I, actualy, don't know where to ask this, but this can be related to Linux.
Firefox on Arch Linux always asks about download destination, even if there's a default download destination folder set up through options interface or even about:config.
How can I fix that?
It's been normal till 22.0. I've tried to re-create profile or even create new, clean one, and try there and still got the same problem.
I've also tried to ask this question on #firefox @ freenode, but haven't got any reply.