The only one I use is a system tray because some applications, like Steam, stick an icon in it to manage them. When you have an application upgrade in the back

The only one I use is a system tray because some applications, like Steam, stick an icon in it to manage them. When you have an application upgrade in the background, you can no longer access by launching the icon since it doesn't relate to the running application anymore. If it's not a laptop that would have Steam then I don't need any extensions either.