cannot login to yahoo or myyahoo when sanboxed

if I run firefox sandboxed the login for yahoo mail and myyahoo always fails with invalid username password. outside the sandbox all is fine. how do I correct this behavior?

Is there a way to choose weather or not to use the sandbox on a browser start? right clicking the short cut shows I can, it it still opens in the sandbox. I would like to choose at times because of what I have just experienced above.

thanks

nobody else having this problem??

I’m also finding a lot of links just boomerang back.