diff --git a/mozilla/xpfe/components/console/resources/content/consoleBindings.xml b/mozilla/xpfe/components/console/resources/content/consoleBindings.xml
index 4b18e9bd116..1133ab89a8f 100644
--- a/mozilla/xpfe/components/console/resources/content/consoleBindings.xml
+++ b/mozilla/xpfe/components/console/resources/content/consoleBindings.xml
@@ -15,7 +15,7 @@
       </xul:vbox>
     </content>
   
-    <implementation>
+    <implementation implements="nsIConsoleListener">
       <field name="limit" readonly="true">
         250
       </field>
@@ -70,20 +70,15 @@
         <body><![CDATA[
           this.mCount = 0;
           
-          this.mConsoleListener = {
-            console: this, 
-            observe : function(aObject) { this.console.appendItem(aObject); }
-          };
-          
           this.mConsoleRowBox = document.getAnonymousElementByAttribute(this, "role", "console-rows");
           this.mStrBundle = document.getAnonymousElementByAttribute(this, "role", "string-bundle");
           
           try {
-            var isupports = Components.classes['@mozilla.org/consoleservice;1'].getService();
-            this.mCService = isupports.QueryInterface(Components.interfaces.nsIConsoleService);
-            this.mCService.registerListener(this.mConsoleListener);
+            this.mCService = Components.classes['@mozilla.org/consoleservice;1']
+                           .getService(Components.interfaces.nsIConsoleService);
+            this.mCService.registerListener(this);
           } catch (ex) {
-            appendItem(
+            appendMessage(
               "Unable to display errors - couldn't get Console Service component. " +
               "(Missing @mozilla.org/consoleservice;1)");
             return;
@@ -97,7 +92,7 @@
     
       <method name="destroy">
         <body><![CDATA[
-          this.mCService.unregisterListener(this.mConsoleListener);
+          this.mCService.unregisterListener(this);
         ]]></body>
       </method>
     
@@ -121,33 +116,22 @@
         
           // Populate with messages after latest "clear"
           while (++i < messages.length)
-            this.appendItem(messages[i]);
+            this.observe(messages[i]);
         ]]></body>
       </method>
 
-      <method name="appendItem">
-        <parameter name="aObject"/>
+      <!-- nsIConsoleListener -->
+      <method name="observe">
+        <parameter name="aConsoleMessage"/>
         <body><![CDATA[
-          if (!aObject.message) return;
-
-          try {
-            // Try to QI it to a script error to get more info
-            var scriptError = aObject.QueryInterface(Components.interfaces.nsIScriptError);
-            
+          if (aConsoleMessage instanceof Components.interfaces.nsIScriptError) {
             // filter chrome urls
-            if (!this.showChromeErrors && scriptError.sourceName.substr(0, 9) == "chrome://")
+            if (!this.showChromeErrors && /^chrome:/.test(aConsoleMessage.sourceName))
               return;
  
-            this.appendError(scriptError);
-          } catch (ex) {
-            try {
-              // Try to QI it to a console message
-              var msg = aObject.QueryInterface(Components.interfaces.nsIConsoleMessage);
-              this.appendMessage(msg.message);
-            } catch (ex2) {
-              // Give up and append the object itself as a string
-              this.appendMessage(aObject);
-            }
+            this.appendError(aConsoleMessage);
+          } else {
+            this.appendMessage(aConsoleMessage.message);
           }
         ]]></body>
       </method>
