In addition to Extensions, another feature that's moving from the beta channel to stable is Bookmark Sync, which allows users to move from one machine to another while keeping all their favorite links to hand. Google Chrome 4.0 (188.8.131.52) also includes support for several new HTML5 features like LocalStorage, a handful of security fixes, and several performance improvements. The build is supposedly 42% faster than Chrome 3 and 400 percent faster than Chrome 1.
The new release comes less than a week after Mozilla updated its Firefox browser to version 3.6, and as Google's browser is racing past Apple Safari in popularity. If you haven't tried Chrome yet, now would be a good time to download it and give all these new features a spin.