library "webcomponentsjs" freeze Firefox and Safari

Hi, below there is a simple angular page with a dialog (using angular material). I load webcomponents.js but I never use it in this code.

When firefox download this: <script src="bower_components/webcomponentsjs/webcomponents.js"></script> it seems to freeze for something like 1 second and after the code broke and the dialog never show up.

It seems that webcomponents.js breaks something inside firefox that aster breaks how angular material behave.

<head>
    <base href="/">
    <link rel="stylesheet" href="bower_components/angular-material/angular-material.css"/>
</head>
<body ng-app="sandbox">

<div ng-controller="AppCtrl" id="popupContainer">
    <md-button class="md-primary md-raised" ng-click="showAlert($event)">Alert Dialog</md-button>
</div>

<script src="bower_components/jquery/dist/jquery.js"></script>
<script src="bower_components/angular/angular.js"></script>
<script src="bower_components/angular-material/angular-material.js"></script>

<script src="bower_components/angular-resource/angular-resource.js"></script>
<script src="bower_components/angular-cookies/angular-cookies.js"></script>
<script src="bower_components/angular-sanitize/angular-sanitize.js"></script>
<script src="bower_components/angular-bootstrap/ui-bootstrap-tpls.js"></script>
<script src="bower_components/lodash/dist/lodash.compat.js"></script>
<script src="bower_components/angular-socket-io/socket.js"></script>
<script src="bower_components/angular-ui-router/release/angular-ui-router.js"></script>
<script src="bower_components/angular-validation-match/dist/angular-validation-match.min.js"></script>
<script src="bower_components/ng-file-upload/ng-file-upload.js"></script>
<script src="bower_components/angular-animate/angular-animate.js"></script>
<script src="bower_components/angular-aria/angular-aria.js"></script>
<script src="bower_components/angular-messages/angular-messages.js"></script>

<script src="bower_components/angular-translate/angular-translate.js"></script>
<script src="bower_components/angular-translate-loader-partial/angular-translate-loader-partial.js"></script>
<script src="bower_components/webrtc-adapter/adapter.js"></script>
<script src="bower_components/webcomponentsjs/webcomponents.js"></script>

<script>
    angular.module('sandbox', ['ngMaterial']);

    angular.module('sandbox').controller('AppCtrl', function ($scope, $mdDialog) {
        $scope.showAlert = function (ev) {
            // Appending dialog to document.body to cover sidenav in docs app
            // Modal dialogs should fully cover application
            // to prevent interaction outside of dialog
            $mdDialog.show(
                $mdDialog.alert()
                .parent(angular.element(document.querySelector('#popupContainer')))
                .clickOutsideToClose(true)
                .title('This is an alert title')
                .textContent('You can specify some description text in here.')
                .ariaLabel('Alert Dialog Demo')
                .ok('Got it!')
                .targetEvent(ev)
            );
        };
    });
</script>

</body>
</html>

webcomponents / webcomponentsjs

library "webcomponentsjs" freeze Firefox and Safari #574