• Extend the extension point org.eclipse.eef.properties.ui.eefTabDescriptorFilter ;
  
• Change settings in Preferences > Sirius > Sirius Properties View.
  

The Buzilla I've just opened is related to the Sirius product. Should I change this in favor of EEF ?

1. Contribute to the eefTabDescriptorFilter extension point
   

   <plugin>
     <extension
           point="org.eclipse.eef.properties.ui.eefTabDescriptorFilter">
        <descriptor
              class="legacy.sirius.tab.filter.LegacyTabFilter"
              description="Filters out Sirius' legacy tabs from the Properties view when editing custom models with a Sirius based diagram editor."
              id="legacy.sirius.tab.filter"
              label="Filter Legacy Sirius Tabs">
        </descriptor>
     </extension>
   </plugin>
   

   
   
2. Implement the filter
   

   package legacy.sirius.tab.filter;
   
   import static java.util.Arrays.asList;
   
   import java.util.HashSet;
   import java.util.Set;
   
   import org.eclipse.eef.properties.ui.api.IEEFTabDescriptor;
   import org.eclipse.eef.properties.ui.api.IEEFTabDescriptorFilter;
   import org.eclipse.emf.ecore.EObject;
   import org.eclipse.gef.EditPart;
   import org.eclipse.gmf.runtime.notation.View;
   import org.eclipse.jface.viewers.ISelection;
   import org.eclipse.jface.viewers.StructuredSelection;
   import org.eclipse.sirius.diagram.ui.part.SiriusDiagramEditor;
   import org.eclipse.sirius.viewpoint.DSemanticDecorator;
   import org.eclipse.ui.IWorkbenchPart;
   
   /**
    * Used to filter out Sirius legacy tabs from the Properties view
    * when the selection is a custom model.
    */
   public class LegacyTabFilter implements IEEFTabDescriptorFilter {
   	
   	/** IDs of the pages to filter out */
   	private static final Set<String> TABS_TO_FILTER_OUT = new HashSet<>(
   			asList("sirius_default_rules_defaultpagesirius_default_rules_defaultgroup", 
   				   "property.tab.semantic", 
   				   "property.tab.documentation",
   				   "property.tab.style",
   				   "property.tab.behaviors",
   				   "property.tab.DiagramPropertySection",
   				   "property.tab.AppearancePropertySection"
   			)
   	);
   
   	@Override
   	public boolean filter(IEEFTabDescriptor tabDescriptor, IWorkbenchPart part, ISelection selection) {
   		if (! isSiriusDiagram(part) || ! tabMustBeFilteredOut(tabDescriptor))
   			return true;
   		
   		try {
   			Object selectedElement = ((StructuredSelection) selection).getFirstElement();
   			View view = (View) ((EditPart) selectedElement).getModel();
   			DSemanticDecorator container = (DSemanticDecorator) view.getElement();
   					
   			return ! isCustomObject(container.getTarget());
   
   		} catch (ClassCastException e) {
   			// The selection does not match our expectations but that's not a problem.
   			// Using a try statement instead of instanceof makes the code clearer.
   		}
   		return true;
   	}
   	
   	private static boolean isCustomObject(EObject object) {
   		return false; // TODO implement true test, for example 'object instanceof MyModel'
   	}
   	
   	private static boolean isSiriusDiagram(IWorkbenchPart part) {
   		return part instanceof SiriusDiagramEditor;
   	}
   
   	private static boolean tabMustBeFilteredOut(IEEFTabDescriptor tabDescriptor) {
   		// 'startsWith' because the ID of the 'Main' group is dynamic and has a suffix at runtime
   		return TABS_TO_FILTER_OUT.stream()
   								 .anyMatch(id -> tabDescriptor.getId().startsWith(id));
   	}
   
   }