title: Md-datepicker don't work Firefox ESR 38
body: <p>I use Angular Material with md-datepicker in my app.
  My app has to work on Firefox ESR 38 and 45.
  md-datepicker works well with Firefox ESR 45 but not with version ESR 38.
  I have Angular Material 1.1.4 and AngularJS 1.5.9.
  When I click on datepicher, the calender show but I can't select on the date.
  No error on console.</p>