When dumping the exception message, also dump ex.stack.  (We know this works because it is Firefox only.)
diff --git a/js/ccnxProtocol/modules/ContentChannel.jsm b/js/ccnxProtocol/modules/ContentChannel.jsm
index fc7f500..4e83f10 100644
--- a/js/ccnxProtocol/modules/ContentChannel.jsm
+++ b/js/ccnxProtocol/modules/ContentChannel.jsm
@@ -147,7 +147,7 @@
 		
         this.requestContent(contentListener);
     } catch (ex) {
-        dump("ContentChannel.asyncOpen exception: " + ex + "\n");
+        dump("ContentChannel.asyncOpen exception: " + ex + "\n" + ex.stack);
     }
 };