- Geolocation
- @font-face
- Video and Audio support
- XHR enhancements
- TraceMonkey
There are several other features that are scheduled for Firefox 3.1 Beta 2 and are partially implemented in the beta 1 already. Mozilla will talk about more once Beta 2 is available. Some of the things you can expect are Worker Threads for JavaScript, new graphics, SVG and CSS capabilities and probably other things as well. The Firefox 3.1 for Developers page is the full source for new stuff that’s coming for 3.1.