Found in

• Nightly 129.0a1

Affected versions

• Nightly 129.0a1

Tested platforms

• Affected platforms: Windows 10

Preconditions

• Install the Firefox en-US build
• set following prefs:
  extensions.formautofill.creditCards.supported = on
  browser.search.region = CH
• Use CH VPN to test
• Have at least one CC saved in about:preferences#privacy

Steps to reproduce

1. Log into https://www.brack.ch/ as guest, add an item to cart and navigate to checkout page
2. Use the autofill, preview and clear form within the CC form

Expected result

• Autofill, preview and clear form options in the CC form are working as expected.

Actual result

• Expiry year is not previewed, autofilled or stored
• There is no "Clear autofill form" option available
• The fields are not highlighted when autofilled

Regression range

• N/A

Additional notes

• There is no CC doorhanger in Google Chrome, otherwise most of these issues, except the Expiry Year not being previewed or autofilled, can be reproduced there too.
• Fathom Fox