Add m-esr52 at 52.6.0

14 files changed, 2195 insertions, 0 deletions

diff --git a/toolkit/system/gnome/moz.build b/toolkit/system/gnome/moz.build
new file mode 100644
index 000000000..14b472be3
--- /dev/null
+++ b/toolkit/system/gnome/moz.build
@@ -0,0 +1,37 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+SOURCES += [
+    'nsAlertsIconListener.cpp',
+    'nsGnomeModule.cpp',
+    'nsSystemAlertsService.cpp',
+]
+
+if CONFIG['MOZ_ENABLE_GCONF']:
+    SOURCES += [
+        'nsGConfService.cpp',
+    ]
+
+if CONFIG['MOZ_ENABLE_GIO']:
+    SOURCES += [
+        'nsGIOService.cpp',
+        'nsGSettingsService.cpp',
+        'nsPackageKitService.cpp'
+    ]
+
+FINAL_LIBRARY = 'xul'
+
+LOCAL_INCLUDES += [
+    '/toolkit/components/build/',
+]
+
+CXXFLAGS += CONFIG['MOZ_GCONF_CFLAGS']
+CXXFLAGS += CONFIG['MOZ_GIO_CFLAGS']
+CXXFLAGS += CONFIG['GLIB_CFLAGS']
+CXXFLAGS += CONFIG['MOZ_DBUS_GLIB_CFLAGS']
+
+if 'gtk' in CONFIG['MOZ_WIDGET_TOOLKIT']:
+    CXXFLAGS += CONFIG['TK_CFLAGS']
diff --git a/toolkit/system/gnome/nsAlertsIconListener.cpp b/toolkit/system/gnome/nsAlertsIconListener.cpp
new file mode 100644
index 000000000..b11672d30
--- /dev/null
+++ b/toolkit/system/gnome/nsAlertsIconListener.cpp
@@ -0,0 +1,327 @@
+/* -*- Mode: C++; 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 "nsAlertsIconListener.h"
+#include "imgIContainer.h"
+#include "imgIRequest.h"
+#include "nsNetUtil.h"
+#include "nsServiceManagerUtils.h"
+#include "nsSystemAlertsService.h"
+#include "nsIAlertsService.h"
+#include "nsICancelable.h"
+#include "nsIImageToPixbuf.h"
+#include "nsIStringBundle.h"
+#include "nsIObserverService.h"
+#include "nsIURI.h"
+#include "nsCRT.h"
+
+#include <dlfcn.h>
+#include <gdk/gdk.h>
+
+static bool gHasActions = false;
+static bool gHasCaps = false;
+
+void* nsAlertsIconListener::libNotifyHandle = nullptr;
+bool nsAlertsIconListener::libNotifyNotAvail = false;
+nsAlertsIconListener::notify_is_initted_t nsAlertsIconListener::notify_is_initted = nullptr;
+nsAlertsIconListener::notify_init_t nsAlertsIconListener::notify_init = nullptr;
+nsAlertsIconListener::notify_get_server_caps_t nsAlertsIconListener::notify_get_server_caps = nullptr;
+nsAlertsIconListener::notify_notification_new_t nsAlertsIconListener::notify_notification_new = nullptr;
+nsAlertsIconListener::notify_notification_show_t nsAlertsIconListener::notify_notification_show = nullptr;
+nsAlertsIconListener::notify_notification_set_icon_from_pixbuf_t nsAlertsIconListener::notify_notification_set_icon_from_pixbuf = nullptr;
+nsAlertsIconListener::notify_notification_add_action_t nsAlertsIconListener::notify_notification_add_action = nullptr;
+nsAlertsIconListener::notify_notification_close_t nsAlertsIconListener::notify_notification_close = nullptr;
+
+static void notify_action_cb(NotifyNotification *notification,
+                             gchar *action, gpointer user_data)
+{
+  nsAlertsIconListener* alert = static_cast<nsAlertsIconListener*> (user_data);
+  alert->SendCallback();
+}
+
+static void notify_closed_marshal(GClosure* closure,
+                                  GValue* return_value,
+                                  guint n_param_values,
+                                  const GValue* param_values,
+                                  gpointer invocation_hint,
+                                  gpointer marshal_data)
+{
+  MOZ_ASSERT(n_param_values >= 1, "No object in params");
+
+  nsAlertsIconListener* alert =
+    static_cast<nsAlertsIconListener*>(closure->data);
+  alert->SendClosed();
+  NS_RELEASE(alert);
+}
+
+static GdkPixbuf*
+GetPixbufFromImgRequest(imgIRequest* aRequest)
+{
+  nsCOMPtr<imgIContainer> image;
+  nsresult rv = aRequest->GetImage(getter_AddRefs(image));
+  if (NS_FAILED(rv)) {
+    return nullptr;
+  }
+
+  nsCOMPtr<nsIImageToPixbuf> imgToPixbuf =
+    do_GetService("@mozilla.org/widget/image-to-gdk-pixbuf;1");
+
+  return imgToPixbuf->ConvertImageToPixbuf(image);
+}
+
+NS_IMPL_ISUPPORTS(nsAlertsIconListener, nsIAlertNotificationImageListener,
+                  nsIObserver, nsISupportsWeakReference)
+
+nsAlertsIconListener::nsAlertsIconListener(nsSystemAlertsService* aBackend,
+                                           const nsAString& aAlertName)
+: mAlertName(aAlertName),
+  mBackend(aBackend),
+  mNotification(nullptr)
+{
+  if (!libNotifyHandle && !libNotifyNotAvail) {
+    libNotifyHandle = dlopen("libnotify.so.4", RTLD_LAZY);
+    if (!libNotifyHandle) {
+      libNotifyHandle = dlopen("libnotify.so.1", RTLD_LAZY);
+      if (!libNotifyHandle) {
+        libNotifyNotAvail = true;
+        return;
+      }
+    }
+
+    notify_is_initted = (notify_is_initted_t)dlsym(libNotifyHandle, "notify_is_initted");
+    notify_init = (notify_init_t)dlsym(libNotifyHandle, "notify_init");
+    notify_get_server_caps = (notify_get_server_caps_t)dlsym(libNotifyHandle, "notify_get_server_caps");
+    notify_notification_new = (notify_notification_new_t)dlsym(libNotifyHandle, "notify_notification_new");
+    notify_notification_show = (notify_notification_show_t)dlsym(libNotifyHandle, "notify_notification_show");
+    notify_notification_set_icon_from_pixbuf = (notify_notification_set_icon_from_pixbuf_t)dlsym(libNotifyHandle, "notify_notification_set_icon_from_pixbuf");
+    notify_notification_add_action = (notify_notification_add_action_t)dlsym(libNotifyHandle, "notify_notification_add_action");
+    notify_notification_close = (notify_notification_close_t)dlsym(libNotifyHandle, "notify_notification_close");
+    if (!notify_is_initted || !notify_init || !notify_get_server_caps || !notify_notification_new || !notify_notification_show || !notify_notification_set_icon_from_pixbuf || !notify_notification_add_action || !notify_notification_close) {
+      dlclose(libNotifyHandle);
+      libNotifyHandle = nullptr;
+    }
+  }
+}
+
+nsAlertsIconListener::~nsAlertsIconListener()
+{
+  mBackend->RemoveListener(mAlertName, this);
+  // Don't dlclose libnotify as it uses atexit().
+}
+
+NS_IMETHODIMP
+nsAlertsIconListener::OnImageMissing(nsISupports*)
+{
+  // This notification doesn't have an image, or there was an error getting
+  // the image. Show the notification without an icon.
+  return ShowAlert(nullptr);
+}
+
+NS_IMETHODIMP
+nsAlertsIconListener::OnImageReady(nsISupports*, imgIRequest* aRequest)
+{
+  GdkPixbuf* imagePixbuf = GetPixbufFromImgRequest(aRequest);
+  if (!imagePixbuf) {
+    ShowAlert(nullptr);
+  } else {
+    ShowAlert(imagePixbuf);
+    g_object_unref(imagePixbuf);
+  }
+
+  return NS_OK;
+}
+
+nsresult
+nsAlertsIconListener::ShowAlert(GdkPixbuf* aPixbuf)
+{
+  if (!mBackend->IsActiveListener(mAlertName, this))
+    return NS_OK;
+
+  mNotification = notify_notification_new(mAlertTitle.get(), mAlertText.get(),
+                                          nullptr, nullptr);
+
+  if (!mNotification)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  nsCOMPtr<nsIObserverService> obsServ =
+      do_GetService("@mozilla.org/observer-service;1");
+  if (obsServ)
+    obsServ->AddObserver(this, "quit-application", true);
+
+  if (aPixbuf)
+    notify_notification_set_icon_from_pixbuf(mNotification, aPixbuf);
+
+  NS_ADDREF(this);
+  if (mAlertHasAction) {
+    // What we put as the label doesn't matter here, if the action
+    // string is "default" then that makes the entire bubble clickable
+    // rather than creating a button.
+    notify_notification_add_action(mNotification, "default", "Activate",
+                                   notify_action_cb, this, nullptr);
+  }
+
+  // Fedora 10 calls NotifyNotification "closed" signal handlers with a
+  // different signature, so a marshaller is used instead of a C callback to
+  // get the user_data (this) in a parseable format.  |closure| is created
+  // with a floating reference, which gets sunk by g_signal_connect_closure().
