diff --git a/data/category-ads b/data/category-ads
index ef9d4bcfc3a..3fac1c6579a 100644
--- a/data/category-ads
+++ b/data/category-ads
@@ -111,9 +111,6 @@ regexp:^pinggai\d\.caixin\.com$
 adq.chinaso.com
 stat.chinaso.com
 
-# FireFox chinese version tracker
-sb.firefox.com.cn
-
 # Httpool
 toboads.com