Can i run a firefox entry with specific arguments ?

Hi,

I have web interface of VCENTER that i need to run in firefox but with different profile, on my desktop the shortcut i use is :

"C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -P "1 Proxy"

In RDM if i add a web page entry it just runs the firefox. Can i somehow pass the arguments needed ?

many thanks
Vassilis