I am a Tor user. I logged into BitcoinTalk with Tor by choosing 'always stay logged in'. Then, by mistake, before I log out, I did a Tor restart for a new Tor identity. This killed the tab with BitcoinTalk session. Now, I have created another session to log in through Tor. When I'll log out from here, will I be logged out from the other session as well? If not, then how do I kill that session, on which I have lost control?
I think your question has been answered and maybe the problem is solved.
My experience is exactly the same as most people, when I logout from one of the two devices then all sessions on the other device are also logout. The same thing happens when I'm login via incognito tab, when I logout the other session also logout. TOR or any browser should also be the same, there is no difference.
But what is your problem, do you feel something is wrong or are you just asking because curiosity?