Firefox is jazzing things up with a couple of new test features that should embolden multitaskers and those who like to tinker with aesthetics. Side View lets you view a pair of tabs side-by-side without needing to open a new browser window. Once you click the Side View button on your toolbar, you can pick which tab you want to see on the side. It can be one you already have open or a tab you recently closed. You can open a browser link in the sidebar too. The two tabs are displayed in a mobile view by default to maximize your screen real estate, and you can drag the divider to make one tab larger than the other.