Huh? Firefly is the anti-ST:TOS.
Kirk would not come aboard, and blow away a gub'mint agent without so much as "Can we talk?", and a hug.
Mal Reynolds did.
And the movie can stand by itself, imo, although I did see "Firefly" when it was on the Skiffy Channel.
Actually, my perception of Star Trek, TOS is that it was basically a western in Sci-fi clothes. I do see a lot of similarities to ST TOS and Firefly in the way situations are handled by the two captains, Prime Directive notwithstanding.
I call Firefly a sort of “life and times of Han Solo before he met Luke Skywalker” as well.
I remember the first episode of ST TOS. It was a week before it was supposed to air. A Thursday night. I was so excited I turned to that station just to remind myself to tune in the next week. To my shock and pleasure, there was a “Sneak preview” episode. It was the salt-sucking beast episode. I think I’ve seen every single episode of that show at least 15 times.
FWIW, I call TNG “Star Trek for women”. But the interesting thing about Firefly is that women really like the show. My wife thought it was very entertaining and funny. She really liked the characters and their interactions. She is NOT a sci-fi fan normally.