dpkg -i firmware-brcm80211_0.43_all.deb

dpkg -l firmware-brcm80211

Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                            Version              Architecture         Description
+++-===============================-====================-====================-====================================================================
ii  firmware-brcm80211              0.43                 all                  Binary firmware for Broadcom 802.11 wireless cards