Firefox implements it without prefix (it is finalized). It will be enabled by default in Fx 20. It supports both horizontal and vertical flexboxes but not yet multiline flexbox.
Opera supports it fully and without prefix too.
Webkit tends to be (very) late in unprefixing (they are the only ones with prefix for Animation, Gradients, Transitions nowadays.)
Opera supports it fully and without prefix too.
Webkit tends to be (very) late in unprefixing (they are the only ones with prefix for Animation, Gradients, Transitions nowadays.)