diff --git a/mozilla/xpfe/global/resources/content/commonDialog.xul b/mozilla/xpfe/global/resources/content/commonDialog.xul
index 16a3866b920..7564fa5877a 100644
--- a/mozilla/xpfe/global/resources/content/commonDialog.xul
+++ b/mozilla/xpfe/global/resources/content/commonDialog.xul
@@ -5,6 +5,7 @@
 <!DOCTYPE window SYSTEM "chrome://global/locale/commonDialog.dtd">
 
  <window
+  style="max-width: 400px;"
 	xmlns:html="http://www.w3.org/TR/REC-html40"
 	xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" 
 	align="vertical"