No. Brown dwarfs are not stars in the usual sense. NASA describes them as objects more massive than planets but not quite massive enough to be stars—typically about 13 to 80 times the mass of Jupiter. Some form the way stars do, from collapsing clumps of gas and dust, but they never gain enough mass for sustained hydrogen fusion on the scale of a main-sequence star.
Because of that, they emit almost no visible light (astronomers often detect them in infrared). That is why they are sometimes nicknamed “failed stars,” even though they sit in their own category between giant planets and true stars.