After installing privoxy and enabling the privoxy.service in systemd, the
service is automatically started at boot but when only a wlan connection is
setup by NetworkManager, privoxy needs to be restarted once before it can be
used (verified in Firefox only, so far).
This is similar to #977944 but in this case I do not get any error messages in
journalctl about privoxy entering 'failed' state. Also `systemctl status
privoxy.service` shows that privoxy is up and running.
When a wired connection is present at boot, everything works nicely, even if
the wired connection is removed and one switches to wlan.
The necessity to restart the privoxy service makes using privoxy as a daemon
rather painful.