diff --git a/plugins/floatpanel/plugin.js b/plugins/floatpanel/plugin.js
index e3542849349..447c0706bdc 100644
--- a/plugins/floatpanel/plugin.js
+++ b/plugins/floatpanel/plugin.js
@@ -64,6 +64,10 @@ CKEDITOR.plugins.add( 'floatpanel', {
 			// Disable native browser menu. (#4825)
 			element.disableContextMenu();
 
+			// Floating panels are placed outside the main editor UI, so we must
+			// make them application regions as well. (#9543)
+			element.setAttribute( 'role', 'application' );
+
 			this.element = element;
 
 			this._ = {