13711N/Adiff --git a/modules/libpref/src/init/all.js b/modules/libpref/src/init/all.js

13711N/Aindex 4e40cfa..b44ec96 100644

13711N/A--- a/modules/libpref/src/init/all.js

13711N/A+++ b/modules/libpref/src/init/all.js

13711N/A@@ -1024,7 +1024,7 @@ pref("intl.charsetmenu.browser.cache.size", 5);

13711N/A pref("intl.charset.detector", "chrome://global/locale/intl.properties");

13711N/A pref("intl.charset.default", "chrome://global-platform/locale/intl.properties");

13711N/A pref("intl.ellipsis", "chrome://global-platform/locale/intl.properties");

13711N/A-pref("intl.locale.matchOS", false);

13711N/A+pref("intl.locale.matchOS", true);

13711N/A // fallback charset list for Unicode conversion (converting from Unicode)

13711N/A // currently used for mail send only to handle symbol characters (e.g Euro, trademark, smartquotes)

13711N/A // for ISO-8859-1

13711N/A