css clear in safari and chrome creates an extra line, not in firefox

Adding clear: left, clear: right, or clear:both to an element would create an extra carriage return in Firefox, but not in Chrome and Safari, it is very frustra开发者_如何学Goting, anyone know how to fix this?

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.clear-nobr {clear:both;line-height:0!important;font-size:0!important;}

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If you are adding the style to the line break tag (<br>) then this will add a line break as should be expected. You could try using a div instead since they have zero height when there is no content:

<div style="clear:both"></div>