Hi Firefox for Android does not have an ESR version, and Firefox 24 is over three years old. You should be able to use the site using the latest version of Firefox for Android available for your device from Google Play. If not, please post a link here to the site you are trying to view (please '''do not''' provide your log in credentials). I hope this helps, but of not, please come back here and we can look into a different solution for you.