Aleksandr Bogdanov:
Oh I'd never want to do a Firefly game where your the characters from the show, just one in the universe where your other people just trying to make a living.
Yeah, I've done those, too. They collapse just as quickly. Maddening, really. Maybe I'll try to run one someday...
There have been multiple Firefly game systems, DST. The system is never the problem. They are straightforward yet dripping with flavor from the show. I think one might be similar to Savage Worlds? And SW works very well on RPOL.