The menu appears different between chrome/firefox
You can see the difference in this screen : http://postimg.org/image/wvg194dtv/
I'm using primefaces 3, JSF 2 firefox 24.0 Chrome Version 30.0.1599.69 m
< p : layoutUnit style=" font-size: 12px;font-family: Verdana" position="west" size="220" >
...
< p : menu style="width:200px;font-size: 12px;" >
thanks a lot for your help