Firefox সহায়তা ফোরাম

I have always been able to connect with Navy Federal Credit Union for my banking until a few days ago. Every time I click on the accounts shortcut I get the FAILED TO CONNECT window. I can open my e-mail and ALL other websites. I can connect with Goggle but I've always preferred and used Firefox. I have used Firefox as my main browser for many many years. What is the problem??