-webkit-border-radius: 8px;
-moz-border-radius: 8px;
border-radius: 8px;

-moz-margin:-4px;
margin: 1px;

@-moz-document url-prefix(){
    body {
        color: #000;
    }
    div{
       margin:-4px;
    }
}

@media screen and (-webkit-min-device-pixel-ratio:0) {
    body {
        color: #90f;
    }
}

<!--[if IE 9]>
    body {
        background:red;
    }
<![endif]-->

<!--[if IE 6]>
    <link rel="stylesheet" type="text/css" href="iespecific.css" />
<![endif]-->