Of late Sony has really been opening up to the developer community; the Xperia S was supported in AOSP for a little while and now, just a couple of days after Sony announced that they would be working with Mozilla on a Firefox OS based device we now have this.
Sony have shown off an experimental Firefox OS ROM for the Xperia E! This may well be a cheap Android handset, but it also matches Geeksphone's Keon in the spec department so it was a perfect fit for Firefox OS from the off!
A brief video demo of Firefox OS in action on the device is embedded below!
Via TheVerge.