Steps to replicate the issue and screenshots please. Try downloading Firefox from Mozilla, run it from the folder and see if you have the same issue. https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

@jonzn4SUSE,

Thanks for your reply.

I cleared the cache. Doing this logged me out of other websites I was using, but it also cleared up the issue.

Thanks again.

Note that this is usually a problem with the cookies and clearing the cookies for this website via the padlock should fix this.