Package: xfce4 Version: 4.14 I upgraded to this version just now and when the panel restarted, the Window Buttons applet started displaying the number of windows for grouped windows in a tiny white font in a tiny black circle overlaid on the bottom-right corner of the button's icon.
This is just barely legible for single digit numbers. it is cropped and unreadable for 2+ digits (i routinely have 30 or 40 or more firefox and/or chromium windows open at a time. and a dozen or more qpdfview or okular windows) Before this upgrade, it was just a parenthised number (e.g. "(30)") after the button name. this was readable and useful. I have no objection to this as an option for those who want it, but there really needs to be an option to revert to the previous display behaviour. please forward this bug report to upstream. craig