Package: debian-installer Version: 20150422+deb8u3 What I've done :
for installing firmware (for wireless card), I put the on a USB stick nowadays, the vast majority of USB stick is formatted FAT32, wich is almost read by all OS What was expected : check-missing-firmware should have loaded the missing firmware What happened : Nothing I managed the problem by using an old small key and formatting this key in FAT FAT32 support should be used by check-missing-firmware