MRSA 101
Geminai Mistario
Well, has your password changed at all? If you have an automatic login to your account, you should check to see that your registered email is still the same, and possibly reset your password. If it's still doing it between both your browsers, you may need to check your settings and make sure a 'saved passwords' feature isn't conflicting with you on the marketplace.
i log in manually never save my password
Make sure you are entering it correctly. Sometimes you may think you are putting it in correctly but there may be something off. If you want to be sure, write it in a word document to make sure it is right and then copy and paste it to the login are to be sure it is working