As you are using Windows 7 the most current Firefox version you can run is Firefox 115 ESR currently at 115.30.0esr. https://support.mozilla.org/en-US/kb/firefox-users-windows-7-8-and-81-moving-extended-support You can try to change your Firefox version number to fool the bank site. # In a new tab, type or paste '''about:config''' (with a colon) in the location (address) bar and press Enter/Return. Click the button accepting the risk. # In the search box in the page, type or paste forceVersion and pause while the list is filtered # Double-click the ''network.http.useragent.forceVersion'' preference to display an editing field, and change the value to '''128''' or '''140''' then press Enter/Return or click the blue check mark button to save the change.