sudo apt -y install gtk3-nooverlayscrollbar
sudo apt -y install gtk3-nocsd

#~/.xsessionrc and add the following code:
#
#  if [ -n "$STARTUP" ]; then
#    BASESTARTUP=${STARTUP%% *}
#    BASESTARTUP=${BASESTARTUP##*/}
#    if [ "$BASESTARTUP" = x-session-manager ]; then
#      BASESTARTUP=$(basename $(readlink /etc/alternatives/x-session-manager))
#    fi
#    if [ x"$BASESTARTUP" = x"${BASESTARTUP#gnome-session}" ] ; then
#      export GTK_CSD=0
#      STARTUP="env LD_PRELOAD=/path/to/libgtk3-nocsd.so.0 $STARTUP"
#    fi
#  fi