Apple announced the immediate availability of a public beta of Safari 4 on Tuesday. The new version of the Web browser includes what Apple calls the Nitro JavaScript Engine can run JavaScript 4.2 faster than Safari 3, and the update rolls in a long list of new features that includes Cover Flow browsing for history and bookmarks.
Safari 4 also includes Accessible Rich Interactive Applications, full page zoom support, CSS effects and CSS Canvas support, HTML 5 offline support, offline database support, and smart search recommendations. It sports several features for developers, too such as a new Web Inspector, a page elements view, a JavaScript debugger, a page resources view, and more.
The Safari 4 public beta is available for both Mac and Windows as a free download at the Apple Web site.