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@-moz-document url-prefix("http://img.4chan.org"), url-prefix("http://boards.4chan.org/"){

[src^="http://static.4chan.org/support"],hr,[style="width: 300px; position: absolute;left: 20px; border:1px solid black;"],#BF_Widget,.bf,[style="width: 300px; position: absolute;left: 5%; border:1px solid black;"]{display:none!important}

}