"firefox is currently inhibiting power management"

The issue is Firefox is not running.

ps ax | grep firefox => nothing.

I'm using fully updated Fedora 40:

libxfce4ui-4.18.6-1.fc40.x86_64
libxfce4util-4.18.2-1.fc40.x86_64
xfce4-about-4.18.6-1.fc40.x86_64
xfce4-appfinder-4.18.1-2.fc40.x86_64
xfce4-battery-plugin-1.1.5-3.fc40.x86_64
xfce4-calculator-plugin-0.7.2-3.fc40.x86_64
xfce4-clipman-plugin-1.6.6-1.fc40.x86_64
xfce4-cpufreq-plugin-1.2.8-3.fc40.x86_64
xfce4-cpugraph-plugin-1.2.10-2.fc40.x86_64
xfce4-datetime-plugin-0.8.2-4.fc40.x86_64
xfce4-diskperf-plugin-2.7.0-5.fc40.x86_64
xfce4-eyes-plugin-4.6.0-5.fc40.x86_64
xfce4-genmon-plugin-4.2.0-3.fc40.x86_64
xfce4-mount-plugin-1.1.6-3.fc40.x86_64
xfce4-netload-plugin-1.4.1-3.fc40.x86_64
xfce4-notes-plugin-1.11.0-1.fc40.x86_64
xfce4-notifyd-0.8.2-3.fc40.x86_64
xfce4-panel-4.18.6-1.fc40.x86_64
xfce4-places-plugin-1.8.3-4.fc40.x86_64
xfce4-power-manager-4.18.4-1.fc40.x86_64
xfce4-pulseaudio-plugin-0.4.8-2.fc40.x86_64
xfce4-screensaver-4.18.3-1.fc40.x86_64
xfce4-screenshooter-1.11.1-1.fc40.x86_64
xfce4-screenshooter-plugin-1.11.1-1.fc40.x86_64
xfce4-sensors-plugin-1.4.4-3.fc40.x86_64
xfce4-session-4.18.4-2.fc40.x86_64
xfce4-settings-4.18.6-1.fc40.x86_64
xfce4-systemload-plugin-1.3.1-7.fc39.x86_64
xfce4-taskmanager-1.5.7-1.fc40.x86_64
xfce4-terminal-1.1.3-1.fc40.x86_64
xfce4-time-out-plugin-1.1.3-3.fc40.x86_64
xfce4-timer-plugin-1.7.2-3.fc40.x86_64
xfce4-volumed-0.2.3-33.fc40.x86_64
xfce4-wavelan-plugin-0.6.3-5.fc40.x86_64
xfce4-weather-plugin-0.11.2-1.fc40.x86_64
xfce4-xkb-plugin-0.8.3-5.fc40.x86_64
xfce-polkit-0.3-12.fc40.x86_64