diff --git a/modules/programs/firefox.nix b/modules/programs/firefox.nix
index c53b4f50f..2e1b335c0 100644
--- a/modules/programs/firefox.nix
+++ b/modules/programs/firefox.nix
@@ -428,7 +428,7 @@ in {
         mkIf (profile.userContent != "") { text = profile.userContent; };
 
       "${profilesPath}/${profile.path}/user.js" = mkIf (profile.settings != { }
-        || profile.extraConfig != "" || profile.bookmarks != { }) {
+        || profile.extraConfig != "" || profile.bookmarks != [ ]) {
           text =
             mkUserJs profile.settings profile.extraConfig profile.bookmarks;
         };