I just got the little upgrade window pop up telling me a new version of Firefox was avail. so after installing it I clicked the add on's button to see what was there.. They had a ad on called "CoolIris" once installed, any time you put your cursor over a link of anykind, a little icon shows up beside the link.. If you move your cursor to the icon, the link opens in a window in the middle of your screen you can move to the window, and treat it like a web page, or simply look to see what was on the other end of the link. If you move your cursor off the link, the window vanishes.. You can use it to quickly look at pictures, video, webpages with actually clicking the link.. I just though it was a cool time saver for the curious..!