Start menu and "running" application instances?

[Kristian Rink]

Folks;

coming from GNOME and playing with KDE neon, I feel mostly home here 
right now except for one thing I didn't manage to set up myself: Is 
there a way to, in the applications start menu when searching for 
Firefox or Konsole, not start a new instance / window of the application 
but rather bring a running instance (if there is one) to front?

Thanks in advance and all the best,
Kristian