Bug 519390 - Page info sometimes resizes an image incorrectly when it uses scaling. r=dao

browser/base/content/pageinfo/pageInfo.css

@@ -14,3 +14,8 @@ richlistitem[feed]:not([selected="true"]) .feed-subscribe {
 groupbox[closed="true"] > .groupbox-body { 
   visibility: collapse;
 }
+
+/* This following entry can be removed when Bug 522850 is fixed. */
+#thepreviewimage {
+  min-width: 1px;
+}