open firefox from bash shells script in other desktop in ubuntu 12.10 (pear os 7)

Question

So I have figured out how to open Firefox from Bash. It's pretty easy.

However, I would like it to open in my 2nd desktop, not the one I'm using. So it doesn't bother my primary desktop. How do I specify which desktop Firefox will open in?

I'm running Pear OS 7 which is basically Ubuntu 12.10.

Also is there a way to open Firefox without the GUI in the background?

Thanks ahead of time!