How to center a flexible box in the document?

Today, while working with flexible box model in FF4, I noticed that I can't center a container in the docu开发者_如何学JAVAment using margin: 0 auto;.

Does anybody know any way of centering this container? In Webkit it works as expected.

Try this:

for FF

display: -moz-box;
-moz-box-orient: horizontal;
-moz-box-pack: center;
-moz-box-align: center;

for normal case

display: box;
box-orient: horizontal;
box-pack: center;
box-align: center;