There are a lot of acts that share this name.
1) A melodic punk band from Richmond, VA that draw heavy influences from the likes of Jawbreaker and Rites of Spring. (http://www.myspace.com/friendlyfireva)
2) A fast paced street punk band from Munich, Germany(http://www.myspace.com/friendlyfiremuenchen)
3) About 3 or 4 brocore type bands.
4) Friendly Fire produce deep Drum and Bass from St Petersburg , Russian Federation. "Super Logic" and "No Read more on Last.fm