non-free firmware not found despite unofficial CD

[Emanuel Berg <moasen@zoho.com>]

First I downloaded this ISO:

    https://cdimage.debian.org/cdimage/unofficial/non-free/cd-including-firmware/current/i386/iso-cd/firmware-9.2.0-i386-netinst.iso

Then I burned it onto a CD-R, and booted into
the installer.

The computer is a HP Compaq 6720s laptop.

However the installer doesn't get far before it
says the network needs nonfree firmware, namely

    b43/ucode13.fw
    b43-open/ucode13.fw

Despite searching explicitly on the CD the
assessment stands.

After that, the network
auto-config/DHCP/connect fail.

What's going on? Is that firmware not included
even in the firmware edition of Debian?

TIA 

-- 
underground experts united
http://user.it.uu.se/~embe8573