Image not uploading 2nd time - Something went wrong

Question

We are Providing product personalization feature [ users can upload image from product view page & buy the product].

here user can upload any number of images by clicking upload image button here

1) click upload image button = > click +Upload new image in pop up = > upload image from local system = > click on "Add Image" , than again if we try same steps, we will get an errors as below , means 1st time its working fine, but 2nd time show error.

But only in Mozilla Firefox 2nd time also its working fine.

AjaxController.php

public function addImageAction()
    {
        $response = array();
        if(isset($_FILES['new_image']['name']) && (file_exists($_FILES['new_image']['tmp_name']))) {
            $uploader = $this->setUpUploader();
            $path = Mage::getBaseDir('media') . DS . 'custom_product_preview' . DS . 'quote' . DS;
            try 
            {
                $uploader->save($path, preg_replace('/[^A-Za-z\d\.]/','_',$_FILES['new_image']['name']));
                $filename = $uploader->getUploadedFileName();

                $filename = $this->_convertToImg($filename);

                if(getimagesize($path.$filename)!==false)
                {
                    $response['src'] = Mage::getBaseUrl(Mage_Core_Model_Store::URL_TYPE_MEDIA).'custom_product_preview/quote/'.$filename;
                    $response['error'] = 0;
                }
                else
                {
                    $response['error'] = Mage::helper('aitcg')->__('Image file is empty or corrupt');
                }
            }
            catch (Exception $e)
            {
                $response['error'] = $e->getMessage();
            }

        }
        else
        {
            $response['error'] = Mage::helper('aitcg')->__('Something went wrong. Please try again.');
        }

        $this->_setBodyJson($response); 
    }

System.log

Edit : seems above system.log error is not related to this issue

edit 2 : console

Edit 3

loaded : function(id) {
        var d, 
            i = $(id);
        if (i && i.contentDocument) {
            d = i.contentDocument;
        } else if (i && i.contentWindow) {
            d = i.contentWindow.document;
        } else {
            d = window.frames[id].document;
        }


        with($(this.file_id)) {
            disabled = false;
            value = "";
        }

        if (typeof(i.onComplete) == 'function') {
            eval('var el = ' + d.body.innerHTML + ';');
            i.onComplete( el );
            element = document.getElementById(id).parentNode;
            element.parentNode.removeChild(element);

        }
    }

Answer 1

adding below code to JS solved the issue....

if (d.location.href == "about:blank") {
            $(d).remove();
            return;
        }