NS_ERROR_NOT_AVAILABLE: prompt aborted by user, nsPrompter.js:426

NS_ERROR_NOT_AVAILABLE: prompt aborted by user, nsPrompter.js:426

Im getting this error in Firefox i googled it but i didnt get exact solution.

I think the error is in this piece of code

CODE:-

$(window).load(function(){
if(localStorage.getItem('verify')=='\1'){
if(localStorage.getItem('claim') == '\0'){
if(localStorage.getItem('delete') == '\0'){
$.post("sample.php",{RegID:localStorage.getItem('Id'),Token:localStorage.getItem('token')},function(data){
$('.name>p').html(data.Name);
$('.rate_div>p').html(data.Rate);
$('.cover').css('background-image', 'url('+ data.Pic+')');
},'json');
}
}
});