What file browser?
What operating system?
What desktop environment?
Clementine adds a duplicate on whatever playlist I have open if I double click on a song in my file browser [KDE/Dolphin] :D
Access your music library through Clem, using the library or files tab for best results
I have a keyboard shortcuts for play/pause & next song using keys close to the touchpad on my laptop
I can hover over my system tray for information or turn on "pretty osd" Tools>Preferences>Notifications
The Clem popup is easy to position in an out of the way place