Do you mean the pair of buttons with icons that look like a star next to a clipboard? To rearrange, add, and remove toolbar buttons, check out Firefox's Customize feature. More info in this article: [[Customize Firefox controls, buttons and toolbars]] Once the Customize tab opens, you should see numerous available buttons you can drag up and drop to your preferred location. Can you get the missing one(s) back? If they are nowhere to be found, try the "Restore Defaults" button at the bottom center of the Customize tab. Success?