var provider = new firebase.auth.FacebookAuthProvider();
$scope.LoginFacebook = function(){
    console.log(provider);
    firebase.auth().signInWithPopup(provider).then(function(result) {
        console.log(result);
        console.log(provider);
      // This gives you a Facebook Access Token. You can use it to access the Facebook API.
      var token = result.credential.accessToken;
      // The signed-in user info.
      var user = result.user;
      // ...
    }).catch(function(error) {
      // Handle Errors here.
      var errorCode = error.code;
      var errorMessage = error.message;
      // The email of the user's account used.
      var email = error.email;
      // The firebase.auth.AuthCredential type that was used.
      var credential = error.credential;
      // ...
    });
};