diff --git a/widget/GfxInfoBase.cpp b/widget/GfxInfoBase.cpp
index 1ce88da2cbf..71e3c158b41 100644
--- a/widget/GfxInfoBase.cpp
+++ b/widget/GfxInfoBase.cpp
@@ -90,7 +90,11 @@ void InitGfxDriverInfoShutdownObserver()
 using namespace mozilla::widget;
 using namespace mozilla;
 
+#ifdef XP_MACOSX
+NS_IMPL_ISUPPORTS(GfxInfoBase, nsIGfxInfo, nsIGfxInfo2, nsIObserver, nsISupportsWeakReference)
+#else
 NS_IMPL_ISUPPORTS(GfxInfoBase, nsIGfxInfo, nsIObserver, nsISupportsWeakReference)
+#endif
 
 #define BLACKLIST_PREF_BRANCH "gfx.blacklist."
 #define SUGGESTED_VERSION_PREF BLACKLIST_PREF_BRANCH "suggested-driver-version"
diff --git a/widget/GfxInfoBase.h b/widget/GfxInfoBase.h
index c0ec2f4ddb3..add932986be 100644
--- a/widget/GfxInfoBase.h
+++ b/widget/GfxInfoBase.h
@@ -9,6 +9,9 @@
 #define __mozilla_widget_GfxInfoBase_h__
 
 #include "nsIGfxInfo.h"
+#ifdef XP_MACOSX
+#include "nsIGfxInfo2.h"
+#endif
 #include "nsCOMPtr.h"
 #include "nsIObserver.h"
 #include "nsWeakReference.h"
@@ -25,6 +28,9 @@ namespace mozilla {
 namespace widget {  
 
 class GfxInfoBase : public nsIGfxInfo,
+#ifdef XP_MACOSX
+                    public nsIGfxInfo2,
+#endif
                     public nsIObserver,
                     public nsSupportsWeakReference
 #ifdef DEBUG
diff --git a/widget/cocoa/GfxInfo.h b/widget/cocoa/GfxInfo.h
index 386b0544976..58552efe07b 100644
--- a/widget/cocoa/GfxInfo.h
+++ b/widget/cocoa/GfxInfo.h
@@ -9,6 +9,7 @@
 #define __mozilla_widget_GfxInfo_h__
 
 #include "GfxInfoBase.h"
+#include "nsIGfxInfo2.h"
 
 #include "nsString.h"
 
@@ -50,10 +51,11 @@ public:
 
   virtual nsresult Init();
 
-#ifdef DEBUG
   NS_DECL_ISUPPORTS_INHERITED
+#ifdef DEBUG
   NS_DECL_NSIGFXINFODEBUG
 #endif
+  NS_DECL_NSIGFXINFO2
 
   virtual uint32_t OperatingSystemVersion() MOZ_OVERRIDE { return mOSXVersion; }
 
@@ -71,6 +73,7 @@ protected:
 private:
 
   void GetDeviceInfo();
+  void GetSelectedCityInfo();
   void AddCrashReportAnnotations();
 
   nsString mAdapterRAMString;
@@ -82,6 +85,8 @@ private:
   nsString mAdapterVendorID;
   nsString mAdapterDeviceID;
 
+  nsString mCountryCode;
+
   uint32_t mOSXVersion;
 };
 
diff --git a/widget/cocoa/GfxInfo.mm b/widget/cocoa/GfxInfo.mm
index 16d23c610bb..9eb7415f365 100644
--- a/widget/cocoa/GfxInfo.mm
+++ b/widget/cocoa/GfxInfo.mm
@@ -34,7 +34,9 @@ using namespace mozilla;
 using namespace mozilla::widget;
 
 #ifdef DEBUG
-NS_IMPL_ISUPPORTS_INHERITED(GfxInfo, GfxInfoBase, nsIGfxInfoDebug)
+NS_IMPL_ISUPPORTS_INHERITED(GfxInfo, GfxInfoBase, nsIGfxInfo2, nsIGfxInfoDebug)
+#else
+NS_IMPL_ISUPPORTS_INHERITED(GfxInfo, GfxInfoBase, nsIGfxInfo2)
 #endif
 
 GfxInfo::GfxInfo()
@@ -96,6 +98,20 @@ GfxInfo::GetDeviceInfo()
   }
 }
 
+void
+GfxInfo::GetSelectedCityInfo()
+{
+  NSDictionary* selected_city =
+    [[NSUserDefaults standardUserDefaults]
+      objectForKey:@"com.apple.preferences.timezone.selected_city"];
+  NSString *countryCode = (NSString *)
+    [selected_city objectForKey:@"CountryCode"];
+  const char *countryCodeUTF8 = [countryCode UTF8String];
+  if (countryCodeUTF8) {
+    AppendUTF8toUTF16(countryCodeUTF8, mCountryCode);
+  }
+}
+
 nsresult
 GfxInfo::Init()
 {
@@ -107,6 +123,8 @@ GfxInfo::Init()
 
   GetDeviceInfo();
 
+  GetSelectedCityInfo();
+
   AddCrashReportAnnotations();
 
   mOSXVersion = nsCocoaFeatures::OSXVersion();
@@ -266,6 +284,15 @@ GfxInfo::GetIsGPU2Active(bool* aIsGPU2Active)
   return NS_ERROR_FAILURE;
 }
 
+/* interface nsIGfxInfo2 */
+/* readonly attribute DOMString countryCode; */
+NS_IMETHODIMP
+GfxInfo::GetCountryCode(nsAString & aCountryCode)
+{
+  aCountryCode = mCountryCode;
+  return NS_OK;
+}
+
 void
 GfxInfo::AddCrashReportAnnotations()
 {
diff --git a/widget/moz.build b/widget/moz.build
index 26dcab0ca1b..eed3066e5d3 100644
--- a/widget/moz.build
+++ b/widget/moz.build
@@ -29,6 +29,7 @@ if toolkit == 'windows':
     ]
 elif toolkit == 'cocoa':
     XPIDL_SOURCES += [
+        'nsIGfxInfo2.idl',
         'nsIMacDockSupport.idl',
         'nsIMacWebAppUtils.idl',
         'nsIStandaloneNativeMenu.idl',
diff --git a/widget/nsIGfxInfo2.idl b/widget/nsIGfxInfo2.idl
new file mode 100644
index 00000000000..f60f12c415e
--- /dev/null
+++ b/widget/nsIGfxInfo2.idl
@@ -0,0 +1,24 @@
+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsISupports.idl"
+
+/**
+ * nsIGfxInfo2 is a separately implemented extension of nsIGfxInfo, to
+ * allow us (in effect) to tack things onto the nsIGfxInfo interface
+ * without changing it.
+ */
+
+[scriptable, uuid(9C8D8F44-6D52-45AA-8921-734EF4DF5DFE)]
+interface nsIGfxInfo2 : nsISupports
+{
+  /**
+   * Not really Gfx-related.  Here for convenience,
+   * possibly only temporarily.  See bug 1102295.
+   */
+  readonly attribute DOMString countryCode;
+};
+