diff --git a/user.js b/user.js
index 439f6a7..f7da009 100644
--- a/user.js
+++ b/user.js
@@ -52,7 +52,6 @@ user_pref("network.predictor.enabled", false);
 /** EXPERIMENTAL ***/
 user_pref("layout.css.grid-template-masonry-value.enabled", true);
 user_pref("dom.enable_web_task_scheduling", true);
-user_pref("layout.css.has-selector.enabled", true);
 user_pref("dom.security.sanitizer.enabled", true);
 
 /****************************************************************************