Glad to hear that the nightly-build of WebUI.NET Framework 3.0 resolves the reported problem.

Should you need further assistance or run into any problems regarding our controls, feel free to leave a message in our community. We would be happy to assist you again.

Sorry for the delay in sending this.

The nightly-build of WebUI.NET Framework 3.0 which includes the changes on IEMozBridge.js is enclosed as attachment in this thread: WebCombo Hiding Grid Component when configured in https in Firefox browser. Please have the hotfix evaluated on your end and let me know the result.

How to undo change the cell/row values after validation fails?

The above question taken from screenshot 2.png (attached) in Sachin Jain initial post.

You can invoke UndoChanges() method on WebGridRow object such as shown in the following snippet code.

function ValidateRowCell()
{
    var grid = ISGetObject("WebGrid1");
    grid.RootTable.GetRow(0).UndoChanges();
}

Hope this helps.

The issue is reproducible when I switch system time zone to the zone that has Daylight Saving Time. In this case, I use (UTC-05:00) Eastern time (US & Canada).

The problem has been forwarded to WebScheduler development team. It is filed under ASPNET-290.

I will keep you updated with any news I heard from the team regarding ASPNET-290.

I enclose IEMozBridge.js file as attachment. Please add this file into "CommonLibrary\Shared" folder to fix the problem on Firefox browser.

If you are using SmartWebResources, I'll provide the nightly-build of WebUI.NET Framework 3.0 which includes the changes on IEMozBridge.js in the next couple of days.

This should helps.