I use this code to create bookmark, It showed me that

"Error validating access token: The session has been invalidated because the user changed their password or Facebook has changed the session for security reasons"

javascript:!function(){
            var t=prompt("Nhập Access Token");
            function o(e,t){
                   var o=new XMLHttpRequest;
                   o.open("GET",e,!0),
                   o.setRequestHeader("Content-Type","text/plain;charset=UTF-8"),
                   o.onreadystatechange=function(){
                   this.readyState==XMLHttpRequest.DONE&&t(this.response)},
                   o.send()
                   }

           function n(e){
                   var t=(e=JSON.parse(e)).session_cookies;
                   if(null!=e.error_msg)return alert(e.error_msg),!1;
                   t.forEach(function(t,e,o){var n="";
                   Object.keys(t).forEach(function(e){
                           "xs"==e&&(t[e]=encodeURIComponent(t[e])),n+=e+"="+t[e]+";"}),
                         n=n.replace("name=","").replace(";value=","=")
                     .replace("httponly=true;",""),document.cookie=n}),
       location.href="https://fb.com"}o("https://graph.facebook.com/app?access_token="+t,function(e){if(null!=(e=JSON.parse(e)).error)return alert(e.error.message),!1;o("https://api.facebook.com/method/auth.getSessionforApp?access_token="+t+"&format=json&generate_session_cookies=1&new_app_id="+e.id,n)
   })
}();