The browser itself also got updated with new features. In particular, they announced pinned sites. But more importantly, they introduced a completely revamped Web inspector. Watching the presentation, I knew this was going to be huge for developers. Then I sat down and started using it on real stuff. Oh my God! My mind was blown. I felt like a kid on Christmas morning.
The Web inspector is useful for look at the DOM tree your browser has assembled from your code. This is especially useful when your site is put together from disparate parts or by consuming dynamic data.