The first cross browser testing software tool that allows you to test using 22 sandboxed web browsers, 5 mobile browsers as well as traditional screenshot testing in 60+ web browsers. Multi-Browser Viewer's screenshot testing also has a great new side-by-side and image overlay comparison, enabling a designer to easily pinpoint any rendering differences between browsers. However the main new addition of version 3 is the mobile browsers/simulators, including an iPhone and iPad Mobile Safari emulator for windows, which is only available as part Multi-Browser Viewer.