Javascript Facebook无限循环登录

这种身份验证对我和我公司的大多数其他人都有效，除了一个人，它会导致一个内网循环

登录弹出窗口显示时间很短（他已通过身份验证）。然后弹出窗口消失，站点刷新并从头开始

我用IE、Firefox和Chrome进行了测试，没有问题。他正在用Firefox尝试

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有人能帮我吗？

用户可能禁用了cookies。

真实情况。。我应该考虑一下。^^这与PHP无关，是Javascript！我正在将登录数据返回到php。但是我删除了标签，因为它与这个问题无关。

 var login = false;
 FB.getLoginStatus(function(response) {
          if (response.status === 'connected') {
              console.log('connected');
              login=true;
                // the user is logged in and connected to your
                // app, and response.authResponse supplies
                // the user's ID, a valid access token, a signed
                // request, and the time the access token 
                // and signed request each expire
                var uid = response.authResponse.userID;
                var accessToken = response.authResponse.accessToken;
          }
          else{
              FB.login(function(response) {
               if (response.authResponse) {
                 console.log('Welcome!  Fetching your information.... ');
                 FB.api('/me', function(response) {
                   console.log('Good to see you, ' + response.name + '.');
                   if(login===false)
                   {
                       window.open("http://www.facebook.com/EnergyZuerich/app_332399760133904", "_top");
                   }
                   //window.location.href=window.location.href;
                   //FB.logout(function(response) {
                     //console.log('Logged out.');
                   //});
                 });
               } else {
                 console.log('User cancelled login or did not fully authorize.');
               }    
             }, {scope: 'email'});
          }});