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I am logged to some user account on windows seven. I have Firefox running. I would like to run one more instance, but as another user. This doesn't work. Why?

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up vote 3 down vote accepted

You have to use multiple FireFox profiles and then launch FF from a command line (or shortcuts) with:

firefox.exe -p <PROFILE> -no-remote

More info is available here.

You can (also) use this in combination with Windows' RunAs to get multiple instances actually running as different users.

Hope that helps.

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