+  GClosure* closure = g_closure_new_simple(sizeof(GClosure), this);
+  g_closure_set_marshal(closure, notify_closed_marshal);
+  mClosureHandler = g_signal_connect_closure(mNotification, "closed", closure, FALSE);
+  GError* error = nullptr;
+  if (!notify_notification_show(mNotification, &error)) {
+    NS_WARNING(error->message);
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  if (mAlertListener)
+    mAlertListener->Observe(nullptr, "alertshow", mAlertCookie.get());
+
+  return NS_OK;
+}
+
+void
+nsAlertsIconListener::SendCallback()
+{
+  if (mAlertListener)
+    mAlertListener->Observe(nullptr, "alertclickcallback", mAlertCookie.get());
+}
+
+void
+nsAlertsIconListener::SendClosed()
+{
+  if (mNotification) {
+    g_object_unref(mNotification);
+    mNotification = nullptr;
+  }
+  NotifyFinished();
+}
+
+NS_IMETHODIMP
+nsAlertsIconListener::Observe(nsISupports *aSubject, const char *aTopic,
+                              const char16_t *aData) {
+  // We need to close any open notifications upon application exit, otherwise
+  // we will leak since libnotify holds a ref for us.
+  if (!nsCRT::strcmp(aTopic, "quit-application") && mNotification) {
+    g_signal_handler_disconnect(mNotification, mClosureHandler);
+    g_object_unref(mNotification);
+    mNotification = nullptr;
+    Release(); // equivalent to NS_RELEASE(this)
+  }
+  return NS_OK;
+}
+
+nsresult
+nsAlertsIconListener::Close()
+{
+  if (mIconRequest) {
+    mIconRequest->Cancel(NS_BINDING_ABORTED);
+    mIconRequest = nullptr;
+  }
+
+  if (!mNotification) {
+    NotifyFinished();
+    return NS_OK;
+  }
+
+  GError* error = nullptr;
+  if (!notify_notification_close(mNotification, &error)) {
+    NS_WARNING(error->message);
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+nsresult
+nsAlertsIconListener::InitAlertAsync(nsIAlertNotification* aAlert,
+                                     nsIObserver* aAlertListener)
+{
+  if (!libNotifyHandle)
+    return NS_ERROR_FAILURE;
+
+  if (!notify_is_initted()) {
+    // Give the name of this application to libnotify
+    nsCOMPtr<nsIStringBundleService> bundleService = 
+      do_GetService(NS_STRINGBUNDLE_CONTRACTID);
+
+    nsAutoCString appShortName;
+    if (bundleService) {
+      nsCOMPtr<nsIStringBundle> bundle;
+      bundleService->CreateBundle("chrome://branding/locale/brand.properties",
+                                  getter_AddRefs(bundle));
+      nsAutoString appName;
+
+      if (bundle) {
+        bundle->GetStringFromName(u"brandShortName",
+                                  getter_Copies(appName));
+        appShortName = NS_ConvertUTF16toUTF8(appName);
+      } else {
+        NS_WARNING("brand.properties not present, using default application name");
+        appShortName.AssignLiteral("Mozilla");
+      }
+    } else {
+      appShortName.AssignLiteral("Mozilla");
+    }
+
+    if (!notify_init(appShortName.get()))
+      return NS_ERROR_FAILURE;
+
+    GList *server_caps = notify_get_server_caps();
+    if (server_caps) {
+      gHasCaps = true;
+      for (GList* cap = server_caps; cap != nullptr; cap = cap->next) {
+        if (!strcmp((char*) cap->data, "actions")) {
+          gHasActions = true;
+          break;
+        }
+      }
+      g_list_foreach(server_caps, (GFunc)g_free, nullptr);
+      g_list_free(server_caps);
+    }
+  }
+
+  if (!gHasCaps) {
+    // if notify_get_server_caps() failed above we need to assume
+    // there is no notification-server to display anything
+    return NS_ERROR_FAILURE;
+  }
+
+  nsresult rv = aAlert->GetTextClickable(&mAlertHasAction);
+  NS_ENSURE_SUCCESS(rv, rv);
+  if (!gHasActions && mAlertHasAction)
+    return NS_ERROR_FAILURE; // No good, fallback to XUL
+
+  nsAutoString title;
+  rv = aAlert->GetTitle(title);
+  NS_ENSURE_SUCCESS(rv, rv);
+  // Workaround for a libnotify bug - blank titles aren't dealt with
+  // properly so we use a space
+  if (title.IsEmpty()) {
+    mAlertTitle = NS_LITERAL_CSTRING(" ");
+  } else {
+    mAlertTitle = NS_ConvertUTF16toUTF8(title);
+  }
+
+  nsAutoString text;
+  rv = aAlert->GetText(text);
+  NS_ENSURE_SUCCESS(rv, rv);
+  mAlertText = NS_ConvertUTF16toUTF8(text);
+
+  mAlertListener = aAlertListener;
+
+  rv = aAlert->GetCookie(mAlertCookie);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  return aAlert->LoadImage(/* aTimeout = */ 0, this, /* aUserData = */ nullptr,
+                           getter_AddRefs(mIconRequest));
+}
+
+void nsAlertsIconListener::NotifyFinished()
+{
+  if (mAlertListener)
+    mAlertListener->Observe(nullptr, "alertfinished", mAlertCookie.get());
+}
diff --git a/toolkit/system/gnome/nsAlertsIconListener.h b/toolkit/system/gnome/nsAlertsIconListener.h
new file mode 100644
index 000000000..f3a745d33
--- /dev/null
+++ b/toolkit/system/gnome/nsAlertsIconListener.h
@@ -0,0 +1,91 @@
+/* -*- Mode: C++; 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/. */
+
+#ifndef nsAlertsIconListener_h__
+#define nsAlertsIconListener_h__
+
+#include "nsCOMPtr.h"
+#include "nsIAlertsService.h"
+#include "nsString.h"
+#include "nsIObserver.h"
+#include "nsWeakReference.h"
+
+#include <gdk-pixbuf/gdk-pixbuf.h>
+
+class nsIAlertNotification;
+class nsICancelable;
+class nsSystemAlertsService;
+
+struct NotifyNotification;
+
+class nsAlertsIconListener : public nsIAlertNotificationImageListener,
+                             public nsIObserver,
+                             public nsSupportsWeakReference
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIALERTNOTIFICATIONIMAGELISTENER
+  NS_DECL_NSIOBSERVER
+
+  nsAlertsIconListener(nsSystemAlertsService* aBackend,
+                       const nsAString& aAlertName);
+
+  nsresult InitAlertAsync(nsIAlertNotification* aAlert,
+                          nsIObserver* aAlertListener);
+  nsresult Close();
+
+  void SendCallback();
+  void SendClosed();
+
+protected:
+  virtual ~nsAlertsIconListener();
+
+  /**
+   * The only difference between libnotify.so.4 and libnotify.so.1 for these symbols
+   * is that notify_notification_new takes three arguments in libnotify.so.4 and
+   * four in libnotify.so.1.
+   * Passing the fourth argument as NULL is binary compatible.
+   */
+  typedef void (*NotifyActionCallback)(NotifyNotification*, char*, gpointer);
+  typedef bool (*notify_is_initted_t)(void);
+  typedef bool (*notify_init_t)(const char*);
+  typedef GList* (*notify_get_server_caps_t)(void);
+  typedef NotifyNotification* (*notify_notification_new_t)(const char*, const char*, const char*, const char*);
+  typedef bool (*notify_notification_show_t)(void*, GError**);
+  typedef void (*notify_notification_set_icon_from_pixbuf_t)(void*, GdkPixbuf*);
+  typedef void (*notify_notification_add_action_t)(void*, const char*, const char*, NotifyActionCallback, gpointer, GFreeFunc);
+  typedef bool (*notify_notification_close_t)(void*, GError**);
+
+  nsCOMPtr<nsICancelable> mIconRequest;
+  nsCString mAlertTitle;
+  nsCString mAlertText;
+
+  nsCOMPtr<nsIObserver> mAlertListener;
+  nsString mAlertCookie;
+  nsString mAlertName;
+
+  RefPtr<nsSystemAlertsService> mBackend;
+
+  bool mAlertHasAction;
+
+  static void* libNotifyHandle;
+  static bool libNotifyNotAvail;
+  static notify_is_initted_t notify_is_initted;
+  static notify_init_t notify_init;
+  static notify_get_server_caps_t notify_get_server_caps;
+  static notify_notification_new_t notify_notification_new;
+  static notify_notification_show_t notify_notification_show;
+  static notify_notification_set_icon_from_pixbuf_t notify_notification_set_icon_from_pixbuf;
+  static notify_notification_add_action_t notify_notification_add_action;
+  static notify_notification_close_t notify_notification_close;
+  NotifyNotification* mNotification;
+  gulong mClosureHandler;
+
+  nsresult ShowAlert(GdkPixbuf* aPixbuf);
+
+  void NotifyFinished();
+};
+
+#endif
diff --git a/toolkit/system/gnome/nsGConfService.cpp b/toolkit/system/gnome/nsGConfService.cpp
new file mode 100644
index 000000000..ede71e588
--- /dev/null
+++ b/toolkit/system/gnome/nsGConfService.cpp
@@ -0,0 +1,305 @@
+/* -*- Mode: C++; 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 "mozilla/ArrayUtils.h"
+#include "nsGConfService.h"
+#include "nsString.h"
+#include "nsCOMPtr.h"
+#include "nsComponentManagerUtils.h"
+#include "nsISupportsPrimitives.h"
+#include "nsIMutableArray.h"
+#include "prlink.h"
+
+#include <gconf/gconf-client.h>
+
+using namespace mozilla;
+
+#define GCONF_FUNCTIONS \
+  FUNC(gconf_client_get_default, GConfClient*, (void)) \
+  FUNC(gconf_client_get_bool, gboolean, (GConfClient*, const gchar*, GError**)) \
+  FUNC(gconf_client_get_string, gchar*, (GConfClient*, const gchar*, GError**)) \
+  FUNC(gconf_client_get_int, gint, (GConfClient*, const gchar*, GError**)) \
+  FUNC(gconf_client_get_float, gdouble, (GConfClient*, const gchar*, GError**)) \
+  FUNC(gconf_client_get_list, GSList*, (GConfClient*, const gchar*, GConfValueType, GError**)) \
+  FUNC(gconf_client_set_bool, gboolean, (GConfClient*, const gchar*, gboolean, GError**)) \
+  FUNC(gconf_client_set_string, gboolean, (GConfClient*, const gchar*, const gchar*, GError**)) \
+  FUNC(gconf_client_set_int, gboolean, (GConfClient*, const gchar*, gint, GError**)) \
+  FUNC(gconf_client_set_float, gboolean, (GConfClient*, const gchar*, gdouble, GError**)) \
+  FUNC(gconf_client_unset, gboolean, (GConfClient*, const gchar*, GError**))
+
