credit card autofill not working

Do you recall if this is only happening on one specific site, or affects different forms on different sites? Did this work for you at some point in past, potentially even on the current site, and seems like a recent change, or you don't remember ever being able to use the feature? You can try autofilling some of Mozilla's testing forms to see if at least these work as expected. If you open https://mozilla.github.io/form-fill-examples/ there's several variants in the top "Forms" section — if you click through the links, some will have credit card fields to test. This is just a dead form that will not pay for anything or send the data anywhere — it's only for Mozilla testing to see how different types of forms handle the autofill input. It also includes some very simple forms to verify your autofill even works on these. Basically all of that is used in Firefox testing, so these are believed to be working with your credentials — if not, there's something off, because these "should just work". These forms are safe and do not send your data anywhere, everything stays just in your browser, there's no "server" component that would be able to listen, these fields are statically served and only used for heuristics and testing. (If you don't feel like autofilling your real card, you can add a "4242424242424242" Visa with any future expiration to your payment methods for testing.)