Hi, we don't provide 128 for macOS 10.13, you need at least macOS 10.15. If you cannot update your macOS to 10.15, then you can try to change your Firefox version number to fool the Chase bank website as they are looking for Firefox 128.0 and later. # In a new tab, type or paste '''about:config''' in the 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. # Confirm here that it's working.