It's in Opera, Chrome, Safari, and Internet Explorer. Firefox doesn't have the new tab Speed Dial feature by default, but add-ons can help you out. Here are four that will give you Speed Dial powers.

Group speed dial for Firefox isn’t an ordinary speed dial function but allows users to keep the most important internet pages at their fingertips. The goal of this extension is to provide quick, ...

Firefox only: Speed Dial corrals your favorite sites into a thumbnail-preview tab for fast and easy browsing. If the name sounds familiar, it's because Opera recently unveiled an eponymous feature. If ...