Using applicationize to create chrome apps.
Drop your extension in chrome://extensions
An example of a .desktop file:
Name=Netflix Chrome (Application).
If you are using Gnome...
Go to "Extensions".
Look down the list for "Launch new instance".
Set it to "ON".
This affects more than the gnome-terminal window but I also find the behaviour of returning to the same terminal window extremely annoying.
An alternative is to hit the context menu button in the currently open terminal window and hit "T" (or just "...