Credit card auto-filling seems blocked

Hi.

1. Have you updated Fx and what OS are you using?

2. If may be that the memory of the sites you visit is overloaded/dead/dated etc. like what happens to cookies sometimes You could try and delete the saved info etc. and start afresh. You could even create a new profile so as not to loose all the settings you have and just see if a new profile works.

https://support.mozilla.org/en-US/kb/credit-card-autofill

See this question:

• /questions/1555241 payment method - Save and autofill payment info

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.)

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.)

Thanks, not OP but I also have had this issue for a few months.

I tested the above Mozilla forms and same pattern:

1. Click the Field and it shows all my cards 2. Select a Card 3. Briefly my information shows in the fields then quickly disappears.

I completely disabled all extensions for this test.

My info: FF 152.0.1 (64-bit) Installed via snap Ubuntu 26.04 LTS

Actually this worked for me to edit each card number: https://support.mozilla.org/en-US/questions/1566794#answer-1832599