code: function setGeckoEditingOptions() {
          function setOpts() {
            refreshContentEditable();
  
            setEditorCommandState("StyleWithCSS", false);
            setEditorCommandState("enableInlineTableEditing", false);
  
            if (!settings.object_resizing) {
              setEditorCommandState("enableObjectResizing", false);
            }
          }
  
          if (!settings.readonly) {
            editor.on('BeforeExecCommand MouseDown', setOpts);
          }
        }
docs: Sets various Gecko editing options on mouse down and before a execCommand to disable inline table editing that is broken etc.