The month select in the datepicker doesn\'t work in FireFox if it is within a bootstrap-modal.
I found two fixes for this bug:
Fix 1: If you remove the tabindex attr in div.modal, the month select works just fine. The only issue I had with this solution is that, on IE (any version) you still need to double-click the month dropwdown for it to open up.
Fix2: The second solution you can find at: http://jsfiddle.net/nKXF2/1/ By overriding the enforceFocus function which was proposed in this question also, you get the month dropdown to work again.
$('#modal').on('show', function () {
$.fn.modal.Constructor.prototype.enforceFocus = function () { };
});
I think this second one is the best.