How to Get thumbnail previews working with Firefox
When you use IE8 with multiple tabs opened in windows 7, you can see the all tab's thumbnail just by clicking the ie8 icon in your taskbar but this feature is not available in Firefox because it is not supported in Firefox yet. but you can do this by using Minefield. Minefield is the software which is created by the same group of people who created Firefox. After installing and using Minefield, you will still be able to use Firefox Add-ons, Extensions and you will experience the same speed of Firefox with new feature of thumbnail preview of all of your tabs in your Minefield.