diff --git a/browser/base/content/tabview/modules/utils.jsm b/browser/base/content/tabview/modules/utils.jsm
index 899ec7204d93..3eb566f43f9c 100644
--- a/browser/base/content/tabview/modules/utils.jsm
+++ b/browser/base/content/tabview/modules/utils.jsm
@@ -226,7 +226,7 @@ var Utils = {
   
   // ___ Files
   getInstallDirectory: function(id) { 
-    var file = extensionManager.getInstallLocation(id).getItemFile(id, "install.rdf");  
+    var file = extensionManager.getInstallLocation(id).getItemFile(id, "install.rdf"); 
     return file.parent;  
   }, 
   
@@ -327,7 +327,13 @@ var Utils = {
   expandObject: function(obj) {
       var s = obj + ' = {';
       for(prop in obj) {
-        var value = obj[prop]; 
+        var value;
+        try {
+          value = obj[prop]; 
+        } catch(e) {
+          value = '[!!error retrieving property]';
+        }
+        
         s += prop + ': ';
         if(typeof(value) == 'string')
           s += '\'' + value + '\'';