This is a nice idea: Opera have separated their widgets from the desktop browser, allowing them to be run as standalone applications. They are cross-platform and standards compliant. You can download a Labs release to try it for yourself.
Support for the CSS Transitions module, originally proposed and implemented by the WebKit team, has just landed in the nightly builds of Firefox; it’s unsure whether this will make it into 3.6, as this is due to be released in the near future, but should be a feature in 3.7 at least.
The experimental feature will use the proprietary ‑moz- prefix; I’ve updated the demos in my previous post, Anime with CSS and WebKit, to reflect this.
After performing some brief tests there seem to be a few problems with the implementation; it’s not as smooth as it could be, and the third demo doesn’t work as it should. Update: Found an issue with the browser not recognising a value without a unit (e.g. 0 instead of 0%); fixed the demo, and filed a bug.
I’ve got a new post up at CSS3.info: Introducing the Flexible Box Layout module. It’s an overview of an alternative layout module which is already implemented in Gecko and WebKit.
The HTML5 video element is now included in Firefox, Safari & Chrome, and on its way in Opera. By using JavaScript to access the media elements API it’s easy to build your own custom controls for it; in this article I’m going to show how I built a (very) basic control interface.