diff -Nru ubuntukylin-default-settings-1.4.4/debian/changelog ubuntukylin-default-settings-1.4.4ubuntu0.1/debian/changelog
--- ubuntukylin-default-settings-1.4.4/debian/changelog	2018-03-27 11:08:51.000000000 +0800
+++ ubuntukylin-default-settings-1.4.4ubuntu0.1/debian/changelog	2018-05-02 10:24:15.000000000 +0800
@@ -1,3 +1,9 @@
+ubuntukylin-default-settings (1.4.4ubuntu0.1) bionic-proposed; urgency=medium
+
+  * Set firefox to use the OS default locale. (LP: #1771272)
+
+ -- handsome_feng <jianfengli@ubuntukylin.com>  Wed, 02 May 2018 10:24:15 +0800
+
 ubuntukylin-default-settings (1.4.4) bionic; urgency=medium
 
   * Remove ukui.layout, googlemail.desktop.example.
diff -Nru ubuntukylin-default-settings-1.4.4/debian/firefox/browser/defaults/preferences/all-ubuntukylin.js ubuntukylin-default-settings-1.4.4ubuntu0.1/debian/firefox/browser/defaults/preferences/all-ubuntukylin.js
--- ubuntukylin-default-settings-1.4.4/debian/firefox/browser/defaults/preferences/all-ubuntukylin.js	2018-03-27 11:08:51.000000000 +0800
+++ ubuntukylin-default-settings-1.4.4ubuntu0.1/debian/firefox/browser/defaults/preferences/all-ubuntukylin.js	2018-05-02 10:11:20.000000000 +0800
@@ -1,3 +1,4 @@
 //
 pref("general.config.obscure_value", 0);
 pref("general.config.filename", "ubuntukylin.cfg");
+pref("intl.locale.requested", "");