In ST3 on linux/64 + KDE I’ve set

	~/.local/share/applications/mimeapps.list
		inode/directory=kde4-dolphin.desktop

If I do “Save As …”, the Dolphin file browser opens as I intend.

But, if I “Preferences -> Browse Packages”, the Dolphin file browser is NOT opened. Instead a GNOME (maybe GTK?) browser opens.

What setting do I need to set to make sure ALL file actions open Dolphin – not one of these others?

The open_dir command doesn’t look exposed, and there’s no way to easily override Main.sublime-menu, so your best bet is to create a key binding to open the Packages folder with some open_folder plugin on PackageControl.

Tbh I also think it’s a bummer.

EDIT: even better, create yourself a palette command.