forcing yahoo to open in the old screen

                                                                                  the new view with the email control tabs to the left and not all show is the right shreen shot or bottom screen shot

i have been using the old yahoo for years and now it seems they changed the layout to resemble google. it sucks. if i wanted googles layout i would use my google email. if i use this term https://mail.yahoo.com/d/settings/1 i get the old yahoo setup screen and then i have to click return to mail and the old screen stays until i either restart the pc or restart fire fox. i do not see in fire fox setting an area that lets me put in a startup term like chrome has that will restart yahoo in the view i like. being that view is still there. the old view that i like with the blue on both sides the new view with the email control tabs to the left and not all show is the right shreen shot or bottom screen shot