One of the few complaints that we had when we tested Firefly against Serenity was the monolithic quality of the attributes — Physical, Mental, and Social. We felt that this didn’t allow the characters to be unique enough in some ways. So here’s my “fix” for the attributes in Firefly…use the attributes from Serenity.
When making a character, use Agility, Strength, Vitality, Alertness, Intelligence, and Willpower, and build the character for 48 points — that gives you the same d6, d8, and d10 (x2) dispersion of Firefly. You can use these more varied attributes to customize your characters even more. Some maybe your character is very strong, but can’t walk through an empty room without tripping. In Firefly, you might have chosen a d8 to balance these traits, or gone with d10 to model the big bruiser you wanted to build. With this you can give the character a d6 Agility and d10 strength.
What about Social? Here the old attribute would be Willpower.
Otherwise, you roll the same way as you do with unadulterated Firefly.