diff --git a/toolkit/locales/en-US/chrome/mozapps/downloads/downloads.dtd b/toolkit/locales/en-US/chrome/mozapps/downloads/downloads.dtd
index 2d6f1824b498..1570d2abf96c 100644
--- a/toolkit/locales/en-US/chrome/mozapps/downloads/downloads.dtd
+++ b/toolkit/locales/en-US/chrome/mozapps/downloads/downloads.dtd
@@ -1,4 +1,7 @@
-<!ENTITY window.width                     "400">
+<!-- LOCALIZATION NOTE (window.width2, window.height): These values should be
+close to the golden ratio (1.618:1) while making sure it's wide enough for long
+file names and tall enough to hint that there are more downloads in the list -->
+<!ENTITY window.width2                    "485">
 <!ENTITY window.height                    "300"> 
 
 <!ENTITY starting.label                   "Starting…">
diff --git a/toolkit/mozapps/downloads/content/downloads.xul b/toolkit/mozapps/downloads/content/downloads.xul
index 2b6dc5f8fa43..37804223a8a5 100644
--- a/toolkit/mozapps/downloads/content/downloads.xul
+++ b/toolkit/mozapps/downloads/content/downloads.xul
@@ -60,7 +60,7 @@
         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
         id="downloadManager" windowtype="Download:Manager"
         orient="vertical" title="&downloads.title;" statictitle="&downloads.title;"
-        width="&window.width;" height="&window.height;" screenX="10" screenY="10"
+        width="&window.width2;" height="&window.height;" screenX="10" screenY="10"
         persist="width height screenX screenY sizemode"
         onload="Startup();" onunload="Shutdown();"
         onclose="return closeWindow(false);">