32 or 64 bit Firefox

So now that I'm running 64 Bit on the desktop, I wanted some feedback on which version of Firefox everyone is using.

I have the 32 bit version on my laptop and it's running 64 bit. It hangs quite a bit and flash is a downright pain the butt on it.

Does anyone have any experiences with Firefox 64 bit?

You know, I haven't the foggiest.
I would suspect 32, because fo flash issues.
I am running the one that downloaded.