diff --git a/srcpkgs/firefox/files/vendor.js b/srcpkgs/firefox/files/vendor.js
index d8d606bc15d..5be4f1b5f3f 100644
--- a/srcpkgs/firefox/files/vendor.js
+++ b/srcpkgs/firefox/files/vendor.js
@@ -1,5 +1,5 @@
 // Use LANG environment variable to choose locale
-pref("intl.locale.matchOS", true);
+pref("intl.locale.requested", "");
 
 // Disable default browser checking.
 pref("browser.shell.checkDefaultBrowser", false);