When I mount a USB/Phone and select the "Open with File Manager" action, DN always opens a new instance of Dolphin, even if there is already a Dolphin instance running. Reproducible: Always Steps to Reproduce: 1. Open Dolphin 2. Plug a USB 3. In the device notifier popup select 'Open with file manager'. Actual Results: The device manager opens a new Dolphin instance. Expected Results: The device manager should use the running instance of Dolphin and either open the USB as a new tab (preferable) or replace Dolphin's active tab contents.
Whenever you click a folder from outside Dolphin a new window is spawned, I don't see why this particular case should be treated differently.