I use this simple, very nice plug-in from Ciaran Gultnieks to hide the black bar at the top of the new WordPress 3.8 front-end, and to hide/show the WordPress toolbar:
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I use this simple, very nice plug-in from Ciaran Gultnieks to hide the black bar at the top of the new WordPress 3.8 front-end, and to hide/show the WordPress toolbar: