CSS3 Rounded and Dotted borders?

I managed to find a solution by accident.

Here's the code:

background-color: none !important;
  border:none !important;
  border-top: 5px dotted #70c1bb !important;
    border-top-width:5px;
    border-right-width:0px;
    border-bottom-width:0px;
    border-left-width:0px;

It'a bug in firefox.see this issue,mozilla doesn't support rounded corner for dotted and dashed border.