Install Firefox for mass deployment with Yo notifications

ff-install.sh

#!/bin/bash
# Notify user if older version is running

USERNAME=`ps -ajxww | grep -v grep | grep loginwindow | awk '{print $1}'`    
USERID="$(id -u $USERNAME)"
FFPKG="Firefox-60.0.2.pkg"

# Check for running firefox
if [[ ! "$(pgrep -l firefox | awk '{print$2}')" = "" ]]; then
  launchctl asuser ${USERID} /Applications/Utilities/yo.app/Contents/MacOS/yo -t "Firefox Update" -s "Restarting Firefox" -n "Firefox updated to version 60.0.2"
  launchctl asuser ${USERID} sudo -u ${USERNAME} osascript -e 'quit app "Firefox"'
  /usr/sbin/installer -pkg "/usr/local/etc/packages/ff/$FFPKG" -target /
  launchctl asuser ${USERID} sudo -u ${USERNAME} open -a "/Applications/Firefox.app"
else
  /usr/sbin/installer -pkg "/usr/local/etc/packages/ff/$FFPKG" -target /
fi

exit 0