click on the Firefox tab, Options.
You will see Content, Privacy, Security.
These have Exceptions button, to Allow or Block web sties, that you Enter.
Two of the three have "Exceptions..." buttons, but these have nothing to do with blocking web sites.
I don't know what your complaint is.
I just signed in to the Hotmail.com/Outlook page, looked at an e-mail, then simply clicked the browser window Closed.
There was no pop-ups or redirects.
The trouble is I have more than one Hotmail (or whatever you'd like to call it) account. Before it was easy to switch between them with the click of a button, however someone at Microsoft decided that this method was no longer secure, and now every time you want to switch to another account, you have to sign-out and sign-in again. However, when I sign-out, I'm automatically redirected to the ninemsn news page! I have to then have to manually go to hotmail.com to sign-in again (to my other account).
Okay, I understand that switching accounts as before had security risks, but now forcing me to the ninemsn news page? I find that ridiculous.
And of course, if you click on the Hotmail button on the ninemsn page, it has to track you some how.
I've been switching between them nearly up to ten times per hour and it's getting annoying.
I suggest you don't used Tab browsing.
I've been using tabs since they existed (back in 2001, with Mozilla)!
I think I've found the solution. Use Firefox for my work Hotmail, and IE for my personal email (to have access to both at the same time). If only Firefox allowed two separate independent instances of itself...