There are multiple artists with this name: 1) Firma is a Polish hip-hop group create in 2000 in Kraków (Cracow), Poland by raper Kali & Tadek. In 2001 to the group joined Popek & Pomidor (Tomato) from Legnica and then Bosski Roman. Debut publishing group “Pierwszy nielegal” appeared the same year. In 2002 effort Zooteka label released the album “Z dedykacją dla ulicy”.
In 2005 appeared a second group of illegal “Nielegalne rytmy”.