firefox/testing/web-platform/meta/custom-elements/upgrading/upgrade-custom-element-error-event.html.ini

[upgrade-custom-element-error-event.html]
  expected: ERROR
  [autonomous: exception thrown in constructor is reported to definition's global]
    expected: FAIL

  [autonomous: exception thrown by spec due to invalid element state is reported to definition's global]
    expected: FAIL

  [customized built-in: exception thrown in constructor is reported to definition's global]
    expected: FAIL

  [customized built-in: exception thrown by spec due to not returning the same value is reported to definition's global]
    expected: FAIL