+#define FUNC(name, type, params) \
+  typedef type (*_##name##_fn) params; \
+  static _##name##_fn _##name;
+
+GCONF_FUNCTIONS
+
+#undef FUNC
+
+#define gconf_client_get_default _gconf_client_get_default
+#define gconf_client_get_bool _gconf_client_get_bool
+#define gconf_client_get_string _gconf_client_get_string
+#define gconf_client_get_int _gconf_client_get_int
+#define gconf_client_get_float _gconf_client_get_float
+#define gconf_client_get_list _gconf_client_get_list
+#define gconf_client_set_bool _gconf_client_set_bool
+#define gconf_client_set_string _gconf_client_set_string
+#define gconf_client_set_int _gconf_client_set_int
+#define gconf_client_set_float _gconf_client_set_float
+#define gconf_client_unset _gconf_client_unset
+
+static PRLibrary *gconfLib = nullptr;
+
+typedef void (*nsGConfFunc)();
+struct nsGConfDynamicFunction {
+  const char *functionName;
+  nsGConfFunc *function;
+};
+
+nsGConfService::~nsGConfService()
+{
+  if (mClient)
+    g_object_unref(mClient);
+
+  // We don't unload gconf here because liborbit uses atexit(). In addition to
+  // this, it's not a good idea to unload any gobject based library, as it
+  // leaves types registered in glib's type system
+}
+
+nsresult
+nsGConfService::Init()
+{
+#define FUNC(name, type, params) { #name, (nsGConfFunc *)&_##name },
+  static const nsGConfDynamicFunction kGConfSymbols[] = {
+    GCONF_FUNCTIONS
+  };
+#undef FUNC
+
+  if (!gconfLib) {
+    gconfLib = PR_LoadLibrary("libgconf-2.so.4");
+    if (!gconfLib)
+      return NS_ERROR_FAILURE;
+  }
+
+  for (uint32_t i = 0; i < ArrayLength(kGConfSymbols); i++) {
+    *kGConfSymbols[i].function =
+      PR_FindFunctionSymbol(gconfLib, kGConfSymbols[i].functionName);
+    if (!*kGConfSymbols[i].function) {
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  mClient = gconf_client_get_default();
+  return mClient ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMPL_ISUPPORTS(nsGConfService, nsIGConfService)
+
+NS_IMETHODIMP
+nsGConfService::GetBool(const nsACString &aKey, bool *aResult)
+{
+  GError* error = nullptr;
+  *aResult = gconf_client_get_bool(mClient, PromiseFlatCString(aKey).get(),
+                                   &error);
+
+  if (error) {
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGConfService::GetString(const nsACString &aKey, nsACString &aResult)
+{
+  GError* error = nullptr;
+  gchar *result = gconf_client_get_string(mClient,
+                                          PromiseFlatCString(aKey).get(),
+                                          &error);
+
+  if (error) {
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  // We do a string copy here so that the caller doesn't need to worry about
+  // freeing the string with g_free().
+
+  aResult.Assign(result);
+  g_free(result);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGConfService::GetInt(const nsACString &aKey, int32_t* aResult)
+{
+  GError* error = nullptr;
+  *aResult = gconf_client_get_int(mClient, PromiseFlatCString(aKey).get(),
+                                  &error);
+
+  if (error) {
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGConfService::GetFloat(const nsACString &aKey, float* aResult)
+{
+  GError* error = nullptr;
+  *aResult = gconf_client_get_float(mClient, PromiseFlatCString(aKey).get(),
+                                    &error);
+
+  if (error) {
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGConfService::GetStringList(const nsACString &aKey, nsIArray** aResult)
+{
+  nsCOMPtr<nsIMutableArray> items(do_CreateInstance(NS_ARRAY_CONTRACTID));
+  if (!items)
+    return NS_ERROR_OUT_OF_MEMORY;
+    
+  GError* error = nullptr;
+  GSList* list = gconf_client_get_list(mClient, PromiseFlatCString(aKey).get(),
+                                       GCONF_VALUE_STRING, &error);
+  if (error) {
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  for (GSList* l = list; l; l = l->next) {
+    nsCOMPtr<nsISupportsString> obj(do_CreateInstance(NS_SUPPORTS_STRING_CONTRACTID));
+    if (!obj) {
+      g_slist_free(list);
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+    obj->SetData(NS_ConvertUTF8toUTF16((const char*)l->data));
+    items->AppendElement(obj, false);
+    g_free(l->data);
+  }
+  
+  g_slist_free(list);
+  items.forget(aResult);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGConfService::SetBool(const nsACString &aKey, bool aValue)
+{
+  bool res = gconf_client_set_bool(mClient, PromiseFlatCString(aKey).get(),
+                                     aValue, nullptr);
+
+  return res ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsGConfService::SetString(const nsACString &aKey, const nsACString &aValue)
+{
+  bool res = gconf_client_set_string(mClient, PromiseFlatCString(aKey).get(),
+                                       PromiseFlatCString(aValue).get(),
+                                       nullptr);
+
+  return res ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsGConfService::SetInt(const nsACString &aKey, int32_t aValue)
+{
+  bool res = gconf_client_set_int(mClient, PromiseFlatCString(aKey).get(),
+                                    aValue, nullptr);
+
+  return res ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsGConfService::SetFloat(const nsACString &aKey, float aValue)
+{
+  bool res = gconf_client_set_float(mClient, PromiseFlatCString(aKey).get(),
+                                      aValue, nullptr);
+
+  return res ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsGConfService::GetAppForProtocol(const nsACString &aScheme, bool *aEnabled,
+                                  nsACString &aHandler)
+{
+  nsAutoCString key("/desktop/gnome/url-handlers/");
+  key.Append(aScheme);
+  key.AppendLiteral("/command");
+
+  GError *err = nullptr;
+  gchar *command = gconf_client_get_string(mClient, key.get(), &err);
+  if (!err && command) {
+    key.Replace(key.Length() - 7, 7, NS_LITERAL_CSTRING("enabled"));
+    *aEnabled = gconf_client_get_bool(mClient, key.get(), &err);
+  } else {
+    *aEnabled = false;
+  }
+
+  aHandler.Assign(command);
+  g_free(command);
+
+  if (err) {
+    g_error_free(err);
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGConfService::HandlerRequiresTerminal(const nsACString &aScheme,
+                                        bool *aResult)
+{
+  nsAutoCString key("/desktop/gnome/url-handlers/");
+  key.Append(aScheme);
+  key.AppendLiteral("/requires_terminal");
+
+  GError *err = nullptr;
+  *aResult = gconf_client_get_bool(mClient, key.get(), &err);
+  if (err) {
+    g_error_free(err);
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGConfService::SetAppForProtocol(const nsACString &aScheme,
+                                  const nsACString &aCommand)
+{
+  nsAutoCString key("/desktop/gnome/url-handlers/");
+  key.Append(aScheme);
+  key.AppendLiteral("/command");
+
+  bool res = gconf_client_set_string(mClient, key.get(),
+                                       PromiseFlatCString(aCommand).get(),
+                                       nullptr);
+  if (res) {
+    key.Replace(key.Length() - 7, 7, NS_LITERAL_CSTRING("enabled"));
+    res = gconf_client_set_bool(mClient, key.get(), true, nullptr);
+    if (res) {
+      key.Replace(key.Length() - 7, 7, NS_LITERAL_CSTRING("needs_terminal"));
+      res = gconf_client_set_bool(mClient, key.get(), false, nullptr);
+      if (res) {
+        key.Replace(key.Length() - 14, 14, NS_LITERAL_CSTRING("command-id"));
+        res = gconf_client_unset(mClient, key.get(), nullptr);
+      }
+    }
+  }
+
+  return res ? NS_OK : NS_ERROR_FAILURE;
+}
diff --git a/toolkit/system/gnome/nsGConfService.h b/toolkit/system/gnome/nsGConfService.h
new file mode 100644
index 000000000..4e500a40d
--- /dev/null
+++ b/toolkit/system/gnome/nsGConfService.h
@@ -0,0 +1,31 @@
+/* -*- Mode: C++; 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/. */
+
+#ifndef nsGConfService_h_
+#define nsGConfService_h_
+
+#include "nsIGConfService.h"
+#include "gconf/gconf-client.h"
+#include "mozilla/Attributes.h"
+
+#define NS_GCONFSERVICE_CID \
+{0xd96d5985, 0xa13a, 0x4bdc, {0x93, 0x86, 0xef, 0x34, 0x8d, 0x7a, 0x97, 0xa1}}
+
+class nsGConfService final : public nsIGConfService
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIGCONFSERVICE
+
+  nsGConfService() : mClient(nullptr) {}
+  nsresult Init();
+
+private:
+  ~nsGConfService();
+
+  GConfClient *mClient;
+};
+
+#endif
diff --git a/toolkit/system/gnome/nsGIOService.cpp b/toolkit/system/gnome/nsGIOService.cpp
new file mode 100644
index 000000000..9196c7d76
--- /dev/null
+++ b/toolkit/system/gnome/nsGIOService.cpp
@@ -0,0 +1,475 @@
+/* -*- Mode: C++; 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 "nsGIOService.h"
+#include "nsString.h"
+#include "nsIURI.h"
+#include "nsTArray.h"
+#include "nsIStringEnumerator.h"
+#include "nsAutoPtr.h"
+
+#include <gio/gio.h>
+#include <gtk/gtk.h>
+#ifdef MOZ_ENABLE_DBUS
+#include <dbus/dbus-glib.h>
+#include <dbus/dbus-glib-lowlevel.h>
+#endif
+
+
+class nsGIOMimeApp final : public nsIGIOMimeApp
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIGIOMIMEAPP
+
+  explicit nsGIOMimeApp(GAppInfo* aApp) : mApp(aApp) {}
+
+private:
+  ~nsGIOMimeApp() { g_object_unref(mApp); }
+
+  GAppInfo *mApp;
+};
+
+NS_IMPL_ISUPPORTS(nsGIOMimeApp, nsIGIOMimeApp)
+
+NS_IMETHODIMP
+nsGIOMimeApp::GetId(nsACString& aId)
+{
+  aId.Assign(g_app_info_get_id(mApp));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOMimeApp::GetName(nsACString& aName)
