You can change the order of the tabs simply by clicking on one and dragging it across the others. Look for a blue icon that shows which two tabs the chosen window will be moved between. You can use this to move a tab into its own window, too. Click and drag the tab off of the browser window or to the far side of your screen and the selected tab will now display in its own window. Conversely, if you find yourself working in too many windows, you can drag tabs from other open browser windows onto an existing window to create a new tab. Good news for you Chrome and Safari users — this tip will work for you as well!