Or there is always Emmaus - right by the Unifr Perolles campus, on Route de la Pisciculture...and they have a little truck to do deliveries if necessary.
http://www.emmaus-arce.ch/info_fribourg_f_2.htm
And you get a discount if you have a student card..
Also, if you are looking for cheap furniture near Fribourg, there is Conforama (also at Grange-Paccot, and near to Hiob-International) and Lipo at Agy....all reachable by the No. 1 bus.