diff --git a/CREDITS b/CREDITS
index 84e3965..812fc20 100644
--- a/CREDITS
+++ b/CREDITS
@@ -25,6 +25,10 @@ N: gecko-dev
 W: https://hg.mozilla.org/
 L: MPL 2.0
 
+N: MaterialFox
+W: https://github.com/muckSponge/MaterialFox
+L: MIT
+
 N: Multi-Account-Containers
 W: https://github.com/mozilla/multi-account-containers
 L: MPL 2.0