diff --git a/modules/programs/firefox/mkFirefoxModule.nix b/modules/programs/firefox/mkFirefoxModule.nix
index 6c17adaf3..8007a9a49 100644
--- a/modules/programs/firefox/mkFirefoxModule.nix
+++ b/modules/programs/firefox/mkFirefoxModule.nix
@@ -901,6 +901,7 @@ in
                       || profile.settings != { }
                       || profile.extraConfig != ""
                       || profile.bookmarks.configFile != null
+                      || profile.extensions.settings != { }
                     )
                     {
                       text =