+{
+  aName.Assign(g_app_info_get_name(mApp));
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOMimeApp::GetCommand(nsACString& aCommand)
+{
+  const char *cmd = g_app_info_get_commandline(mApp);
+  if (!cmd)
+    return NS_ERROR_FAILURE;
+  aCommand.Assign(cmd);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOMimeApp::GetExpectsURIs(int32_t* aExpects)
+{
+  *aExpects = g_app_info_supports_uris(mApp);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOMimeApp::Launch(const nsACString& aUri)
+{
+  GList uris = { 0 };
+  nsPromiseFlatCString flatUri(aUri);
+  uris.data = const_cast<char*>(flatUri.get());
+
+  GError *error = nullptr;
+  gboolean result = g_app_info_launch_uris(mApp, &uris, nullptr, &error);
+
+  if (!result) {
+    g_warning("Cannot launch application: %s", error->message);
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+class GIOUTF8StringEnumerator final : public nsIUTF8StringEnumerator
+{
+  ~GIOUTF8StringEnumerator() { }
+
+public:
+  GIOUTF8StringEnumerator() : mIndex(0) { }
+
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIUTF8STRINGENUMERATOR
+
+  nsTArray<nsCString> mStrings;
+  uint32_t            mIndex;
+};
+
+NS_IMPL_ISUPPORTS(GIOUTF8StringEnumerator, nsIUTF8StringEnumerator)
+
+NS_IMETHODIMP
+GIOUTF8StringEnumerator::HasMore(bool* aResult)
+{
+  *aResult = mIndex < mStrings.Length();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GIOUTF8StringEnumerator::GetNext(nsACString& aResult)
+{
+  if (mIndex >= mStrings.Length())
+    return NS_ERROR_UNEXPECTED;
+
+  aResult.Assign(mStrings[mIndex]);
+  ++mIndex;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOMimeApp::GetSupportedURISchemes(nsIUTF8StringEnumerator** aSchemes)
+{
+  *aSchemes = nullptr;
+
+  RefPtr<GIOUTF8StringEnumerator> array = new GIOUTF8StringEnumerator();
+  NS_ENSURE_TRUE(array, NS_ERROR_OUT_OF_MEMORY);
+
+  GVfs *gvfs = g_vfs_get_default();
+
+  if (!gvfs) {
+    g_warning("Cannot get GVfs object.");
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  const gchar* const * uri_schemes = g_vfs_get_supported_uri_schemes(gvfs);
+
+  while (*uri_schemes != nullptr) {
+    if (!array->mStrings.AppendElement(*uri_schemes)) {
+      return NS_ERROR_OUT_OF_MEMORY;
+    }
+    uri_schemes++;
+  }
+
+  array.forget(aSchemes);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOMimeApp::SetAsDefaultForMimeType(nsACString const& aMimeType)
+{
+  char *content_type =
+    g_content_type_from_mime_type(PromiseFlatCString(aMimeType).get());
+  if (!content_type)
+    return NS_ERROR_FAILURE;
+  GError *error = nullptr;
+  g_app_info_set_as_default_for_type(mApp,
+                                     content_type,
+                                     &error);
+  if (error) {
+    g_warning("Cannot set application as default for MIME type (%s): %s",
+              PromiseFlatCString(aMimeType).get(),
+              error->message);
+    g_error_free(error);
+    g_free(content_type);
+    return NS_ERROR_FAILURE;
+  }
+
+  g_free(content_type);
+  return NS_OK;
+}
+/**
+ * Set default application for files with given extensions
+ * @param fileExts string of space separated extensions
+ * @return NS_OK when application was set as default for given extensions,
+ * NS_ERROR_FAILURE otherwise
+ */
+NS_IMETHODIMP
+nsGIOMimeApp::SetAsDefaultForFileExtensions(nsACString const& fileExts)
+{
+  GError *error = nullptr;
+  char *extensions = g_strdup(PromiseFlatCString(fileExts).get());
+  char *ext_pos = extensions;
+  char *space_pos;
+
+  while ( (space_pos = strchr(ext_pos, ' ')) || (*ext_pos != '\0') ) {
+    if (space_pos) {
+      *space_pos = '\0';
+    }
+    g_app_info_set_as_default_for_extension(mApp, ext_pos, &error);
+    if (error) {
+      g_warning("Cannot set application as default for extension (%s): %s",
+                ext_pos,
+                error->message);
+      g_error_free(error);
+      g_free(extensions);
+      return NS_ERROR_FAILURE;
+    }
+    if (space_pos) {
+      ext_pos = space_pos + 1;
+    } else {
+      *ext_pos = '\0';
+    }
+  }
+  g_free(extensions);
+  return NS_OK;
+}
+
+/**
+ * Set default application for URI's of a particular scheme
+ * @param aURIScheme string containing the URI scheme
+ * @return NS_OK when application was set as default for URI scheme,
+ * NS_ERROR_FAILURE otherwise
+ */
+NS_IMETHODIMP
+nsGIOMimeApp::SetAsDefaultForURIScheme(nsACString const& aURIScheme)
+{
+  GError *error = nullptr;
+  nsAutoCString contentType("x-scheme-handler/");
+  contentType.Append(aURIScheme);
+
+  g_app_info_set_as_default_for_type(mApp,
+                                     contentType.get(),
+                                     &error);
+  if (error) {
+    g_warning("Cannot set application as default for URI scheme (%s): %s",
+              PromiseFlatCString(aURIScheme).get(),
+              error->message);
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(nsGIOService, nsIGIOService)
+
+NS_IMETHODIMP
+nsGIOService::GetMimeTypeFromExtension(const nsACString& aExtension,
+                                             nsACString& aMimeType)
+{
+  nsAutoCString fileExtToUse("file.");
+  fileExtToUse.Append(aExtension);
+
+  gboolean result_uncertain;
+  char *content_type = g_content_type_guess(fileExtToUse.get(),
+                                            nullptr,
+                                            0,
+                                            &result_uncertain);
+  if (!content_type)
+    return NS_ERROR_FAILURE;
+
+  char *mime_type = g_content_type_get_mime_type(content_type);
+  if (!mime_type) {
+    g_free(content_type);
+    return NS_ERROR_FAILURE;
+  }
+
+  aMimeType.Assign(mime_type);
+
+  g_free(mime_type);
+  g_free(content_type);
+
+  return NS_OK;
+}
+// used in nsGNOMERegistry
+// -----------------------------------------------------------------------------
+NS_IMETHODIMP
+nsGIOService::GetAppForURIScheme(const nsACString& aURIScheme,
+                                 nsIGIOMimeApp** aApp)
+{
+  *aApp = nullptr;
+
+  GAppInfo *app_info = g_app_info_get_default_for_uri_scheme(
+                          PromiseFlatCString(aURIScheme).get());
+  if (app_info) {
+    nsGIOMimeApp *mozApp = new nsGIOMimeApp(app_info);
+    NS_ADDREF(*aApp = mozApp);
+  } else {
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOService::GetAppForMimeType(const nsACString& aMimeType,
+                                nsIGIOMimeApp**   aApp)
+{
+  *aApp = nullptr;
+  char *content_type =
+    g_content_type_from_mime_type(PromiseFlatCString(aMimeType).get());
+  if (!content_type)
+    return NS_ERROR_FAILURE;
+
+  GAppInfo *app_info = g_app_info_get_default_for_type(content_type, false);
+  if (app_info) {
+    nsGIOMimeApp *mozApp = new nsGIOMimeApp(app_info);
+    NS_ENSURE_TRUE(mozApp, NS_ERROR_OUT_OF_MEMORY);
+    NS_ADDREF(*aApp = mozApp);
+  } else {
+    g_free(content_type);
+    return NS_ERROR_FAILURE;
+  }
+  g_free(content_type);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOService::GetDescriptionForMimeType(const nsACString& aMimeType,
+                                              nsACString& aDescription)
+{
+  char *content_type =
+    g_content_type_from_mime_type(PromiseFlatCString(aMimeType).get());
+  if (!content_type)
+    return NS_ERROR_FAILURE;
+
+  char *desc = g_content_type_get_description(content_type);
+  if (!desc) {
+    g_free(content_type);
+    return NS_ERROR_FAILURE;
+  }
+
+  aDescription.Assign(desc);
+  g_free(content_type);
+  g_free(desc);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOService::ShowURI(nsIURI* aURI)
+{
+  nsAutoCString spec;
+  nsresult rv = aURI->GetSpec(spec);
+  NS_ENSURE_SUCCESS(rv, rv);
+  GError *error = nullptr;
+  if (!g_app_info_launch_default_for_uri(spec.get(), nullptr, &error)) {
+    g_warning("Could not launch default application for URI: %s", error->message);
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGIOService::ShowURIForInput(const nsACString& aUri)
+{
+  GFile *file = g_file_new_for_commandline_arg(PromiseFlatCString(aUri).get());
+  char* spec = g_file_get_uri(file);
+  nsresult rv = NS_ERROR_FAILURE;
+  GError *error = nullptr;
+
+  g_app_info_launch_default_for_uri(spec, nullptr, &error);
+  if (error) {
+    g_warning("Cannot launch default application: %s", error->message);
+    g_error_free(error);
+  } else {
+    rv = NS_OK;
+  }
+  g_object_unref(file);
+  g_free(spec);
+
+  return rv;
+}
+
+NS_IMETHODIMP
+nsGIOService::OrgFreedesktopFileManager1ShowItems(const nsACString& aPath)
+{
+#ifndef MOZ_ENABLE_DBUS
+  return NS_ERROR_FAILURE;
+#else
+  GError* error = nullptr;
+  static bool org_freedesktop_FileManager1_exists = true;
+
+  if (!org_freedesktop_FileManager1_exists) {
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  DBusGConnection* dbusGConnection = dbus_g_bus_get(DBUS_BUS_SESSION, &error);
+
+  if (!dbusGConnection) {
+    if (error) {
+      g_printerr("Failed to open connection to session bus: %s\n", error->message);
+      g_error_free(error);
+    }
+    return NS_ERROR_FAILURE;
+  }
+
+  char *uri = g_filename_to_uri(PromiseFlatCString(aPath).get(), nullptr, nullptr);
+  if (uri == nullptr) {
+    return NS_ERROR_FAILURE;
+  }
+
+  DBusConnection* dbusConnection = dbus_g_connection_get_connection(dbusGConnection);
+  // Make sure we do not exit the entire program if DBus connection get lost.
