Version 4.7.23

applications/core/interface/file/cfield.php

@@ -47,6 +47,8 @@ try
 	\IPS\Output::i()->sendHeader( "Content-Length: " . $file->filesize() );
 	\IPS\Output::i()->sendHeader( "Content-Security-Policy: default-src 'none'; sandbox" );
 	\IPS\Output::i()->sendHeader( "X-Content-Security-Policy:  default-src 'none'; sandbox" );
+	\IPS\Output::i()->sendHeader( "Cross-Origin-Opener-Policy: same-origin" );
+
 	$file->printFile();
 	exit;
 }