(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(update-notifier:2988): GLib-CRITICAL **: g_strchug: assertion `string != NULL' failed
(update-notifier:2988): GLib-CRITICAL **: g_strchomp: assertion `string != NULL' failed
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(firefox:2500): Gtk-WARNING **: Unknown paper size A4
(gnome-settings-daemon:2204): GLib-CRITICAL **: g_variant_get_int32: assertion `g_variant_is_of_type (value, G_VARIANT_TYPE_INT32)' failed