Broadcom WiFi b4313

https://wiki.debian.org/brcm80211

Installation

Add a "non-free" component to /etc/apt/sources.list, for example:

# Debian 8 "Jessie" deb http://httpredir.debian.org/debian/ jessie main contrib non-free

Update the list of available packages and install the firmware-brcm80211 package:

# apt-get update && apt-get install firmware-brcm80211

As the driver may already be loaded, reinsert the module to access installed firmware:

# modprobe -r brcmsmac ; modprobe brcmsmac