MS TSE multiple sessions with only one user

Hi,

I use a windows Terminal Server, with one user but multiple separates sessions allowed.
I use firefox with one profile whith all informations necessary for this user.
If i launch firefox under more than one session it is not possible because i only have one profile. Profile is locked after the first software start.

I would like to be able to use only one profile, For your information regarding terminal server each session used the same environment but different instance. A workaround should be to auto export and replicate this profile to each sessions but i don't know if it is possible and where to store these informations.

Thanks in advance,
Sylvain.