Empty formData on IE10/11/Edge jQuery

Hello I have such code which works great on every browsers except Internet Explorer 10/11 and Edge.

$(this).on('submit', '.modal-form', function(event) {
    var $form = $(this);
    var $target = $($form.attr('data-target'));
    var $formData = new FormData(this);

    if(event.handled !== true) {
        $.ajax({
            headers: {'X-CSRF-TOKEN': $(this).find('input[name=_token]').val() },
            type: $form.attr('method'),
            url: $form.attr('action'),
            data: $formData,
            processData: false,
            contentType: false,

          success: function(data, status) {
                console.log("success");
          }
        });
        event.handled = true;
    }
    event.preventDefault();
});

I'm using it to post forms in ajax modal windows on my systems. But on Microsoft browsers formData is empty. On server side all inputs are missing. I'm using jQuery 1.11.3