This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Where or how can I find the complete command line options for starting firefox?

  • 2 replies
  • 4 have this problem
  • 1 view
  • Last reply by Venemovil

more options

I would like to have 2 different profiles to start Firefox. I suppose I can do that through the command line, but I failed to find the command line options in the support web site. I work on Windows XP...

Thank you.

I would like to have 2 different profiles to start Firefox. I suppose I can do that through the command line, but I failed to find the command line options in the support web site. I work on Windows XP... Thank you.

All Replies (2)

more options
more options

Hi Fcousin.

* If Firefox is open, close it completely by choosing "File -> Exit".
 * Go to the Windows Start Menu (bottom left button) and then select 'Run'. On Windows 7 or Vista, press "windows key+R" 
   * Enter (without quotation marks) "firefox -P" (i.e. firefox space hyphen P ) then click OK  

I found this useful information at http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows