The slider of the ComponetArt:Grid is not visible in Firefox. However its visible in IE. Following is the code
<componentart:grid id="grdElectionPeriodsDetail" cssclass="grid" editonclickselecteditem="true"
allowediting="true" groupingmode="ConstantRows" groupby="" groupbycssclass=""
groupbytextcssclass="txt" groupbysectioncssclass="grp" groupbysectionseparatorcssclass=""
groupingnotificationtextcssclass="txt" groupingnotificationtext="Drag a column to this area to group by it."
indentcellcssclass="ind" dataareacssclass="GridData" enableviewstate="true" runningmode="Client"
showheader="true" headercssclass="hdr" footercssclass="ftr" pagesize="15" groupingpagesize="10"
pagerstyle="Slider" pagertextcssclass="txt" pagerbuttonwidth="44" pagerbuttonheight="27"
pagerbuttonhoverenabled="true" sliderheight="27" sliderwidth="150" slidergripwidth="9"
sliderpopupoffsetx="80" imagesbaseurl="../images/" pagerimagesfolderurl="../images/pager/"
runat="server" width="650" height="400" treelineimagesfolderurl="../images/lines/"
treelineimagewidth="11" treelineimageheight="11" indentcellwidth="16">
...