So a Brown Dwarf is essentially just a ‘Baby Star’ that hasn’t been ‘born’ yet................
They’re often called brown dwarf “stars”, but they’re really like the article says, a gray area between planets and stars. A large brown dwarf can probably look very much like a star. At about 75 to 80 Jupiter mass actual hydrogen (proton-proton) fusion kicks in and it becomes a red dwarf. A full-fledged star.