Bug 746466 - Gradient background in about:home is only one viewport height tall. r=dao

browser/base/content/abouthome/aboutHome.css

@@ -45,8 +45,6 @@ html {
   font: message-box;
   font-size: 100%;
   background-color: hsl(0,0%,90%);
-  background-image: url(chrome://browser/content/abouthome/noise.png),
-                    -moz-linear-gradient(hsla(0,0%,100%,.7), hsla(0,0%,100%,.4));
   color: #000;
   height: 100%;
 }
@@ -57,6 +55,8 @@ body {
   -moz-box-orient: vertical;
   width: 100%;
   height: 100%;
+  background-image: url(chrome://browser/content/abouthome/noise.png),
+                    -moz-linear-gradient(hsla(0,0%,100%,.7), hsla(0,0%,100%,.4));
 }
 
 input,