I downloaded the cd image from http://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/current/amd64/iso-cd/
which directed me to this mirror http://caesar.acc.umu.se/cdimage/unofficial/non-free/cd-including-firmware/current/amd64/iso-cd/firmware-8.4.0-amd64-netinst.iso which seems to be missing the firmware files. Wasn't sure how to report this, hence this email. Thank you, and apologies if I'm wrong. It happens. Often. Angela