Optional ReadonlydomainOptional ReadonlynewThe new value of the changed preference.
Can be undefined for multiple reasons:
undefined, use the preference service to determine the effective new value if needed.Optional ReadonlyoldThe old value of the changed preference.
ReadonlypreferenceThe name of the changed preference.
ReadonlyscopeThe PreferenceScope of the changed preference.
URIs of the scopes in which this change applies.