firefox not hoisting ngActiveResource properly?

changed and working

angular.module('ActiveResource').provider('ARMixin', function () {
  this.$get = function () {

    return function (receiver, giver, excludeFunctions) {
    	function mixinProp() {
    	  if (!receiver.hasOwnProperty(i)) {
    	    (function () {
    	      var local;
    	      Object.defineProperty(receiver, i, {
    	        enumerable: true,
    	        get: function () {
    	          return local;
    	        },
    	        set: function (val) {
    	          local = val;
    	        }
    	      });
    	    }());
    	    receiver[i] = giver[i];
    	  }
    	}

      if (giver.constructor.name == 'Function') {
        giver = new giver();
      }
      for (var i in giver) {
        if (excludeFunctions) {
          if (typeof giver[i] !== 'function') {
            mixinProp();
          }
        } else {
          mixinProp();
        }
        // function mixinProp() {
        //   if (!receiver.hasOwnProperty(i)) {
        //     (function () {
        //       var local;
        //       Object.defineProperty(receiver, i, {
        //         enumerable: true,
        //         get: function () {
        //           return local;
        //         },
        //         set: function (val) {
        //           local = val;
        //         }
        //       });
        //     }());
        //     receiver[i] = giver[i];
        //   }
        // }
      }
      return receiver;
    };
  };
});

original and not working in firefox

angular.module('ActiveResource').provider('ARMixin', function () {
  this.$get = function () {

    return function (receiver, giver, excludeFunctions) {
      if (giver.constructor.name == 'Function') {
        giver = new giver();
      }
      for (var i in giver) {
        if (excludeFunctions) {
          if (typeof giver[i] !== 'function') {
            mixinProp();
          }
        } else {
          mixinProp();
        }
        function mixinProp() {
          if (!receiver.hasOwnProperty(i)) {
            (function () {
              var local;
              Object.defineProperty(receiver, i, {
                enumerable: true,
                get: function () {
                  return local;
                },
                set: function (val) {
                  local = val;
                }
              });
            }());
            receiver[i] = giver[i];
          }
        }
      }
      return receiver;
    };
  };
});