diff --git a/app/scripts/fetch_xulrunner b/app/scripts/fetch_xulrunner
index 2d87878a8a..b147d68417 100755
--- a/app/scripts/fetch_xulrunner
+++ b/app/scripts/fetch_xulrunner
@@ -117,6 +117,7 @@ function modify_omni {
 	replace_line 'MOZ_UPDATE_CHANNEL:.+' 'MOZ_UPDATE_CHANNEL: "none",' modules/AppConstants.jsm
 	replace_line '"https:\/\/[^\/]+mozilla.com.+"' '""' modules/AppConstants.jsm
 	
+	# Prompt if major update is available instead of installing automatically on restart
 	replace_line 'if \(!updateAuto\) \{' 'if (update.type == "major") {
       LOG("UpdateService:_selectAndInstallUpdate - prompting because it is a major update");
       AUSTLMY.pingCheckCode(this._pingSuffix, AUSTLMY.CHK_SHOWPROMPT_PREF);