In Firefox, you can apply Themes to change the look and feel of your browser. I use Noia. I don't really care about the skin itself, though it is nice. The main thing that I look for is that the right side scroll bar touches the side of the desktop. This means that you can just slam your mouse up against the side of the browser and you will be able to click and scroll. A lot of themes that are out there (including the Firefox default) have a one or two pixel border on the side so you actually have to aim a little when you are trying to scroll. This doesn't make sense to me since you have to be that much more accurate with your mouse for a task that really doesn't reuire it.