Fix middle mouse click opening new window, which was broken by an improvement in our DOM support in the XPCDOM landing (localName should return null in many cases). r=blake sr=jst b=79548

suite/common/contentAreaUtils.js

@@ -102,6 +102,9 @@
 
   function findParentNode(node, parentNode)
   {
+    if (node && node.nodeType == Node.TEXT_NODE) {
+      node = node.parentNode;
+    }
     while (node) {
       var nodeName = node.localName;
       if (!nodeName)