Pure CSS Triangle

RTC for a bug in FF 5.0 PC where a light stroke is appearing on triangles rendered with CSS.

by bizamajig

HTML

<div class="left-right-pointer"></div>

CSS

body { background: red;  }

.left-right-pointer {
width: 0;
height: 0;
border-top: 20px solid transparent;
border-bottom: 20px solid transparent;

    border-left: 20px solid green;

    border-right: 20px solid green;
    
}