diff --git a/src/js/scriptlets/element-picker.js b/src/js/scriptlets/element-picker.js
index afea44382..df245195f 100644
--- a/src/js/scriptlets/element-picker.js
+++ b/src/js/scriptlets/element-picker.js
@@ -880,6 +880,10 @@ var startPicker = function(details) {
         'text/html'
     );
 
+    // Provide an id users can use as anchor to personalize uBO's element
+    // picker style properties.
+    parsedDom.documentElement.id = 'ublock0-epicker';
+
     frameDoc.replaceChild(
         frameDoc.adoptNode(parsedDom.documentElement),
         frameDoc.documentElement