unless ($screen{'firefox'}->compare($screen{'chrome'})) {
    my $diff_file = $screen{'firefox'}->difference($screen{'chrome'});
    print '#The images are not the same; see ' . $diff_file . ' for details'. "\n";
 
  `$diff_file`;


  unless ($screen{'internet explorer'}->compare($screen{'firefox'})) {
    my $diff_file = $screen{'internet explorer'}->difference($screen{'firefox'});
    print '#The images are not the same; see ' . $diff_file . ' for details'. "\n";
 
  `$diff_file`;

  unless ($screen{'chrome'}->compare($screen{'internet explorer'})) {
    my $diff_file = $screen{'chrome'}->difference($screen{'internet explorer'});
    print '#The images are not the same; see ' . $diff_file . ' for details'. "\n";
 
  `$diff_file`;