Background: I developed a Web site for a pro athlete a few months back and used a few CSS3 attributes: rounded edges, drop shadow, and gradient fill. Works fine in Safari, Firefox, Chrome. IE8 ...

If you've already defined some of the prefixes, Web Essentials will skip those and generate any missing ones. This extension does not support CSS3 background gradients, but the creator (Mads ...

Unless you add a border or a background color to your widgets, the rounded corners won't show. Internet Explorer (IE) versions 6 through 9 don't support the "border-radius" property.