diff --git a/data/category-ads b/data/category-ads
index 3fac1c65..ef9d4bcf 100644
--- a/data/category-ads
+++ b/data/category-ads
@@ -111,6 +111,9 @@ regexp:^pinggai\d\.caixin\.com$
 adq.chinaso.com
 stat.chinaso.com
 
+# FireFox chinese version tracker
+sb.firefox.com.cn
+
 # Httpool
 toboads.com