Bugzilla

As requested by the engineering team, I've retested this in the latest Nightly 132.0a1 on Windows 10 x64.

* The Cardholder Name Target field is not cleared when using autofill in the Trigger Fields Card Number or Expiry Date.
* The Cardholder Name Target field is not being previewed when using autofill in the Trigger Fields Card Number or Expiry Date.
* The Cardholder Name Target field is not highlighted when using autofill in the Trigger Fields Card Number or Expiry Date.
* The Cardholder Name field is previewed, autofilled, and then cleared individually when using autofill in this Trigger Field.

The 'Name on Card' field is situated on the main page, and not inside an iframe, unlike the 'Card Number' and 'Expiry Date' fields(which are located within same-origin iframes).
When the extensions.formautofill.heuristics.autofillSameOriginWithTop setting is set to true, the issues no longer occur. Please find attached the Field Info section details from about:autofill.

As requested by the engineering team, I've retested this in the latest Nightly 132.0a1 on Windows 10 x64:
* The Cardholder Name field is not cleared when using autofill in the Card Number or Expiry Date fields.
* The Cardholder Name field is not being previewed when using autofill in the Card Number or Expiry Date fields.
* The Cardholder Name  field is not highlighted when using autofill in the Card Number or Expiry Date fields.
* The Cardholder Name field is previewed, autofilled, and then cleared individually when using autofill in this trigger Field.

The 'Name on Card' field is situated on the main page, and not inside an iframe, unlike the 'Card Number' and 'Expiry Date' fields(which are located within same-origin iframes).
When the extensions.formautofill.heuristics.autofillSameOriginWithTop setting is set to true, the issues no longer occur. Please find attached the Field Info section details from about:autofill.