As requested by the engineering team, I've retested this in the latest Nightly 132.0a1 on Windows 10 x64. * The Card Number field is not cleared out when triggering autofill from the Cardholder Name field The 'Name on Card' and 'Card Number' fields are situated on the main page, and not inside an iframe. Setting the pref extensions.formautofill.heuristics.autofillSameOriginWithTop to true doesn't resolve the issue. Please find attached the Field Info section details from about:autofill.
Bug 1903008 Comment 3 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
As requested by the engineering team, I've retested this in the latest Nightly 132.0a1 on Windows 10 x64: * The Card Number field is not cleared out when triggering autofill from the Cardholder Name field The 'Name on Card' and 'Card Number' fields are situated on the main page, and not inside an iframe. Setting the pref extensions.formautofill.heuristics.autofillSameOriginWithTop to true doesn't resolve the issue. Please find attached the Field Info section details from about:autofill.