Hi,
during install of a Debian Installer Jessie Beta 2 ( http://cdimage.debian.org/cdimage/jessie_di_beta_2/multi-arch/iso-cd/debian-jessie-DI-b2-amd64-i386-netinst.iso ) d-i ask using non-free packages, but at the end of the install process, packages like firmware-linux-nonfree and amd64-microcode/intel-microcode are not installed.
Please consider, if user choose to use non-free packages, to include them.