Initial support for the CSS Flexbox Module has been landed. It is disabled by default but can be enabled by setting layout.css.flexbox.enabled to true.
This is actually a feature I'm waiting to see on at least both Chrome and Firefox (without vendor prefixes). I haven't been tracking the spec closely enough to see how close it is to being finalized since the "new" flexbox model was adopted.
Other changes that interest me for fairly obvious reasons:
Preliminary support for WebRTC.
New HTML scaling algorithm.
Performance improvements around tab switching.
Improvement in startup time through smart handling of signed extension certificates.
Support for W3C touch events impemented, taking the place of MozTouch events.
The last one for better, less specific Javascript.
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.)
This is actually a feature I'm waiting to see on at least both Chrome and Firefox (without vendor prefixes). I haven't been tracking the spec closely enough to see how close it is to being finalized since the "new" flexbox model was adopted.
Other changes that interest me for fairly obvious reasons:
The last one for better, less specific Javascript.