The vendor has published 1 unique mention(s) for this bug: 1. Attempts to open a contextual menu or dialog might fail when using a published instance of Mozilla Firefox application in seamless mode. The issue occurs when using Citrix Workspace™ app for Windows with the value of TWISeamlessFlag set to 8 (default value). The menu appears and then quickly disappears. To enable the fix, run the following command on the Linux VDA: sudo /opt/Citrix/VDA/bin/ctxreg create -k "HKLM\System\CurrentControlSet\Control\Citrix\TWI" -t "REG_DWORD" -v "SeamlessFlags" -d "0x00000008" --force Latest urls for this bug: 1. https://docs.citrix.com/us/en/linux-virtual-delivery-agent/2204/whats-new/fixed-issues.html