Clear the cache and the cookies from sites that cause problems.

• "Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
• "Remove the Cookies" from sites causing problems: Tools > Options > Privacy > Cookies: "Show Cookies"

• Websites remembering you and automatically log you in is stored in a cookie.
• Create an allow cookie exception (Tools > Options > Privacy > Cookies: Exceptions) to keep such a cookie, especially for secure websites and if cookies expire when Firefox is closed.
• In Private Browsing - Use Firefox without saving history mode all cookies are session cookies that expire if that session is ended, so websites won't remember you.
• Do not use Delete browsing, search and download history on Firefox to clear the "Cookies" and the "Site Preferences"

Clearing "Site Preferences" clears all cookies, images, pop-up windows, software installation, and password exceptions.

See also:

• Cookies - Information that websites store on your computer
• Fix login issues on websites that require a username and password

Thank you for your response. I cleared my cache and my cookies and tried again with no success. I see that a cookie is being saved. But I still can't get in. Any help -- from anyone -- would be greatly appreciated. I have never had a problem with Firefox upgrades before, and I see that I'm not the only one with this problem.

Do you have an allow exception for your bank site?

• Tools > Options > Privacy > Cookies: "Exceptions"

You can see the permissions for the domain in the current tab in Tools > Page Info > Permissions

If the cookie settings in Firefox are OK then make sure that your security software (firewall) is blocking cookies.

Thank you. That seems to have worked to make the one website that was allowing me in but challenging me with my security question, no longer give the challenge. But the other websites are still not letting me in at all.

All this is only since I've upgraded FF. If anyone can help I would greatly appreciate it.