Dear All
I noticed due to recent upgrade of Firefox (57.0) Add-on “JSPrintSetup” as sated at Koha wiki is not working because of some compatibility related issues. Hence you may once try the instruction given at another link of Koha wiki.
I have followed the above second option/link and found its working fine and accordingly made one manual with screenshot for more clarity and ease.
The entire credit/reference goes to : https://wiki.koha-community.org/wiki/Configure_Automatic_Receipt_Printing
by 