There is an ongoing ambiguity in UX design regarding tray icons.
As applications move to the web, the definition of "background process" changes. PWAs can now register tray icons, blurring the line between a website and a native utility. This allows a website for email or music to run in the background, receiving notifications just like a native Windows app. what is tray icon
To control which icons always show:
Tray icons serve several purposes:
It sits on the far right side of the main bottom taskbar, directly next to the system clock. There is an ongoing ambiguity in UX design