diff --git a/browser/locales/en-US/chrome/browser/sanitize.dtd b/browser/locales/en-US/chrome/browser/sanitize.dtd
index 1381d457349c..7e4adc35ff81 100644
--- a/browser/locales/en-US/chrome/browser/sanitize.dtd
+++ b/browser/locales/en-US/chrome/browser/sanitize.dtd
@@ -58,5 +58,5 @@ that require it.  -->
      mockup at bug 480169 -->
 <!ENTITY sanitizeEverythingUndoWarning     "This action cannot be undone.">
 
-<!ENTITY dialog.width                 "32em">
+<!ENTITY dialog.width                 "28em">
 <!ENTITY column.width                 "14em">