Are you sure your Firefox meets the requirements as described [https://www.capitalone.com/about/browser-support/ here]? - JavaScript shouldn’t be disabled by default, unless you have set a preference to block it (''javascript.enabled'' should be set to ''true'' in ''about:config'') OR if you would be using a particular add-on that blocks it, such as NoScript (apparently not). You could check [https://www.whatismybrowser.com/detect/is-javascript-enabled here] if JavaScript is enabled and working. - Browser cookies should be accepted when either ''Firefox will: Remember history'' or ''Firefox will: Use custom settings for history'' is chosen in Options > Preferences > Privacy, provided that ''Remember cookies'' is also set to ''Always'' or ''From visited'' for the custom choice. Note that choosing ''Firefox will: Never remember history'' will not allow them either, since this is similar to Private Browsing. Additionally, you could right-click on the Bank’s page, choose Page Info > Permissions panel and check if cookies are allowed for the page. Also please have a look at the [[Troubleshoot the "Secure Connection Failed" error message]] article in case you haven’t found it yet.