AT&T Uverse (ISP & TV) e-mail address (Yahoo) .att.net is overriding my bookmark for my personal yahoo.com email access as well as a new home page.
Recently, AT&T started requiring a login to access the Uverse TV schedule. You had to use the forced AT&T account e-mail powered by Yahoo and ending in .att.net.
I have my personal Yahoo e-mail account bookmarked and it has worked great for years. Now, if I login in to see the TV schedule, whether I logout or not, if I click on the bookmark for my Yahoo Plus e-mail account, it goes to the att.net account which I do not use, ever except for required logins.
If I log out of that account, it defaults to the AT&T default Yahoo home page. Even if I close that window any attempt to access is my own account is forced to the att.net account. The only way to access my own account is to then go back to my chosen home page and then the bookmark will work once again. However, I have to login every time which is a pain in the neck.
Even if my Yahoo account is open in one window and the Uverse was open in another, going back to the first window again defaults to the att.net account.
Opaite Mbohovái (1)
Sounds like a cookies issue. Firefox allows one login per domain for all windows or tabs that are open. Firefox automatically switches other windows / tabs to the latest login.
Use one of these extensions to get around that limitation.
Multifox extension:
http://br.mozdev.org/multifox/
Cookie Swap extension:
https://addons.mozilla.org/firefox/3255/
Cookie Pie extension:
http://www.nektra.com/oss/firefox/extensions/cookiepie/