You have to be wayy more detailed in what you're asking about next time but I'm going to guess you mean whether the song is tuned to DROP D or DROP C for Bass.
And honestly for bass tabs for this song I've seen everything from standard tuning (EADG) to every kind of DROP tuning.
I'm not going to peel through hundreds of tabs but what I do know is that the bassist for Paramore, Jeremy Davis, favors the DROP C# tuning (or Drop D-Half step down, they're the same) for most of his songs which is C# G# C# F#.
So I'm guessing that's your best bet.