diff --git a/firefox-mozconfig b/firefox-mozconfig
index fe59c9e..5eae093 100644
--- a/firefox-mozconfig
+++ b/firefox-mozconfig
@@ -28,7 +28,6 @@ ac_add_options --enable-libnotify
 ac_add_options --enable-necko-wifi
 ac_add_options --enable-startup-notification
 ac_add_options --disable-cpp-exceptions
-ac_add_options --enable-shared-js
 ac_add_options --disable-updater
 ac_add_options --enable-url-classifier
 ac_add_options --enable-gio