wjack2010: my fie fox will not let me get into mt E-mail

my browser is fire fox. When I click on firefox at takes me to msn which has mr e-mail account . i log in and this is what come up. to sign in to window live account tey upgrading your browser. if yore account is microsoft internet explorer, install the lasted version of the browser. I seen to have trouble down load firefox . What do i need to do?? Can not get on my e-mail to read. Help