firefox cannot show ext charting .

                                   @(X.Panel()
       .Title("Column Chart")
       .Layout(LayoutType.Fit)
                .Width(450)
                .MinWidth(100)
                .MinHeight(70)
                .Height(250)
       
       .Items(
           X.Chart()
               .ID("Chart5")
               .Shadow(true)
               .StyleSpec("background:#fff;")
               .Animate(true)
               .Store(X.Store()
                   .Data(Model)
                   .Model(X.Model()
                       .Fields(
                           X.ModelField().Name("Name"),
                           X.ModelField().Name("Data1")
                       )
                   )
                   .Proxy(X.AjaxProxy()
                       .Url(Url.Action("GetData"))
                       .Reader(X.JsonReader().Root("data"))
                   )
               )
               .Axes(
                   X.NumericAxis()
                       .Fields("Data1")
                       .Grid(true)
                       .Title("Number of Hits")
                       .Minimum(0)
                       .Label(X.AxisLabel()
                           .Renderer(r => r.Handler = "return Ext.util.Format.number(value, '0,0');")
                       ),
                   X.CategoryAxis()
                       .Position(Position.Bottom)
                       .Fields("Name")
                       //.Title("Month of the Year")
               )
               .Series(X.ColumnSeries()
                   .Axis(Position.Left)
                   .Highlight(true)
                   .XField("Name")
                   .YField("Data1")
                   .Tips(X.ChartTip()
                       .TrackMouse(true)
                       .Width(140)
                       .Height(28)
                       .Renderer(r => r.Handler = "this.setTitle(storeItem.get('Name') + ': ' + storeItem.get('Data1'));")
                   )
                   .Label(X.SeriesLabel()
                       .Display(SeriesLabelDisplay.InsideEnd)
                       .Field(new[] { "Data1" })
                       .Orientation(Orientation.Horizontal)
                       .Color("#333")
                       .TextAnchor("middle")
                       .Renderer(r => r.Handler = "return Ext.util.Format.number(value, '0');")
                   )
               )
       )
                                   )

Hi team, I am using ext net charting into my MVC PROJECT,when debugging (tool:VS 2013), only firefox cannot show the charting, IE and chrome run okay. could you advise it? thanks in advance. part coding as below: // I put the chart into jquery portlet , only portlet can be showed, but the chart which should be put into content of the portlet cannot be presented. <div id="effect4" style="display:none" class="portlet"> <div class="portlet-header">Table 4</div> <div class="portlet-content"> // BELOW IS THE CHART @(X.Panel() .Title("Column Chart") .Layout(LayoutType.Fit) .Width(450) .MinWidth(100) .MinHeight(70) .Height(250) .Items( X.Chart() .ID("Chart5") .Shadow(true) .StyleSpec("background:#fff;") .Animate(true) .Store(X.Store() .Data(Model) .Model(X.Model() .Fields( X.ModelField().Name("Name"), X.ModelField().Name("Data1") ) ) .Proxy(X.AjaxProxy() .Url(Url.Action("GetData")) .Reader(X.JsonReader().Root("data")) ) ) .Axes( X.NumericAxis() .Fields("Data1") .Grid(true) .Title("Number of Hits") .Minimum(0) .Label(X.AxisLabel() .Renderer(r => r.Handler = "return Ext.util.Format.number(value, '0,0');") ), X.CategoryAxis() .Position(Position.Bottom) .Fields("Name") //.Title("Month of the Year") ) .Series(X.ColumnSeries() .Axis(Position.Left) .Highlight(true) .XField("Name") .YField("Data1") .Tips(X.ChartTip() .TrackMouse(true) .Width(140) .Height(28) .Renderer(r => r.Handler = "this.setTitle(storeItem.get('Name') + ': ' + storeItem.get('Data1'));") ) .Label(X.SeriesLabel() .Display(SeriesLabelDisplay.InsideEnd) .Field(new[] { "Data1" }) .Orientation(Orientation.Horizontal) .Color("#333") .TextAnchor("middle") .Renderer(r => r.Handler = "return Ext.util.Format.number(value, '0');") ) ) ) ) // CHART END </div> </div>