+  dbus_connection_set_exit_on_disconnect(dbusConnection, false);
+
+  DBusGProxy* dbusGProxy = dbus_g_proxy_new_for_name(dbusGConnection,
+                                                     "org.freedesktop.FileManager1",
+                                                     "/org/freedesktop/FileManager1",
+                                                     "org.freedesktop.FileManager1");
+
+  const char *uris[2] = { uri, nullptr };
+  gboolean rv_dbus_call = dbus_g_proxy_call (dbusGProxy, "ShowItems", nullptr, G_TYPE_STRV, uris,
+                                             G_TYPE_STRING, "", G_TYPE_INVALID, G_TYPE_INVALID);
+
+  g_object_unref(dbusGProxy);
+  dbus_g_connection_unref(dbusGConnection);
+  g_free(uri);
+
+  if (!rv_dbus_call) {
+    org_freedesktop_FileManager1_exists = false;
+    return NS_ERROR_NOT_AVAILABLE;
+  }
+
+  return NS_OK;
+#endif
+}
+
+/**
+ * Create or find already existing application info for specified command
+ * and application name.
+ * @param cmd command to execute
+ * @param appName application name
+ * @param appInfo location where created GAppInfo is stored
+ * @return NS_OK when object is created, NS_ERROR_FAILURE otherwise.
+ */
+NS_IMETHODIMP
+nsGIOService::CreateAppFromCommand(nsACString const& cmd,
+                                   nsACString const& appName,
+                                   nsIGIOMimeApp**   appInfo)
+{
+  GError *error = nullptr;
+  *appInfo = nullptr;
+
+  GAppInfo *app_info = nullptr, *app_info_from_list = nullptr;
+  GList *apps = g_app_info_get_all();
+  GList *apps_p = apps;
+
+  // Try to find relevant and existing GAppInfo in all installed application
+  // We do this by comparing each GAppInfo's executable with out own
+  while (apps_p) {
+    app_info_from_list = (GAppInfo*) apps_p->data;
+    if (!app_info) {
+      // If the executable is not absolute, get it's full path
+      char *executable = g_find_program_in_path(g_app_info_get_executable(app_info_from_list));
+
+      if (executable && strcmp(executable, PromiseFlatCString(cmd).get()) == 0) {
+        g_object_ref (app_info_from_list);
+        app_info = app_info_from_list;
+      }
+      g_free(executable);
+    }
+
+    g_object_unref(app_info_from_list);
+    apps_p = apps_p->next;
+  }
+  g_list_free(apps);
+
+  if (!app_info) {
+    app_info = g_app_info_create_from_commandline(PromiseFlatCString(cmd).get(),
+                                                  PromiseFlatCString(appName).get(),
+                                                  G_APP_INFO_CREATE_SUPPORTS_URIS,
+                                                  &error);
+  }
+
+  if (!app_info) {
+    g_warning("Cannot create application info from command: %s", error->message);
+    g_error_free(error);
+    return NS_ERROR_FAILURE;
+  }
+  nsGIOMimeApp *mozApp = new nsGIOMimeApp(app_info);
+  NS_ENSURE_TRUE(mozApp, NS_ERROR_OUT_OF_MEMORY);
+  NS_ADDREF(*appInfo = mozApp);
+  return NS_OK;
+}
diff --git a/toolkit/system/gnome/nsGIOService.h b/toolkit/system/gnome/nsGIOService.h
new file mode 100644
index 000000000..2ae7a7e1a
--- /dev/null
+++ b/toolkit/system/gnome/nsGIOService.h
@@ -0,0 +1,24 @@
+/* -*- Mode: C++; 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/. */
+
+#ifndef nsGIOService_h_
+#define nsGIOService_h_
+
+#include "nsIGIOService.h"
+
+#define NS_GIOSERVICE_CID \
+{0xe3a1f3c9, 0x3ae1, 0x4b40, {0xa5, 0xe0, 0x7b, 0x45, 0x7f, 0xc9, 0xa9, 0xad}}
+
+class nsGIOService final : public nsIGIOService
+{
+  ~nsGIOService() {}
+
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIGIOSERVICE
+};
+
+#endif
+
diff --git a/toolkit/system/gnome/nsGSettingsService.cpp b/toolkit/system/gnome/nsGSettingsService.cpp
new file mode 100644
index 000000000..d8c46b4fe
--- /dev/null
+++ b/toolkit/system/gnome/nsGSettingsService.cpp
@@ -0,0 +1,350 @@
+/* -*- Mode: C++; 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 "mozilla/ArrayUtils.h"
+
+#include "nsGSettingsService.h"
+#include "nsString.h"
+#include "nsCOMPtr.h"
+#include "nsMemory.h"
+#include "prlink.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIMutableArray.h"
+#include "nsISupportsPrimitives.h"
+
+#include <glib.h>
+#include <glib-object.h>
+
+using namespace mozilla;
+
+typedef struct _GSettings GSettings;
+typedef struct _GVariantType GVariantType;
+typedef struct _GVariant GVariant;
+
+#ifndef G_VARIANT_TYPE_INT32
+# define G_VARIANT_TYPE_INT32        ((const GVariantType *) "i")
+# define G_VARIANT_TYPE_BOOLEAN      ((const GVariantType *) "b")
+# define G_VARIANT_TYPE_STRING       ((const GVariantType *) "s")
+# define G_VARIANT_TYPE_OBJECT_PATH  ((const GVariantType *) "o")
+# define G_VARIANT_TYPE_SIGNATURE    ((const GVariantType *) "g")
+#endif
+#ifndef G_VARIANT_TYPE_STRING_ARRAY
+# define G_VARIANT_TYPE_STRING_ARRAY ((const GVariantType *) "as")
+#endif
+
+#define GSETTINGS_FUNCTIONS \
+  FUNC(g_settings_new, GSettings *, (const char* schema)) \
+  FUNC(g_settings_list_schemas, const char * const *, (void)) \
+  FUNC(g_settings_list_keys, char **, (GSettings* settings)) \
+  FUNC(g_settings_get_value, GVariant *, (GSettings* settings, const char* key)) \
+  FUNC(g_settings_set_value, gboolean, (GSettings* settings, const char* key, GVariant* value)) \
+  FUNC(g_settings_range_check, gboolean, (GSettings* settings, const char* key, GVariant* value)) \
+  FUNC(g_variant_get_int32, gint32, (GVariant* variant)) \
+  FUNC(g_variant_get_boolean, gboolean, (GVariant* variant)) \
+  FUNC(g_variant_get_string, const char *, (GVariant* value, gsize* length)) \
+  FUNC(g_variant_get_strv, const char **, (GVariant* value, gsize* length)) \
+  FUNC(g_variant_is_of_type, gboolean, (GVariant* value, const GVariantType* type)) \
+  FUNC(g_variant_new_int32, GVariant *, (gint32 value)) \
+  FUNC(g_variant_new_boolean, GVariant *, (gboolean value)) \
+  FUNC(g_variant_new_string, GVariant *, (const char* string)) \
+  FUNC(g_variant_unref, void, (GVariant* value))
+
+#define FUNC(name, type, params) \
+  typedef type (*_##name##_fn) params; \
+  static _##name##_fn _##name;
+
+GSETTINGS_FUNCTIONS
+
+#undef FUNC
+
+#define g_settings_new _g_settings_new
+#define g_settings_list_schemas _g_settings_list_schemas
+#define g_settings_list_keys _g_settings_list_keys
+#define g_settings_get_value _g_settings_get_value
+#define g_settings_set_value _g_settings_set_value
+#define g_settings_range_check _g_settings_range_check
+#define g_variant_get_int32 _g_variant_get_int32
+#define g_variant_get_boolean _g_variant_get_boolean
+#define g_variant_get_string _g_variant_get_string
+#define g_variant_get_strv _g_variant_get_strv
+#define g_variant_is_of_type _g_variant_is_of_type
+#define g_variant_new_int32 _g_variant_new_int32
+#define g_variant_new_boolean _g_variant_new_boolean
+#define g_variant_new_string _g_variant_new_string
+#define g_variant_unref _g_variant_unref
+
+static PRLibrary *gioLib = nullptr;
+
+class nsGSettingsCollection final : public nsIGSettingsCollection
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIGSETTINGSCOLLECTION
+
+  explicit nsGSettingsCollection(GSettings* aSettings) : mSettings(aSettings),
+                                                         mKeys(nullptr) {}
+private:
+  ~nsGSettingsCollection();
+
+  bool KeyExists(const nsACString& aKey);
+  bool SetValue(const nsACString& aKey,
