I have had this problem for many years now. When I complete a customer journey on some sites, usually with a payment involved, the final submit button doesn't work at all, and I have to redo the transaction on Chrome. This happened yesterday on Ryanair's site and, by the time I gave up and redid the journey on Chrome, certain prices went up. So, now I'm losing money :-( Firefox has been my default browser for a decade or more, despite my husband's teasing me about this issue, but I might have to give up and make the switch to Chrome or Edge. Please help! Please note that Firefox clears my cookies every time I close my browser. Thanks!