Hi, i noticed that generated button can cause problems in mozilla. When form is utilizing validation then usuall form as <asp:Button ID="backtocontent" runat="server" CausesValidation="false" OnClientClick="window.location.href='CmsTabsComplete.aspx'; false;" Text="Go back" /> will not work. It will break in mozilla. I think this is asp.net error. But if we use <button onclick="window.location.href='CmsTabsComplete.aspx';" type="button">Go back</button> everything will work. Here we aren't using normal buttons (input, type submit) and we aren't using server side.