I don't even know if this is the right forum since I don't know if it is a browser issue, or something else. I want to log into a supermarket website using two different "loyalty" accounts on separate browsers. This way, when I want to load coupons onto one account, I just open the one browser, and for the other, I open another browser. But no matter what I do, this website does not allow it. If I log into Account 1 on, say, Chrome, and then open Firefox and log into Account 2, then, if I go BACK to Chrome, it will be logged into Account 2. Even though I have NEVER logged into Account 2 on Chrome, so Chrome doesn't have any login credentials for account 2 stored in its cookies at all. It will even do this if I login to one account on my computer and then the other account on my phone. Does this suggest it is a router thing? And if so, is there some setting that I don't know about, or has Hannaford supermarkets just figured out some weird way to force something that literally no other website in the history of the internet has done?