Improves performance of JavaScript, Top Sites, and trackpad pinch gestures. Adds faster page loading with DNS prefetching and improved page caching, and Bing search option in the Search Field. Improves support for HTML5, auto-complete in the Smart Address Field, tabbed browsing, Full History Search, Private Browsing, protection from cross-site scripting with XSS auditing, support for web applications that use JavaScript Object Notation, and developer tools. Improves performance and stability when pasting text into text fields in webpages, auto-complete functions, PDF handling, and transferring images from Safari to iPhoto, when using Facebook and eMusic. Improves reliability of authentication to Windows IIS. Fixes an issue that prevented some users from dragging files when logged into etrade.com.