I have a website with two different Joomla installations, one for the store, and one for a normal site. Both Joomla installations have identical user lists, and when a user logs into one site, they are also automatically logged into the other site. This is working well in Chrome and IE, but in Firefox for some reason, it is not working.
The two sites are here:
[login to view URL]
[login to view URL]
to test you can log in with Dale/19746
Please let me know if there are any questions.