This question already has an answer here:
I am using TorBrowser. However one of the websites I am connecting to seems to require that the exit IP address stay consistent across multiple requests. Is there a way to constrain torbrowser to use the same relay for a given domain(*.something.com). Part of the issue might be that the sub domains are changing between requests.
It's also possible there is some other issue with torbrowser and cookies that is unrelated.
Concretely what I observe is that the website works in a normal browser and I am able to login, but on torbrowser, I am sent back to the login screen.