+                  GVariant *aValue);
+
+  GSettings *mSettings;
+  char **mKeys;
+};
+
+nsGSettingsCollection::~nsGSettingsCollection()
+{
+  g_strfreev(mKeys);
+  g_object_unref(mSettings);
+}
+
+bool
+nsGSettingsCollection::KeyExists(const nsACString& aKey)
+{
+  if (!mKeys)
+    mKeys = g_settings_list_keys(mSettings);
+
+  for (uint32_t i = 0; mKeys[i] != nullptr; i++) {
+    if (aKey.Equals(mKeys[i]))
+      return true;
+  }
+
+  return false;
+}
+
+bool
+nsGSettingsCollection::SetValue(const nsACString& aKey,
+                                GVariant *aValue)
+{
+  if (!KeyExists(aKey) ||
+      !g_settings_range_check(mSettings,
+                              PromiseFlatCString(aKey).get(),
+                              aValue)) {
+    g_variant_unref(aValue);
+    return false;
+  }
+
+  return g_settings_set_value(mSettings,
+                              PromiseFlatCString(aKey).get(),
+                              aValue);
+}
+
+NS_IMPL_ISUPPORTS(nsGSettingsCollection, nsIGSettingsCollection)
+
+NS_IMETHODIMP
+nsGSettingsCollection::SetString(const nsACString& aKey,
+                                 const nsACString& aValue)
+{
+  GVariant *value = g_variant_new_string(PromiseFlatCString(aValue).get());
+  if (!value)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  bool res = SetValue(aKey, value);
+
+  return res ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsGSettingsCollection::SetBoolean(const nsACString& aKey,
+                                  bool aValue)
+{
+  GVariant *value = g_variant_new_boolean(aValue);
+  if (!value)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  bool res = SetValue(aKey, value);
+
+  return res ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsGSettingsCollection::SetInt(const nsACString& aKey,
+                              int32_t aValue)
+{
+  GVariant *value = g_variant_new_int32(aValue);
+  if (!value)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  bool res = SetValue(aKey, value);
+
+  return res ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsGSettingsCollection::GetString(const nsACString& aKey,
+                                 nsACString& aResult)
+{
+  if (!KeyExists(aKey))
+    return NS_ERROR_INVALID_ARG;
+
+  GVariant *value = g_settings_get_value(mSettings,
+                                         PromiseFlatCString(aKey).get());
+  if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING) &&
+      !g_variant_is_of_type(value, G_VARIANT_TYPE_OBJECT_PATH) &&
+      !g_variant_is_of_type(value, G_VARIANT_TYPE_SIGNATURE)) {
+    g_variant_unref(value);
+    return NS_ERROR_FAILURE;
+  }
+
+  aResult.Assign(g_variant_get_string(value, nullptr));
+  g_variant_unref(value);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGSettingsCollection::GetBoolean(const nsACString& aKey,
+                                  bool* aResult)
+{
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  if (!KeyExists(aKey))
+    return NS_ERROR_INVALID_ARG;
+
+  GVariant *value = g_settings_get_value(mSettings,
+                                         PromiseFlatCString(aKey).get());
+  if (!g_variant_is_of_type(value, G_VARIANT_TYPE_BOOLEAN)) {
+    g_variant_unref(value);
+    return NS_ERROR_FAILURE;
+  }
+
+  gboolean res = g_variant_get_boolean(value);
+  *aResult = res ? true : false;
+  g_variant_unref(value);
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsGSettingsCollection::GetInt(const nsACString& aKey,
+                              int32_t* aResult)
+{
+  NS_ENSURE_ARG_POINTER(aResult);
+
+  if (!KeyExists(aKey))
+    return NS_ERROR_INVALID_ARG;
+
+  GVariant *value = g_settings_get_value(mSettings,
+                                         PromiseFlatCString(aKey).get());
+  if (!g_variant_is_of_type(value, G_VARIANT_TYPE_INT32)) {
+    g_variant_unref(value);
+    return NS_ERROR_FAILURE;
+  }
+
+  *aResult = g_variant_get_int32(value);
+  g_variant_unref(value);
+
+  return NS_OK;
+}
+
+// These types are local to nsGSettingsService::Init, but ISO C++98 doesn't
+// allow a template (ArrayLength) to be instantiated based on a local type.
+// Boo-urns!
+typedef void (*nsGSettingsFunc)();
+struct nsGSettingsDynamicFunction {
+  const char *functionName;
+  nsGSettingsFunc *function;
+};
+
+NS_IMETHODIMP
+nsGSettingsCollection::GetStringList(const nsACString& aKey, nsIArray** aResult)
+{
+  if (!KeyExists(aKey))
+    return NS_ERROR_INVALID_ARG;
+
+  nsCOMPtr<nsIMutableArray> items(do_CreateInstance(NS_ARRAY_CONTRACTID));
+  if (!items) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  GVariant *value = g_settings_get_value(mSettings,
+                                         PromiseFlatCString(aKey).get());
+
+  if (!g_variant_is_of_type(value, G_VARIANT_TYPE_STRING_ARRAY)) {
+    g_variant_unref(value);
+    return NS_ERROR_FAILURE;
+  }
+
+  const gchar ** gs_strings = g_variant_get_strv(value, nullptr);
+  if (!gs_strings) {
+    // empty array
+    items.forget(aResult);
+    g_variant_unref(value);
+    return NS_OK;
+  }
+
+  const gchar** p_gs_strings = gs_strings;
+  while (*p_gs_strings != nullptr)
+  {
+    nsCOMPtr<nsISupportsCString> obj(do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID));
+    if (obj) {
+      obj->SetData(nsDependentCString(*p_gs_strings));
+      items->AppendElement(obj, false);
+    }
+    p_gs_strings++;
+  }
+  g_free(gs_strings);
+  items.forget(aResult);
+  g_variant_unref(value);
+  return NS_OK;
+}
+
+nsresult
+nsGSettingsService::Init()
+{
+#define FUNC(name, type, params) { #name, (nsGSettingsFunc *)&_##name },
+  static const nsGSettingsDynamicFunction kGSettingsSymbols[] = {
+    GSETTINGS_FUNCTIONS
+  };
+#undef FUNC
+
+  if (!gioLib) {
+    gioLib = PR_LoadLibrary("libgio-2.0.so.0");
+    if (!gioLib)
+      return NS_ERROR_FAILURE;
+  }
+
+  for (uint32_t i = 0; i < ArrayLength(kGSettingsSymbols); i++) {
+    *kGSettingsSymbols[i].function =
+      PR_FindFunctionSymbol(gioLib, kGSettingsSymbols[i].functionName);
+    if (!*kGSettingsSymbols[i].function) {
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(nsGSettingsService, nsIGSettingsService)
+
+nsGSettingsService::~nsGSettingsService()
+{
+  if (gioLib) {
+    PR_UnloadLibrary(gioLib);
+    gioLib = nullptr;
+  }
+}
+
+NS_IMETHODIMP
+nsGSettingsService::GetCollectionForSchema(const nsACString& schema,
+                                           nsIGSettingsCollection** collection)
+{
+  NS_ENSURE_ARG_POINTER(collection);
+
+  const char * const *schemas = g_settings_list_schemas();
+
+  for (uint32_t i = 0; schemas[i] != nullptr; i++) {
+    if (schema.Equals(schemas[i])) {
+      GSettings *settings = g_settings_new(PromiseFlatCString(schema).get());
+      nsGSettingsCollection *mozGSettings = new nsGSettingsCollection(settings);
+      NS_ADDREF(*collection = mozGSettings);
+      return NS_OK;
+    }
+  }
+
+  return NS_ERROR_FAILURE;
+}
diff --git a/toolkit/system/gnome/nsGSettingsService.h b/toolkit/system/gnome/nsGSettingsService.h
new file mode 100644
index 000000000..6ffcdedd1
--- /dev/null
+++ b/toolkit/system/gnome/nsGSettingsService.h
@@ -0,0 +1,27 @@
+/* -*- Mode: C++; 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/. */
+
+#ifndef nsGSettingsService_h_
+#define nsGSettingsService_h_
+
+#include "nsIGSettingsService.h"
+
+#define NS_GSETTINGSSERVICE_CID \
