diff --git a/librewolf.cfg b/librewolf.cfg
index 1ad0cea..7f15014 100644
--- a/librewolf.cfg
+++ b/librewolf.cfg
@@ -1477,7 +1477,7 @@ lockPref("javascript.options.shared_memory", false);
 // So overall, disabling SW should enhance performance because it blocks SW Scripts.
 // [NOTE] Service worker APIs are hidden (in Firefox) and cannot be used when in PB mode.
 // [NOTE] Service workers only run over HTTPS. Service Workers have no DOM access.
-lockPref("dom.serviceWorkers.enabled", false);
+defaultPref("dom.serviceWorkers.enabled", false);
 
 // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
 // Section : General Settings 1/3