Raspberry pi kiosk with chromium

kiosk.service

[Unit]
Description=Chromium Kiosk
Wants=graphical.target
After=graphical.target

[Service]
Environment=DISPLAY=:0.0
Environment=XAUTHORITY=/home/pi/.Xauthority
Type=simple
ExecStart=/bin/bash /home/pi/Desktop/kiosk.sh
Restart=on-abort
User=pi
Group=pi

[Install]
WantedBy=graphical.target

kiosk.sh

#!/bin/bash

# Stop the blanking out of the screen
xset s noblank
xset s off
xset -dpms

# Remove the mouse pointer when it has been
# idle for longer than 0.5 mins
# To remove the mouse instantly remove
# -idle 0.5 from the command
unclutter -idle 0.5 -root &

# Search chromium preferences file and
# clear out any flags that would make
# warning bar appear.
sed -i 's/"exited_cleanly":false/"exited_cleanly":true/' /home/pi/.config/chromium/Default/Pre$
sed -i 's/"exit_type":"Crashed"/"exit_type":"Normal"/' /home/pi/.config/chromium/Default/Prefe$

# If chrominum suddenly crashes or closed we
# do not have to use mouse or keyboard to
# clear the warning message
/usr/bin/chromium-browser --noerrdialogs --disable-infobars --kiosk https://sanjit.me &

# Mimic pressing Ctrl+tab every 15 seconds
while true; do
      xdotool keydown ctrl+Tab; xdotool keyup ctrl+Tab;
      sleep 15
done