Dreamweaver CC has “integrated a brand new rendering engine, which displays web content with the same performance and HTML5 technology support available in Google Chrome™. Now you can spend more time in Dreamweaver CC and less time switching in and out of the browser to test your content.”
The new Live Highlight feature
enables you to visualize the relationships between the HTML elements in Live View and applied CSS selectors. Inspect and highlight elements in Live View in real time while you interact with the CSS Designer. Simply hover and click Selectors in the CSS Designer to see Live Highlight in action.
Perhaps obviously by now, this is a free update for Creative Cloud members.