@@ -2986,6 +2986,9 @@
// Lazy loading iframes
toArray( slide.querySelectorAll( 'iframe[data-src]' ) ).forEach( function( el ) {
+ // Only removing the src doesn't actually unload the frame
+ // in all browsers (Firefox) so we set it to blank first
+ el.setAttribute( 'src', 'about:blank' );
el.removeAttribute( 'src' );
} );
}