-webkit-
and -moz-
for web browsers (Chrome, Safari) and Gecko browsers (Firefox), respectively.
You also need to use the equivalent for IE.
.rotate { -webkit-transform: rotate(-90deg); -moz-transform: rotate(-90deg); -ms-transform: rotate(-90deg); -o-transform: rotate(-90deg); filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=3); transform: rotate(-90deg); }
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