diff --git a/supported b/supported
index 34cacd1..d8a13ea 100644
--- a/supported
+++ b/supported
@@ -66,3 +66,4 @@ Exclude some KDE-specific pieces:
 Exclude specific packages
 
  * Extra-Exclude: apt-xapian-index # See lp:798437
+ * Extra-Exclude: firefox-locale-* # See lp:820056