#!/bin/bash

# This comes with no warranty whatsoever, bla bla bla.
# Use at own risk. And may the force be with you.

USER=some_user_name
HOME_URL=http://www.opensourceschool.de

xhost +
sudo -u tux firefox --display ':0.0' &
while [ ! -d /home/tux/.mozilla/firefox/ ] 
do
  sleep 1
done
sleep 5
PROFILE_DIR="$(LOCALE= ls -l /home/$USER/.mozilla/firefox/ | grep default | grep -o '[a-z0-9\.]*default$')"
echo "user_pref(\"browser.startup.homepage\", \"$HOME_URL\");' > /home/tux/.mozilla/firefox/$PROFILE_DIR/user.js

sleep 1
killall firefox