OK so this is straight from Firefox but I LOVE this feature. Really it's a lazy person's feature and only keeps you from hitting three keys (ctrl + f + enter) but the more you do it the more keys you have to hit. Basically I'd like to start typing while at a web page and have the text I'm typing show up on the screen as highlighted (if it finds what I'm typing) like Firefox does. They call it "Search for text when I start typing". Great product!