Use the autoSave template option to enable auto-save in browser.

You can specify to auto-save every N changes (default 0 = disabled).

Auto-save works only for GN4 objects being edited (or when the GN4 object has already an id) - therefore, it won't work when editing a new story that you created but never saved.

<attribute name="richText">

  <ui mode="Normal">

    <template 

                  kind="HtmlEditor" 

                  xmlns="http://www.teradp.com/schemas/GN4/1/XmlSchemaExt.xsd" 

                  autoSave="50">

      <objectUI>

        <web width="700" height="300" />

      </objectUI>

     </template>

   </ui>

</attribute>