''locking as a duplicate - https://support.mozilla.com/en-US/questions/856290'' I use '''att.my.yahoo.com''' to access several e-mail accounts. Recently (perhaps about the time I upgraded to Firefox 5 or 5.0.1), I started having trouble after going to mail. I now get a different screen that says “A new look! We’ve improved the way you Sign-In to att.net.” That’s fine, but when I try to sign in, it tells me my password has expired and I need to change it. On another e-mail account, it can’t even find the account at all. When I try to go to “member center,” I have the same problems. One would think this might be an AT&T or Yahoo problem, but all is well when working in Safari or even Explorer. I have emptied Firefox cache and removed any cookies that seem to apply, but neither has helped. What else can be done to fix this?