Cannot Log In Using Mozilla Firefox

I am able to log in using Internet Explorer, but I cannot log in with the Mozilla Firefox. I have tried to delete cookies and also to re-register under a different email address with Firefox and it keeps on returning back to Guest after it says…you have successfully logged in. Please look into this. Thanks in advance.
Answer #1
Have you reinstalled it? Or you could try Chrome
Answer #2
Make sure its set to No Proxy
If you are connected through a proxy, then that’s the problem. Yahoo runs some type of authentication before you can log in.
Answer #3
Yes I have uninstalled Mozila Firefox and reinstalled it again, also I have it set to no proxy. I have not used Chrome yet to log on this site as of yet.
Answer #4
Have you changed your login address to https rather than the old http?
Answer #5
Try the Support link at the top of the board – see if the staff can help.
&EDIT – maybe broken, pm an Elite mod
Answer #6
It has to be related to the way you are connecting
https://www..org
should do it, if not click History tab (top left), select clear recent history and select what to clear (I use Waterfox 64Bit, which is Firfeox based).
Answer #7
Yes I use https:// for both Internet Explorer and Mozilla Firefox. I have also clicked on History on Firefox and cleared all, but it still does not let me log in and makes me a guest again. Would it help me to use what you use the 64 bit Firefox? I will try to PM an Elite Mod to find out what is happening. Thanks in advance.
Answer #8
Try restarting Firefox in safe mode with the extensions disabled.
Answer #9
check your date.