Apple has released a public beta of Safari 4 for Mac OS X and Windows. The new version introduces HTML 5 support for offline technologies, support for advanced CSS Effects including reflections, gradients, and precision masks, and improved JavaScript performance. Apple claims that new version runs JavaScript 4.2 times faster than Safari 3, more than 3 times faster than Firefox 3, and up to 30 times faster than Internet Explorer 7. They also claim that Safari 4 loads html web pages 3 times faster than Internet Explorer 7 and almost 3 times fasters than Firefox 3. Apples performance tests were run on 2.8 GHz Intel Core 2 Duo iMac with 2GB of memory running Windows Vista.