Firefox does not open Bootstrap modal

I have the following HTML code:

         <div class="col-sm-4 col-md-4 col-lg-3 empresa-button">
              <button data-toggle="tooltip" data-placement="bottom" onclick="setReturnURL('link');" title="" class=" btn btn-default" data-original-title="mensagem">
                   <span data-toggle="modal" data-target="#LoginContainer">
                                            Ver detalhes da empresa
                   </span>
              </button>
         </div>

Everything works fine in Chrome, however in Firefox I can not open the modal by clicking on <span>