But why do you need to disable the back button? The issue in question (not resubmitting a credit card payment) could better be handled by the website telling th

But why do you need to disable the back button? The issue in question (not resubmitting a credit card payment) could better be handled by the website telling the browser "Hey, this is a one time request". Hitting the back button then does not lead to that request being sent. I feel this is an issue where the heavy lifting should be done by website and browser devs, instead of breaking something the user expects.