Run XKill with a right-click on desktop.
xkill is a tool for terminating misbehaving X clients. This action adds a dektop context menu to kill any X application that missbehave.
Under Wayland it will work only with X-Wayland applications e.g. Firefox-ESR, which is the only one I've tested with so far
The following programs must be installed and available:
- `x11-utils