+{0xbfd4a9d8, 0xd886, 0x4161, {0x81, 0xef, 0x88, 0x68, 0xda, 0x11, 0x41, 0x70}}
+
+class nsGSettingsService final : public nsIGSettingsService
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIGSETTINGSSERVICE
+
+  nsresult Init();
+
+private:
+  ~nsGSettingsService();
+};
+
+#endif
+
diff --git a/toolkit/system/gnome/nsGnomeModule.cpp b/toolkit/system/gnome/nsGnomeModule.cpp
new file mode 100644
index 000000000..6ecebcc1f
--- /dev/null
+++ b/toolkit/system/gnome/nsGnomeModule.cpp
@@ -0,0 +1,78 @@
+/* -*- Mode: C++; 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 "nsToolkitCompsCID.h"
+#include "mozilla/ModuleUtils.h"
+
+#include <glib-object.h>
+
+#ifdef MOZ_ENABLE_GCONF
+#include "nsGConfService.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsGConfService, Init)
+#endif
+#ifdef MOZ_ENABLE_GIO
+#include "nsGIOService.h"
+#include "nsGSettingsService.h"
+#include "nsPackageKitService.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR(nsGIOService)
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsGSettingsService, Init)
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsPackageKitService, Init)
+#endif
+#include "nsSystemAlertsService.h"
+NS_GENERIC_FACTORY_CONSTRUCTOR_INIT(nsSystemAlertsService, Init)
+
+#ifdef MOZ_ENABLE_GCONF
+NS_DEFINE_NAMED_CID(NS_GCONFSERVICE_CID);
+#endif
+#ifdef MOZ_ENABLE_GIO
+NS_DEFINE_NAMED_CID(NS_GIOSERVICE_CID);
+NS_DEFINE_NAMED_CID(NS_GSETTINGSSERVICE_CID);
+NS_DEFINE_NAMED_CID(NS_PACKAGEKITSERVICE_CID);
+#endif
+NS_DEFINE_NAMED_CID(NS_SYSTEMALERTSSERVICE_CID);
+
+static const mozilla::Module::CIDEntry kGnomeCIDs[] = {
+#ifdef MOZ_ENABLE_GCONF
+  { &kNS_GCONFSERVICE_CID, false, nullptr, nsGConfServiceConstructor },
+#endif
+#ifdef MOZ_ENABLE_GIO
+  { &kNS_GIOSERVICE_CID, false, nullptr, nsGIOServiceConstructor },
+  { &kNS_GSETTINGSSERVICE_CID, false, nullptr, nsGSettingsServiceConstructor },
+  { &kNS_PACKAGEKITSERVICE_CID, false, nullptr, nsPackageKitServiceConstructor },
+#endif
+  { &kNS_SYSTEMALERTSSERVICE_CID, false, nullptr, nsSystemAlertsServiceConstructor },
+  { nullptr }
+};
+
+static const mozilla::Module::ContractIDEntry kGnomeContracts[] = {
+#ifdef MOZ_ENABLE_GCONF
+  { NS_GCONFSERVICE_CONTRACTID, &kNS_GCONFSERVICE_CID },
+#endif
+#ifdef MOZ_ENABLE_GIO
+  { NS_GIOSERVICE_CONTRACTID, &kNS_GIOSERVICE_CID },
+  { NS_GSETTINGSSERVICE_CONTRACTID, &kNS_GSETTINGSSERVICE_CID },
+  { NS_PACKAGEKITSERVICE_CONTRACTID, &kNS_PACKAGEKITSERVICE_CID },
+#endif
+  { NS_SYSTEMALERTSERVICE_CONTRACTID, &kNS_SYSTEMALERTSSERVICE_CID },
+  { nullptr }
+};
+
+static nsresult
+InitGType ()
+{
+  g_type_init();
+  return NS_OK;
+}
+
+static const mozilla::Module kGnomeModule = {
+  mozilla::Module::kVersion,
+  kGnomeCIDs,
+  kGnomeContracts,
+  nullptr,
+  nullptr,
+  InitGType
+};
+
+NSMODULE_DEFN(mozgnome) = &kGnomeModule;
diff --git a/toolkit/system/gnome/nsPackageKitService.cpp b/toolkit/system/gnome/nsPackageKitService.cpp
new file mode 100644
index 000000000..c32a91367
--- /dev/null
+++ b/toolkit/system/gnome/nsPackageKitService.cpp
@@ -0,0 +1,267 @@
+/* -*- Mode: C++; 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 "nsArrayUtils.h"
+#include "nsIObserver.h"
+#include "nsIObserverService.h"
+#include "nsISupportsPrimitives.h"
+#include "nsPackageKitService.h"
+#include "nsString.h"
+#include "prlink.h"
+#include "mozilla/Unused.h"
+#include "mozilla/UniquePtr.h"
+
+#include <glib.h>
+#include <glib-object.h>
+#include <limits>
+
+using namespace mozilla;
+
+typedef struct _GAsyncResult GAsyncResult;
+typedef enum {
+  G_BUS_TYPE_STARTER = -1,
+  G_BUS_TYPE_NONE = 0,
+  G_BUS_TYPE_SYSTEM  = 1,
+  G_BUS_TYPE_SESSION = 2
+} GBusType;
+typedef struct _GCancellable GCancellable;
+typedef enum {
+  G_DBUS_CALL_FLAGS_NONE = 0,
+  G_DBUS_CALL_FLAGS_NO_AUTO_START = (1<<0)
+} GDBusCallFlags;
+typedef struct _GDBusInterfaceInfo GDBusInterfaceInfo;
+typedef struct _GDBusProxy GDBusProxy;
+typedef enum {
+  G_DBUS_PROXY_FLAGS_NONE = 0,
+  G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES = (1<<0),
+  G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS = (1<<1),
+  G_DBUS_PROXY_FLAGS_DO_NOT_AUTO_START = (1<<2),
+  G_DBUS_PROXY_FLAGS_GET_INVALIDATED_PROPERTIES = (1<<3)
+} GDBusProxyFlags;
+typedef struct _GVariant GVariant;
+typedef void (*GAsyncReadyCallback) (GObject *source_object,
+                                     GAsyncResult *res,
+                                     gpointer user_data);
+
+#define GDBUS_FUNCTIONS \
+  FUNC(g_dbus_proxy_call, void, (GDBusProxy *proxy, const gchar *method_name, GVariant *parameters, GDBusCallFlags flags, gint timeout_msec, GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data)) \
+  FUNC(g_dbus_proxy_call_finish, GVariant*, (GDBusProxy *proxy, GAsyncResult *res, GError **error)) \
+  FUNC(g_dbus_proxy_new_finish, GDBusProxy*, (GAsyncResult *res, GError **error)) \
+  FUNC(g_dbus_proxy_new_for_bus, void, (GBusType bus_type, GDBusProxyFlags flags, GDBusInterfaceInfo *info, const gchar *name, const gchar *object_path, const gchar *interface_name,  GCancellable *cancellable, GAsyncReadyCallback callback, gpointer user_data)) \
+  FUNC(g_variant_is_floating, gboolean, (GVariant *value)) \
+  FUNC(g_variant_new, GVariant*, (const gchar *format_string, ...)) \
+  FUNC(g_variant_unref, void, (GVariant* value))
+
+#define FUNC(name, type, params) \
+  typedef type (*_##name##_fn) params; \
+  static _##name##_fn _##name;
+
+GDBUS_FUNCTIONS
+
+#undef FUNC
+
+#define g_dbus_proxy_call _g_dbus_proxy_call
+#define g_dbus_proxy_call_finish _g_dbus_proxy_call_finish
+#define g_dbus_proxy_new_finish _g_dbus_proxy_new_finish
+#define g_dbus_proxy_new_for_bus _g_dbus_proxy_new_for_bus
+#define g_variant_is_floating _g_variant_is_floating
+#define g_variant_new _g_variant_new
+#define g_variant_unref _g_variant_unref
+
+static PRLibrary *gioLib = nullptr;
+
+typedef void (*nsGDBusFunc)();
+struct nsGDBusDynamicFunction {
+  const char *functionName;
+  nsGDBusFunc *function;
+};
+
+nsresult
+nsPackageKitService::Init()
+{
+#define FUNC(name, type, params) { #name, (nsGDBusFunc *)&_##name },
+  const nsGDBusDynamicFunction kGDBusSymbols[] = {
+    GDBUS_FUNCTIONS
+  };
+#undef FUNC
+
+  if (!gioLib) {
+    gioLib = PR_LoadLibrary("libgio-2.0.so.0");
+    if (!gioLib)
+      return NS_ERROR_FAILURE;
+  }
+
+  for (uint32_t i = 0; i < ArrayLength(kGDBusSymbols); i++) {
+    *kGDBusSymbols[i].function =
+      PR_FindFunctionSymbol(gioLib, kGDBusSymbols[i].functionName);
+    if (!*kGDBusSymbols[i].function) {
+      return NS_ERROR_FAILURE;
+    }
+  }
+
+  return NS_OK;
+}
+
+NS_IMPL_ISUPPORTS(nsPackageKitService, nsIPackageKitService)
+
+nsPackageKitService::~nsPackageKitService()
+{
+  if (gioLib) {
+    PR_UnloadLibrary(gioLib);
+    gioLib = nullptr;
+  }
+}
+
+static const char* InstallPackagesMethods[] = {
+  "InstallPackageNames",
+  "InstallMimeTypes",
+  "InstallFontconfigResources",
+  "InstallGStreamerResources"
+};
+
+struct InstallPackagesProxyNewData {
+  nsCOMPtr<nsIObserver> observer;
+  uint32_t method;
+  GVariant* parameters;
+};
+
+static void
+InstallPackagesNotifyObserver(nsIObserver* aObserver,
+                              gchar* aErrorMessage)
+{
+  if (aObserver) {
+    aObserver->Observe(nullptr, "packagekit-install",
+                       aErrorMessage ?
