ok Noté 3 sur 5 étoiles

Nice add-on!
But i find out a way to block overlays using this css code:
/* Selects every <div> element whose style attribute value contains the substring "z-index" */
div[style*="z-index"] {
display: none !important;
}
Put this code in your userContent.css file.
Test page: https://www.groupon.fr/
Note: You must clear cookies in order to get the dialog to display (for testing)