Making new firefox profile for other facebook account

Wanna play facebook game in firefox with multiple account cause you would using greasemonkey on all your game.

First step, right click on icon point to properties and add string "-no-remote -p" without " sign

 

After edited the target link and save "ok", just left click or open icon

Just create the profile and gotcha you have another firefox profile, an you can open facebook account in every profile