Hello,

I'm working with a customer who is deploying Firefox ESR 60.5 as a published 
application in Citrix Xenapp. They have noticed (and we have reproduced) that 
after disconnecting, the menu button and menu (ALT) options on the menu toolbar 
do not work. You click, and the highlight changes on the button, but the menus 
never appear.

After further investigation, I determined via our WindowHistory tool (similar 
to Spy++) that the menu window is actually being drawn 1px wide at 0,0,0,0 on 
the screen (and is therefore practically invisible). I created a test HTML page 
to report screen size using Javascript and after reconnect it also shows the 
screen being 0x0.

This doesn't occur in an RDP session, so it seems to be some unforeseen 
interaction between our Citrix display drivers and Firefox, but this behavior 
(both the menu and js screen size reporting) does not occur in other browsers 
that I have noticed.


Can you provide insight on how Firefox is determining screen size, or perhaps a 
workaround for the menu button that doesn't rely on this calculation? Thanks!

[cid:[email protected]]

Wes Holton
Senior Escalation Engineer
Technical Support
T +1 678-225-3807



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