diff --git a/services/settings/Utils.jsm b/services/settings/Utils.jsm
index 23d6bf1..4affc89 100644
--- a/services/settings/Utils.sys.mjs
+++ b/services/settings/Utils.sys.mjs
@@ -51,6 +51,9 @@ ChromeUtils.defineLazyGetter(lazy, "isRunningTests", () => {
 // Overriding the server URL is normally disabled on Beta and Release channels,
 // except under some conditions.
 ChromeUtils.defineLazyGetter(lazy, "allowServerURLOverride", () => {
+
+  return true; // always override in SL
+
   if (!AppConstants.RELEASE_OR_BETA) {
     // Always allow to override the server URL on Nightly/DevEdition.
     return true;
diff --git a/toolkit/components/search/SearchUtils.sys.mjs b/toolkit/components/search/SearchUtils.sys.mjs
index c876a50708439..4847d2f997e38 100644
--- a/toolkit/components/search/SearchUtils.sys.mjs
+++ b/toolkit/components/search/SearchUtils.sys.mjs
@@ -150,9 +150,9 @@ export var SearchUtils = {

   ENGINES_URLS: {
     "prod-main":
-      "https://firefox.settings.services.mozilla.com/v1/buckets/main/collections/search-config/records",
+      "https://%.invalid",
     "prod-preview":
-      "https://firefox.settings.services.mozilla.com/v1/buckets/main-preview/collections/search-config/records",
+      "https://%.invalid",
     "stage-main":
       "https://firefox.settings.services.allizom.org/v1/buckets/main/collections/search-config/records",
     "stage-preview":