Box-office and TV ratings are apples and oranges."2012" is 35th highest grossing movie of all time according to the always reliable wikipedia, should I then assume its the 35th best movie ever made???
Then I guess American Idol is the best TV show ever made?
You do realize Firefly was not even aired in its entirety, and it was aired out of order. If you watch the whole show you'll realize there are a lot of subtle jokes and dialogue that refer to prior episodes. It was a showkiller to move the episodes around like that.