[Bug] backspace key trigger navigating back

Open URL: https://grapesjs.com/
Click on: "Newsletter Demo" buttom
Delete a element from editor usign "backspace key"          (NOT using supr key)

The behavior is:  the navagator is going back and the editor is lost.

I am trying this but it doesn't work:

      **$document.on('keydown', function(e){
          if(e.which === 8){ // you can add others here inside brackets.
            e.preventDefault();
            e.stopPropagation();
          }
      });**

i can do something over/inside editor instance  to disable "firefox behavior" and prevent go back in history in browser?


thanks.