gnome-shell-extension-topicons-redux 6 Display legacy tray icons in the GNOME Shell top panel
Many applications, such as chat clients, downloaders, and some media players, are meant to run long-term in the background even after you close their window. These applications remain accessible by adding an icon to the GNOME Shell Legacy Tray. However, the Legacy Tray was removed in GNOME 3.26. TopIcons Redux brings those icons back into the top panel so that it's easier to keep track of applications running in the background.