cron-able Vivaldi session backup script, with rotating history

viv_session_backup.sh

BACKUP_PARENT=$HOME/.config/vivaldi/viv_session
BACKUP_LAST=$(find "$BACKUP_PARENT" -type d | sort -h | tail -n 1)

VIVDIR=$HOME/.config/vivaldi/Default

diff "$BACKUP_LAST/Current Session" "$VIVDIR/Current Session" > /dev/null 2>&1
if [ $? -eq 0 ]; then
	#echo "no change"
	exit 0;
fi

TMPDIR=$BACKUP_PARENT/$(date "+%Y%m%d_%H%M%S")
#echo $TMPDIR
mkdir -p "$TMPDIR"

cp -p "$VIVDIR"/Last\ * "$VIVDIR"/Current\ * "$TMPDIR"

#prune old dirs
find "$BACKUP_PARENT" -mindepth 1 -maxdepth 1 -type d | sort -h | head -n -10 | xargs rm -rf

This probably works for any Chrome-based browser.