In the last few weeks I’ve been playing around with WebViews a lot and found out a few interesting differences (not necesserely documented) between the legacy implementation up to Jelly Bean and the brand new Chromium-based one in KitKat. If you don’t know what I’m talking about - after all, the API has mostly remained untouched apart some nice additions, more about this in a bit - a couple of useful links by the Google folks are this and this.