I-Firefox Isithangami Sokwesekwa

I use Mozilla Thunderbird for my e-mail manager. I have AOL and Yahoo mail accounts that I manage via Thunderbird. The new security requirements from Yahoo and AOL require me to remove my e-mail accounts from Thunderbird and add them back into Thunderbird. After I add the accounts to Thunderbird, the system then has me login to the Yahoo mail account. I am getting an error message that says my browser (in my case, Firefox) is not allowing cookies. I have changed all of the Privacy and Security settings that should allow cookies (according to Mozilla Help) and am still unsuccessful. I am at a loss on what I am supposed to do to allow cookies.