It is not currently possible to have two different TPAM browser sessions open in different tabs. Changing from one interface to another with different credentials requires shutting down and starting up the browser session.
The same TPAM session credentials will be used for all the open tabs or windows of the same browser to the same TPAM device.
To have different sessions open at the same time, use the Profile functionality of Firefox.
1. Start the profile manager as above by typing "firefox -profile" in the Run box,
2. Add the profiles PAR, PARAdmin and PARManager
3. Create a new shortcut on your desktop, or wherever you like, call it PAR, and make it point to "C:\Program Files\Mozilla Firefox\firefox.exe" -p PAR -no-remote
4. Do the same with your other two profiles, using -p PARAdmin and -p PARManager .
Each of these is independent, with different homepages and environments that can be set when you first start them up, so they can all be open at the same time. You should start a default profile Firefox session first if you want to use it for regular browsing in dependant of the PAR ones.