diff --git a/user-overrides.js b/user-overrides.js
index fe73a9f..46382b6 100644
--- a/user-overrides.js
+++ b/user-overrides.js
@@ -100,6 +100,8 @@ user_pref("javascript.options.experimental.import_assertions", true);
 user_pref("javascript.options.experimental.shadow_realms", true);
 user_pref("javascript.options.wasm_gc", true);
 user_pref("javascript.options.wasm_function_references", true);
+user_pref("javascript.options.experimental.array_grouping", true);
+//user_pref("javascript.options.experimental.enable_change_array_by_copy", true);
 user_pref("cookiebanners.service.mode", 2);
 user_pref("cookiebanners.service.mode.privateBrowsing", 1);
 user_pref("privacy.globalprivacycontrol.enabled", true);