I m trying to do following with c# code.

1) Open Firefox Browser --->Tools--->Options--->In General Tab--->Downloads--->Always ask me where to save file.

I want to do this whole process in my application with c# code. I want that when download window opens , the radio button in "Always ask me where to save file" option gets checked automatically.
 I got the code from this site ..but that works only when firefox in not running. I m using the code in application and running that application in Firefox browser.
I have tried from various links , but all is in vain. Any help will be greatly rewarded. Thanxxx in advance..!!