native plug-in is not installed. If the ica session is always launched via HTML5 instead of native Receivers even though there was no such setting to force the use HTML5, it may have happened that during native plug-in installation process detecting the native Receiver was skipped.