diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index c06a400520..877e18a43a 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -1326,7 +1326,7 @@ pref("javascript.options.main_thread_stack_quota_cap", 2097152);
 #endif
 
 // Dynamic module import.
-pref("javascript.options.dynamicImport", false);
+pref("javascript.options.dynamicImport", true);
 
 // advanced prefs
 pref("advanced.mailftp",                    false);