Fixing bug 235457. Make new windows opened through window.open be opened on the context of the opener, and make caps not lie about when capabilities are enabled. r=danm-moz@comcast.net, r=caillon@aillon.org, sr=brendan@mozilla.org, a=dbaron@dbaron.org

suite/browser/navigator.js

@@ -2239,7 +2239,10 @@ function createShowPopupsMenu(parent) {
 function popupBlockerMenuCommand(target) {
   var uri = target.getAttribute("uri");
   if (uri) {
-    window.open(uri, "", target.getAttribute("features"));
+    // Make sure we use the content window to open the popup to
+    // prevent it from being able to set flags it shoudn't be able to
+    // set.
+    window.content.open(uri, "", target.getAttribute("features"));
   }
 }