diff --git a/mozilla/themes/classic/navigator/win/navigator.css b/mozilla/themes/classic/navigator/win/navigator.css
index 016a587a92a..b564d23c24a 100644
--- a/mozilla/themes/classic/navigator/win/navigator.css
+++ b/mozilla/themes/classic/navigator/win/navigator.css
@@ -26,6 +26,11 @@
     list-style-image      : url("chrome://global/skin/scroll-down.gif");
   }
 
+#ubhist-popup > menuitem
+  {
+    max-width             : 550px !important;
+  }
+  
 #ubhist > .menubutton-icon-internal-box
   {
     border-left           : 1px solid threedhighlight;
diff --git a/mozilla/themes/modern/navigator/navigator.css b/mozilla/themes/modern/navigator/navigator.css
index 90bc04a7c89..fa3b3a9dbdc 100644
--- a/mozilla/themes/modern/navigator/navigator.css
+++ b/mozilla/themes/modern/navigator/navigator.css
@@ -347,9 +347,9 @@ window[chromehidden~="extrachrome"] .chromeclass-extrachrome {
     padding               : 0px;
   }
 
-#ubhist-popup
+#ubhist-popup > menuitem
   {
-    max-width             : none !important;
+    max-width             : 550px !important;
   }
 
 #action-popup