I am having some troubles with the WIFI on my Macbook using Tails (USB). I encountered a problem similar once when setting up an Arch Linux USB system but I as able to find the necessary drivers and install them properly (Arch doc is very well done).
However I have absolutely no idea how to do this in Tails (or Debian in general). I don't have ethernet so I need to download manually the packages and install them manually on the system after.
The device is Broadcom 14e4:43a0.
How should I achieve that?