lol yea it says "firebox" but it's just a play on words. It really a charcoal tray. I love the adjustable feature of it and I made a fire basket for mine similar to the drums but rectangular 9x13x7. I can throw two 12-15 lb briskets indirect in the legacy and take a four hour nap. The basket really just helps have a much longer burn time, usually 6-7 hours depends on wind maybe a little longer.
A firebox in Texas has a whole different meaning lol, just sayin.
Still overall just saying that bang for the buck the Legacy is hard to beat, ain't none of the really good grills out there that are inexpensive for sure.
Lots of really great options out there for sure and I always say you should asses what you like to cook the most and how much do you plan to cook on a regular basis.
keep The Smoke Light amigos