F41 Xfce panel tab labels

[Robert Moskowitz]

I am seeing strange, to me, labels on my window tabs in the Xfce panel.

Like Firefox is labeled: Org.mozilla.firefox
Terminal:    Xfce4-terminal
Thunderbird new message:    Net.thunderbird    - But this does get 
replaced with the subject line like this missive having Wrtie:F41 Xfc...

I have looked around at various settings and don't see where this 
behavior is controlled.

Can anyone point me to where I can alter what goes into the panel tabs?

Also panel is stacking all related tabs together.  I and seeing a bullet 
with a number and then the name when I have multiple windows of the same 
app.  I have looked in Settings, both Windows Manager and Windows 
Manager Tweaks and am not finding this control.

Thank you for any guidance.