This program works if you use FireFox with the GreaseMonkey add-on. Warning: Although this program should be perfectly safe, you should always be very careful running programs that run while you are on banking sites!
But, when paying bills, you're pretty much guaranteed bad credit if your memory isn't flawless and you do multiple things on the computer at the same time. That's because USAA's Web BillPay requires you to "confirm or cancel" bills after you enter all the information. I enter the bill into my checkbook before confirming (because when I click the 'confirm' button, I work on something else on the computer, to maximize my efficiency). That runs the risk of the page timing out, not leaving a reminder to confirm the transaction. USAA Customer Service recommends entering the information in your checkbook after you confirm the transaction, but by clicking the CONFIRM button first and going to another task, you run the risk of forgetting to record the transaction in your checkbook. Either way, you are guaranteed to either bounce a check or miss a bill payment if you get that timeout page and forget what you hadn't yet done. Either way can hurt your credit score.
I've forgotten to write the bill in my checkbook a few times, so I switched to recording it in the checkbook before hitting CONFIRM -- but now twice I haven't confirmed the transaction (or so USAA claims!). The second time, that hit me with a late fee and interest of about $70 (USAA covered the first $50, per my interpretation of their Terms and Conditions). They also revoked a promotional offer, and warned that if it happened again, my APR would skyrocket (not a big deal for me, since I pay the full amount every month, but still disconcerting!). You would *think* that if someone went to the trouble of entering all the information about a bill, and they decided against having the bill paid, they wouldn't just let the page time out. Especially for "E-bills" where USAA knows the amount due and the due date, and knows that if the payment doesn't get there on time, there will be late fees.
If you use the USAA website, you've likely many times seen the timeout page and say to yourself "Gee, something at USAA timed out -- I hope it wasn't important!" It isn't always USAA BillPay; perhaps you are considering getting life insurance, go to the life insurance page, and leave it there as a reminder that you need to get life insurance (isn't that what open tabs are for in web browsers?). But a few days later, you go back, and see a timeout page, with no recollection of what had been there. Poof, you forget all about getting life insurance.
So, using USAA Web BillPay it is impossible to avoid potential credit issues unless your memory is excellent (actually, it has to be perfect).
I do think that USAA is a wonderful organization. I've had the occasional problem with them, but like most members, I find that overall they do an excellent job. That said, this is a nasty problem that USAA really, really has to fix. In about 15 years of using the web, I've never encountered another website with an issue like this. Worse, [1] They ask you to approve the transaction or cancel it, they assume that a timeout means that you want to cancel (which has never been the case with me), and [2] they refuse to honor their guarantee which *does* apply in this situation.
The addon listens for any requests to change the current webpage to the webpage that USAA redirects to when a timeout occurs. If such a request is made, it simply cancels the request. This works out better than the old way, as the addon doesn't even know that you are on the USAA website.
The addon does a couple other things, too. It also adds a red warning box to the USAA page that timed out, so you won't be tempted to take an action after you've been logged out (USAA will just direct you to a login page if you do). It also generates a pop-up box, which will get your attention if you are doing something else on the computer. Finally, it will generate a logfile entry on the USAA servers, so they will know that a timeout occurred (rather than you simply closing the window).
I tried a number of other options; the most elegant (stopping the META REFRESH) doesn't seem possible via JavaScript, and you can't add a note to the timeout page telling you the page you had just been on (since the URL doesn't distinguish between entering bill information versus confirming it).