diff --git a/overlays/nixpkgs/firefox.nix b/overlays/nixpkgs/firefox.nix
index 51f21d6..6ccc50d 100644
--- a/overlays/nixpkgs/firefox.nix
+++ b/overlays/nixpkgs/firefox.nix
@@ -57,7 +57,7 @@
             (envSuffix "XDG_RUNTIME_DIR" "/doc")
             (envSuffix "XDG_RUNTIME_DIR" "/dconf")
 
-            (sloth.concat [sloth.xdgConfigHome "/.mozilla"])
+            (sloth.concat' sloth.xdgConfigHome "/mozilla")
           ];
 
           bind.ro = [