Bug introduced in build 2019.1.115+ causes 3 extra <p> </p> when user presses Enter key in FireFox. Happens when Editor is in a Wizard with more than one step. Bug does not occur in builds prior to 2019.1.115.
Try this to reproduce:
<telerik:RadWizard runat="server" ID="rwMain" BorderStyle="Solid" BorderColor="LightGray" BorderWidth="1px" RenderMode="Lightweight" DisplayNavigationButtons="True">
<WizardSteps>
<telerik:RadWizardStep ID="RadWizardStep2" Title="Content Template" StepType="Step">
<h1>hello!</h1>
</telerik:RadWizardStep>
<telerik:RadWizardStep ID="RadWizardStep3" Title="Content Editor" StepType="Step">
<telerik:RadEditor ID="ContentEditor" runat="server" RenderMode="Lightweight"></telerik:RadEditor>
</telerik:RadWizardStep>
</WizardSteps>
</telerik:RadWizard>
Hope you can fix it.
Thank you!!