Dear All I noticed due to recent upgrade of Firefox (57.0) Add-on “JSPrintSetup” as sated at Koha wiki https://wiki.koha-community.org/wiki/Setting_up_slip_printer_to_print_silent... is not working because of some compatibility related issues. Hence you may once try the instruction given at another link of Koha wiki. https://wiki.koha-community.org/wiki/Configure_Automatic_Receipt_Printing I have followed the above second option/link and found its working fine and accordingly made one manual http://mishravk.com/wp-content/uploads/2017/12/koha-printer-setup.pdf with screenshot for more clarity and ease. The manual is available at : http://mishravk.com/2017/12/koha-print-slip/ With Regards, Vinod Kumar Mishra, Assistant Librarian, Biju Patnaik Central Library (BPCL), NIT Rourkela, Sundergadh-769008, Odisha, India. Mob:91+9439420860 Website: http://mishravk.com/ ORCID ID: http://orcid.org/0000-0003-4666-7874 *"Spiritual relationship is far more precious than physical. Physical relationship divorced from spiritual is body without soul" -- Mahatma Gandhi* -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.