iframe editor. hoy to get rid of dialog boxes

I have embed in my web pixlr.com/editor, an free image online editor. We are trying to set up an online print shop and we would like to offer our visitor an editor within our web. The problem is that when you try to leave the page in which pixlr.com/editor is placed, there always appear a dialog box saying “Are you sure you wan to leave this page”. This dialog appears even if you don’t implement any actions in the editor.

I would like to know if there is any possibility of getting rid of that dialog box. I would appreciate any information you can provide.

Thanks indeed!!

https://www.ads-software.com/plugins/iframe/