google images, search for "pyro team fortress 2"
CoolPreviews, formerly known as Cooliris Previews, is a web browser plugin for Mozilla Firefox, Internet Explorer, Safari, and Flock that opens a preview of the underlying content of a web link when the mouse hovers over the link. The stated goal of the software is to optimize browsing by allowing review of multiple links while preserving the context of the originating page. For example, one could preview a list of news headlines before deciding which article to read in depth.
Cooliris, formerly known as PicLens, is a web browser plugin that provides interactive full-screen slideshows of online images. The plugin is available for Safari, Firefox, and Internet Explorer. At present, the software is compatible with Google Images, Yahoo Images, Ask.com Images, deviantART, Flickr, Facebook, Live Image Search, Photobucket, SmugMug, Fotki, YouTube (for videos), and any web site that implements mediaRSS tags in their HTML pages. The software places a small icon in the corner of an image thumbnail when the mouse moves over it, which launches into a full-screen photo viewer when clicked, but without giving an option to save any of the pictures shown. - wikipedia