Cooliris Previews is a free browser add-on that lets you preview links and rich media without clicking or leaving your current page, so you can browse the web faster than ever. Simply mouseover a small Cooliris icon next to the link, and a preview window instantly appears with your content. No more clicking back and forth!
Once I started using this in my firefox, only then I realized its potential. Some of the benefits I think are very good-
1) This preview will go away once you remove your mouse from the preview.
2) If you simply go to the next link while watching one preview, it will show the next preview in the same window. This feature is extremely useful when I need to browse many DDTS listed in hotlist.
3) This is really fast enough to say that it saves my browsing time.
4) You can customize this preview window, this is really amazing stuff.
5) This is available for Internet Explorer also.
You can install this small plugin from http://www.cooliris.com/site/firefox/
Welcome to the fast and efficient browsing.