You appear to be running macOS 10.13 so the most current you can run is Firefox 115 ESR currently at Fx 115.30.0esr. Firefox 116.0 to current requires macOS 10.15 (ten.fifteen) or later. https://support.mozilla.org/en-US/kb/firefox-users-macos-1012-1013-1014-moving-to-extended-support You can try to change your Firefox version number to fool the Chase bank site as they are looking for Firefox 129.0 and newer.. # 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.