When Adobe Launched CS Live, they introduced a new online service for web designers and developers called BrowserLab. This tool allows designers to preview screen shots of websites on a variety of browsers for PC and Mac. This covers Safari, Firefox, Internet Explorer, and Chrome. There have been tools used for this before, but nothing as quick and easy as this application. Instead of keeping all browser types and versions on your computer, this program accomplishes the same browser check for free. Here is a good video that shows a demo of this tool.
Interesting, i'm not sure though if i'll be confident to use it rather than checking it manually on each known browser.