how to avoid that firefox opened for first time icon is showed on every desktop in task manager

when I open firefox for the first time after boot the icon is showed on every desktop in task manager
the task manager settings are these:
https://paste.opensuse.org/32323045
show only tasks from current desktop and from current activity
in this picture firefox is opened in desktop 5 but I can see it in the task manager even if I am on other desktops, how to avoid this?
https://paste.opensuse.org/82671014

sorry wrong place please cncel this thread

Follow thread hereā€¦
https://forums.opensuse.org/showthread.php/548899-how-to-avoid-that-firefox-opened-for-first-time-icon-is-showed-on-every-desktop-in-task-manager