Once in a while Lifehacker’s Download of the Day is something neat. Today is one of those days, as they have Cooliris Preview (IE/Firefox/Safari):
Simply mouse over any link or thumbnail image, then point to the little Cooliris icon that appears next to it. In a second or two you’ll see a pop-up window containing the page, image, or even video. This isn’t just a screenshot, however you can actually play the video or interact with the page, clicking links, filling out forms, etc.
Best. Extension. Ever? It might just be. Cooliris changes the way you interact with the Web, and for the better. Cooliris Previews 2.0 is free for Internet Explorer, Firefox, and Safari browsers.
Get Cooliris for firefox here. I’m having fun with it.