diff --git a/portage/package.mask b/portage/package.mask
index 9d321f4..21f9344 100644
--- a/portage/package.mask
+++ b/portage/package.mask
@@ -9,6 +9,7 @@
 app-admin/sudo
 gui-wm/hikari
 sys-libs/libunwind
+www-client/firefox
 
 # Gentoo repository.
 app-office/libreoffice::gentoo