diff --git a/browser/base/content/test/browser_discovery.js b/browser/base/content/test/browser_discovery.js
index 83db9bcbe62d..8f3e494869c0 100644
--- a/browser/base/content/test/browser_discovery.js
+++ b/browser/base/content/test/browser_discovery.js
@@ -36,7 +36,7 @@ var iconDiscoveryTests = [
 function runIconDiscoveryTest() {
   var test = iconDiscoveryTests[0];
   var head = doc().getElementById("linkparent");
-  var hasSrc = gProxyFavIcon.hasAttribute("src");
+  var hasSrc = gBrowser.getIcon() != null;
   if (test.pass)
     ok(hasSrc, test.text);
   else
@@ -50,7 +50,7 @@ function runIconDiscoveryTest() {
 function iconDiscovery() {
   setHandlerFunc(runIconDiscoveryTest);
   if (iconDiscoveryTests.length) {
-    gProxyFavIcon.removeAttribute("src");
+    gBrowser.setIcon(gBrowser.selectedTab, null);
 
     var test = iconDiscoveryTests[0];
     var head = doc().getElementById("linkparent");
diff --git a/browser/components/sidebar/src/nsSidebar.js b/browser/components/sidebar/src/nsSidebar.js
index bdce28cebfde..fa8a7756afe7 100644
--- a/browser/components/sidebar/src/nsSidebar.js
+++ b/browser/components/sidebar/src/nsSidebar.js
@@ -197,7 +197,7 @@ function (aDescriptionURL)
   if (browser.shouldLoadFavIcon(browser.selectedBrowser
                                        .contentDocument
                                        .documentURIObject))
-    iconURL = win.gProxyFavIcon.getAttribute("src");
+    iconURL = win.gBrowser.getIcon();
   
   if (!this.validateSearchEngine(aDescriptionURL, iconURL))
     return;
diff --git a/extensions/cookie/test/browser_test_favicon.js b/extensions/cookie/test/browser_test_favicon.js
index cae1720ce044..76579fd5f07e 100644
--- a/extensions/cookie/test/browser_test_favicon.js
+++ b/extensions/cookie/test/browser_test_favicon.js
@@ -5,29 +5,23 @@
 function test() {
   waitForExplicitFinish();
 
-  var prefs = Components.classes["@mozilla.org/preferences-service;1"]
-                        .getService(Components.interfaces.nsIPrefBranch);
-  prefs.setIntPref("network.cookie.cookieBehavior", 1);
+  Services.prefs.setIntPref("network.cookie.cookieBehavior", 1);
 
-  var os = Components.classes["@mozilla.org/observer-service;1"]
-                     .getService(Components.interfaces.nsIObserverService);
-  os.addObserver(function (theSubject, theTopic, theData) {
+  Services.obs.addObserver(function (theSubject, theTopic, theData) {
     var uri = theSubject.QueryInterface(Components.interfaces.nsIURI);
     var domain = uri.host;
 
     if (domain == "example.org") {
       ok(true, "foreign favicon cookie was blocked");
 
-      var prefs = Components.classes["@mozilla.org/preferences-service;1"]
-                            .getService(Components.interfaces.nsIPrefBranch);
-      prefs.setIntPref("network.cookie.cookieBehavior", 0);
+      Services.prefs.setIntPref("network.cookie.cookieBehavior", 0);
 
-      os.removeObserver(arguments.callee, "cookie-rejected");
+      Services.obs.removeObserver(arguments.callee, "cookie-rejected");
 
       finish();
     }
   }, "cookie-rejected", false);
 
   // kick off a favicon load
-  PageProxySetIcon("http://example.org/tests/extensions/cookie/test/damonbowling.jpg");
+  gBrowser.setIcon(gBrowser.selectedTab, "http://example.org/tests/extensions/cookie/test/damonbowling.jpg");
 }