What browser is this feature in...?

I remember reading recently about a browser that has a function where you right-click or shift-click or something on a link and it will show you a little thumbnail of the page without you actually having to go to the page to view it. Helpful for scanning search results without having to check out each page individually...

I can't seem to find which browser contains this functionality though. Does this sound familiar to anyone? Can someone please point me in the right direction to find this...

Thanks!