Code-Snippets-Functions/Execute a function on a child site/WooCommerce/disable-autocomplete-checkout-billing.txt

add_filter( 'woocommerce_form_field', 'change_autofill', 1, 1 );

function change_autofill( $field) {

$agent = $_SERVER['HTTP_USER_AGENT'];

if (strpos($agent, 'Firefox') !== false) {
    $field = str_replace('autocomplete="address-line1"', 'autocomplete="off"', $field);
    return $field;
}   
else {
    $field = str_replace('autocomplete="address-line1"', 'autocomplete="none"', $field);
    return $field;
}      
}