I use proxychains utility with firefox. I want to start the firefox profile twice, but with other proxychains parameters. But I can't, when I try to run the second instance of firefox with the same profile, it's just opens a new window of exiting session. I have tried this commands: firefox -P profile %u, firefox -P profile --new-instance, firefox -P profile --no-remote, firefox -P profile --new-window. Nothing worked. Hope for your help!

  • You cannot. Firefox will not start another instance with the same profile. Mar 5, 2021 at 0:28

1 Answer 1


Are you trying to have separate cookie sessions? If so checkout the multi-account container. It is an add-on

  1. Go to Firefox menu -> Add-ons.
  2. Search for "Firefox Multi-Account Containers"
  3. Add to Firefox

It looks like below.

enter image description here

Link: https://addons.mozilla.org/en-US/firefox/addon/multi-account-containers/

  • Thanks, but no. I want to run firefox profile with different proxies using proxychains linux utility. It means that I need to run new firefox process, but not only new window.
    – mooko
    Mar 5, 2021 at 12:43

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .