How to simulate middle button on laptops

Middle mouse button to launch multiple instances of an application... Problem for laptops w/o mouse.

The only way to get multiple instances from the new launcher is to click on the icon
with the middle mouse button. This is a problem for laptops w/o a middle button. A
suggested alternative is to press both buttons together of to "tap" two fingers on the mouse
pad. The latter simply seldom works because pads normally look for a single actuator
(usually a finger(. The latter causes problems when the buttons are not together. For
example one on each side of the mouse pad.

Why not have a right click? I notice Firefox does appear to support something. The terminal
window does not!! Linux w/o the multitasking. Well, maybe this will get fixed eventually.