openbox-session provides two autostart mechanisms: XDG
Autostart (which only works if python-pyxdg is installed) and Openbox's
own autostart mechanism.
Openbox's own autostart mechanism:
sources /etc/xdg/openbox/environment
sources ~/.config/openbox/environment
runs /etc/xdg/openbox/autostart
runs ~/.config/openbox/autostart
Issues regarding commands in ~/.config/openbox/autostart being executed out of order (or skipped altogether) are often resolved by the addition of small delays. For instance:
xset -b
(sleep 3s && nm-applet) &
(sleep 3s && conky) &