Welcome, I am Cory. Thank you for asking your question today.
Who is the banking website you are using?
May I connect remotely and fix this for you?
What browser are you on?
Please press CTRL+D to bookmark the page.
Press CTL+SHIFT+Delete to open History
Time range to clear: Everything
Check all of the boxes
Click Clear Now
Close all of Firefox
Open Firefox and let me know if it is working again.
Did you close everything and open it again?
Yes, you have to go to the link on the computer
Please download Google Chrome and install then try to sign in to your bank: https://www.google.com/chrome/browser/desktop/
Do you still need help?