AngularJS Change UI not reflected in $scope for Firefox - angularjs

Question

I'm using Firefox-42.0 and AngularJS v1.4.7.
HTML :
<div class="modal-body">
<p>Select user to share with from the list below.</p>
<div class="form-group">
<label for="">Search:</label>
<input type="text" class="form-control" ng-model="SharedSearchKey" ng-model-options="{ debounce: 600 }" />
</div>
<div class="modal-table" ng-show="usersToShare && usersToShare.length">
<table class="table table-striped table-responsive table-condensed">
<thead>
<tr>
<th>Name</th>
<th>User Name</th>
<th>View Only Tasks</th>
<th>Permission</th>
<th> </th>
</tr>
</thead>
<tbody>
<tr ng-repeat="row in usersToShare">
<td ng-bind="row.ContactName"></td>
<td ng-bind="row.UserName"></td>
<td>
<input type="checkbox" ng-model="row.TaskAssign" ng-init="row.TaskAssign=true" />
</td>
<td>
<select ng-model="row.permission" ng-init="row.permission='1'">
<option value="1">Readonly</option>
<option value="2">Write</option>
</select>
</td>
<td>
<input type="checkbox" ng-model="row.selected" ng-click="toggleSelectThisUser(row)" />
</td>
</tr>
</tbody>
</table>
</div>
JS in Controller :
$scope.toggleSelectThisUser = function (user) {
console.log(user);
};
When i change dropdown and click checkBox, it doesn't reflect in $scope. $scope contains the initial value. This problem occurs in Firefox. But it works fine in google chrome.