Thanks Ruben et al. for the suggestion, but it does not work for me. The Firefox window seems to loose focus (light grey color buttons), but the fullscreen window do not come in front. I am using Fedora 20.

I also tried
(if
         (is (window_class) "Wine")
    (begin
        (focus)
    )
)

It used to work with application name: plugin-container, but not since the last update (June 3).

The alt-esc method works but is not user friendly for the wife!


Here is the output of my xlsclients -l in terminal while a window is in fullscreen.  It does not seem to show anything relevant.

Window 0x240009e:
  Machine:  localhost.localdomain
  Name:  skype-bin
  Command:  skype-bin
  Instance/Class:  skype-bin/Skype-bin
Window 0x600001:
  Machine:  localhost.localdomain
  Name:  gnome-settings-daemon
  Icon Name:  gnome-settings-daemon
  Command:  gnome-settings-daemon
  Instance/Class:  gnome-settings-daemon/Gnome-settings-daemon
Window 0xe00001:
  Machine:  localhost.localdomain
  Name:  gnome-shell
  Icon Name:  gnome-shell
  Command:  gnome-shell
  Instance/Class:  gnome-shell/Gnome-shell
Window 0x1200001:
  Machine:  localhost.localdomain
  Name:  ibus-x11
  Icon Name:  ibus-x11
  Command:  ibus-x11
  Instance/Class:  ibus-x11/Ibus-x11
Window 0x1600001:
  Machine:  localhost.localdomain
  Name:  abrt
  Icon Name:  abrt
  Command:  abrt
  Instance/Class:  abrt/Abrt
Window 0x1c00001:
  Machine:  localhost.localdomain
  Name:  devilspie
  Icon Name:  devilspie
  Command:  devilspie
  Instance/Class:  devilspie/
Window 0x2000001:
  Machine:  localhost.localdomain
  Name:  evolution-alarm-notify
  Icon Name:  evolution-alarm-notify
  Command:  evolution-alarm-notify
  Instance/Class:  evolution-alarm-notify/Evolution-alarm-notify
Window 0x2600001:
  Machine:  localhost.localdomain
  Name:  skype-bin
  Icon Name:  skype-bin
  Command:  skype-bin
  Instance/Class:  skype-bin/Skype-bin
Window 0x2400002:
  Machine:  localhost.localdomain
  Name:  skype-bin
  Command:  skype-bin
  Instance/Class:  skype-bin/Skype-bin
Window 0x1400001:
  Machine:  localhost.localdomain
  Name:  Firefox
  Icon Name:  firefox
  Command:  firefox
  Instance/Class:  firefox/Firefox
Window 0x2a00001:
  Machine:  localhost.localdomain
  Name:  plugin-container
  Icon Name:  plugin-container
  Command:  plugin-container
  Instance/Class:  plugin-container/Plugin-container
Window 0x3200001:
  Machine:  localhost.localdomain
  Name:  M�t�o
  Icon Name:  M�t�o
  Command:  org.gnome.Weather.Application
  Instance/Class:  org.gnome.Weather.Application/Org.gnome.Weather.Application
Window 0x3400001:
  Machine:  localhost.localdomain
  Name:  org.gnome.ControlCenter.SearchProvider
  Icon Name:  org.gnome.ControlCenter.SearchProvider
  Command:  org.gnome.ControlCenter.SearchProvider
  Instance/Class:  org.gnome.ControlCenter.SearchProvider/Org.gnome.ControlCenter.SearchProvider
Window 0x3600001:
  Machine:  localhost.localdomain
  Name:  seahorse
  Icon Name:  seahorse
  Command:  seahorse
  Instance/Class:  seahorse/Seahorse
Window 0x3800001:
  Machine:  localhost.localdomain
  Name:  nautilus
  Icon Name:  nautilus
  Command:  nautilus
  Instance/Class:  nautilus/Nautilus
Window 0x3a00001:
  Machine:  localhost.localdomain
  Name:  bijiben-shell-search-provider
  Icon Name:  bijiben-shell-search-provider
  Command:  bijiben-shell-search-provider
  Instance/Class:  bijiben-shell-search-provider/Bijiben-shell-search-provider
Window 0x3c00001:
  Machine:  localhost.localdomain
  Name:  org.gnome.Contacts.SearchProvider
  Icon Name:  org.gnome.Contacts.SearchProvider
  Command:  org.gnome.Contacts.SearchProvider
  Instance/Class:  org.gnome.Contacts.SearchProvider/Org.gnome.Contacts.SearchProvider
Window 0x4000001:
  Machine:  localhost.localdomain
  Name:  Terminal
  Icon Name:  Terminal
  Command:  gnome-terminal-server
  Instance/Class:  gnome-terminal-server/Gnome-terminal-server


Thank you for your help!