+                       NS_ConvertUTF8toUTF16(aErrorMessage).get() :
+                       nullptr);
+  }
+}
+
+static void
+InstallPackagesProxyCallCallback(GObject *aSourceObject,
+                                 GAsyncResult *aResult,
+                                 gpointer aUserData)
+{
+  nsCOMPtr<nsIObserver> observer = static_cast<nsIObserver*>(aUserData);
+  GDBusProxy* proxy = reinterpret_cast<GDBusProxy*>(aSourceObject);
+
+  GError* error = nullptr;
+  GVariant* result = g_dbus_proxy_call_finish(proxy, aResult, &error);
+  if (result) {
+    InstallPackagesNotifyObserver(observer, nullptr);
+    g_variant_unref(result);
+  } else {
+    NS_ASSERTION(error, "g_dbus_proxy_call_finish should set error when it returns NULL");
+    InstallPackagesNotifyObserver(observer, error->message);
+    g_error_free(error);
+  }
+
+  g_object_unref(proxy);
+  Unused << observer.forget().take();
+}
+
+static void
+InstallPackagesProxyNewCallback(GObject *aSourceObject,
+                                GAsyncResult *aResult,
+                                gpointer aUserData)
+{
+  InstallPackagesProxyNewData* userData =
+    static_cast<InstallPackagesProxyNewData*>(aUserData);
+
+  NS_ASSERTION(g_variant_is_floating(userData->parameters),
+               "userData->parameters should be a floating reference.");
+
+  GError* error = nullptr;
+  GDBusProxy* proxy = g_dbus_proxy_new_finish(aResult, &error);
+
+  if (proxy) {
+    // Send the asynchronous request to install the packages
+    // This call will consume the floating reference userData->parameters so we
+    // don't need to release it explicitly.
+    nsIObserver* observer;
+    userData->observer.forget(&observer);
+    g_dbus_proxy_call(proxy,
+                      InstallPackagesMethods[userData->method],
+                      userData->parameters,
+                      G_DBUS_CALL_FLAGS_NONE,
+                      G_MAXINT,
+                      nullptr,
+                      &InstallPackagesProxyCallCallback,
+                      static_cast<gpointer>(observer));
+  } else {
+    NS_ASSERTION(error, "g_dbus_proxy_new_finish should set error when it returns NULL");
+    InstallPackagesNotifyObserver(userData->observer, error->message);
+    g_error_free(error);
+    g_variant_unref(userData->parameters);
+  }
+  delete userData;
+}
+
+NS_IMETHODIMP
+nsPackageKitService::InstallPackages(uint32_t aInstallMethod,
+                                     nsIArray* aPackageArray,
+                                     nsIObserver* aObserver)
+{
+  NS_ENSURE_ARG(aPackageArray);
+
+  uint32_t arrayLength;
+  aPackageArray->GetLength(&arrayLength);
+  if (arrayLength == 0 ||
+      arrayLength == std::numeric_limits<uint32_t>::max() ||
+      aInstallMethod >= PK_INSTALL_METHOD_COUNT) {
+    return NS_ERROR_INVALID_ARG;
+  }
+
+  // Create the GVariant* parameter from the list of packages.
+  GVariant* parameters = nullptr;
+  auto packages = MakeUnique<gchar*[]>(arrayLength + 1);
+
+  nsresult rv = NS_OK;
+  for (uint32_t i = 0; i < arrayLength; i++) {
+    nsCOMPtr<nsISupportsString> package =
+      do_QueryElementAt(aPackageArray, i);
+    if (!package) {
+      rv = NS_ERROR_FAILURE;
+      break;
+    }
+    nsString data;
+    package->GetData(data);
+    packages[i] = g_strdup(NS_ConvertUTF16toUTF8(data).get());
+    if (!packages[i]) {
+      rv = NS_ERROR_OUT_OF_MEMORY;
+      break;
+    }
+  }
+  packages[arrayLength] = nullptr;
+
+  if (NS_SUCCEEDED(rv)) {
+    // We create a new GVariant object to send parameters to PackageKit.
+    parameters = g_variant_new("(u^ass)", static_cast<guint32>(0),
+                               packages.get(), "hide-finished");
+    if (!parameters) {
+      rv = NS_ERROR_OUT_OF_MEMORY;
+    }
+  }
+  for (uint32_t i = 0; i < arrayLength; i++) {
+    g_free(packages[i]);
+  }
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  // Send the asynchronous request to load the bus proxy
+  InstallPackagesProxyNewData* data = new InstallPackagesProxyNewData;
+  data->observer = aObserver;
+  data->method = aInstallMethod;
+  data->parameters = parameters;
+  g_dbus_proxy_new_for_bus(G_BUS_TYPE_SESSION,
+                           G_DBUS_PROXY_FLAGS_NONE,
+                           nullptr,
+                           "org.freedesktop.PackageKit",
+                           "/org/freedesktop/PackageKit",
+                           "org.freedesktop.PackageKit.Modify",
+                           nullptr,
+                           &InstallPackagesProxyNewCallback,
+                           static_cast<gpointer>(data));
+  return NS_OK;
+}
diff --git a/toolkit/system/gnome/nsPackageKitService.h b/toolkit/system/gnome/nsPackageKitService.h
new file mode 100644
index 000000000..b14c7c51f
--- /dev/null
+++ b/toolkit/system/gnome/nsPackageKitService.h
@@ -0,0 +1,26 @@
+/* -*- Mode: C++; 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/. */
+
+#ifndef nsPackageKitService_h_
+#define nsPackageKitService_h_
+
+#include "nsIPackageKitService.h"
+
+#define NS_PACKAGEKITSERVICE_CID \
+{0x9c95515e, 0x611d, 0x11e4, {0xb9, 0x7e, 0x60, 0xa4, 0x4c, 0x71, 0x70, 0x42}}
+
+class nsPackageKitService final : public nsIPackageKitService
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIPACKAGEKITSERVICE
+
+  nsresult Init();
+
+private:
+  ~nsPackageKitService();
+};
+
+#endif
diff --git a/toolkit/system/gnome/nsSystemAlertsService.cpp b/toolkit/system/gnome/nsSystemAlertsService.cpp
new file mode 100644
index 000000000..2af64383c
--- /dev/null
+++ b/toolkit/system/gnome/nsSystemAlertsService.cpp
@@ -0,0 +1,118 @@
+/* -*- Mode: C++; 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 "nsComponentManagerUtils.h"
+#include "nsXULAppAPI.h"
+#include "nsSystemAlertsService.h"
+#include "nsAlertsIconListener.h"
+#include "nsAutoPtr.h"
+
+NS_IMPL_ADDREF(nsSystemAlertsService)
+NS_IMPL_RELEASE(nsSystemAlertsService)
+
+NS_INTERFACE_MAP_BEGIN(nsSystemAlertsService)
+   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIAlertsService)
+   NS_INTERFACE_MAP_ENTRY(nsIAlertsService)
+NS_INTERFACE_MAP_END_THREADSAFE
+
+nsSystemAlertsService::nsSystemAlertsService()
+{
+}
+
+nsSystemAlertsService::~nsSystemAlertsService()
+{}
+
+nsresult
+nsSystemAlertsService::Init()
+{
+  return NS_OK;
+}
+
+NS_IMETHODIMP nsSystemAlertsService::ShowAlertNotification(const nsAString & aImageUrl, const nsAString & aAlertTitle, 
+                                                           const nsAString & aAlertText, bool aAlertTextClickable,
+                                                           const nsAString & aAlertCookie,
+                                                           nsIObserver * aAlertListener,
+                                                           const nsAString & aAlertName,
+                                                           const nsAString & aBidi,
+                                                           const nsAString & aLang,
+                                                           const nsAString & aData,
+                                                           nsIPrincipal * aPrincipal,
+                                                           bool aInPrivateBrowsing,
+                                                           bool aRequireInteraction)
+{
+  nsCOMPtr<nsIAlertNotification> alert =
+    do_CreateInstance(ALERT_NOTIFICATION_CONTRACTID);
+  NS_ENSURE_TRUE(alert, NS_ERROR_FAILURE);
+  nsresult rv = alert->Init(aAlertName, aImageUrl, aAlertTitle,
+                            aAlertText, aAlertTextClickable,
+                            aAlertCookie, aBidi, aLang, aData,
+                            aPrincipal, aInPrivateBrowsing,
+                            aRequireInteraction);
+  NS_ENSURE_SUCCESS(rv, rv);
+  return ShowAlert(alert, aAlertListener);
+}
+
+NS_IMETHODIMP nsSystemAlertsService::ShowPersistentNotification(const nsAString& aPersistentData,
+                                                                nsIAlertNotification* aAlert,
+                                                                nsIObserver* aAlertListener)
+{
+  return ShowAlert(aAlert, aAlertListener);
+}
+
+NS_IMETHODIMP nsSystemAlertsService::ShowAlert(nsIAlertNotification* aAlert,
+                                               nsIObserver* aAlertListener)
+{
+  NS_ENSURE_ARG(aAlert);
+
+  nsAutoString alertName;
+  nsresult rv = aAlert->GetName(alertName);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  RefPtr<nsAlertsIconListener> alertListener =
+    new nsAlertsIconListener(this, alertName);
+  if (!alertListener)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  AddListener(alertName, alertListener);
+  return alertListener->InitAlertAsync(aAlert, aAlertListener);
+}
+
+NS_IMETHODIMP nsSystemAlertsService::CloseAlert(const nsAString& aAlertName,
+                                                nsIPrincipal* aPrincipal)
+{
+  RefPtr<nsAlertsIconListener> listener = mActiveListeners.Get(aAlertName);
+  if (!listener) {
+    return NS_OK;
+  }
+  mActiveListeners.Remove(aAlertName);
+  return listener->Close();
+}
+
+bool nsSystemAlertsService::IsActiveListener(const nsAString& aAlertName,
+                                             nsAlertsIconListener* aListener)
+{
+  return mActiveListeners.Get(aAlertName) == aListener;
+}
+
+void nsSystemAlertsService::AddListener(const nsAString& aAlertName,
+                                        nsAlertsIconListener* aListener)
+{
+  RefPtr<nsAlertsIconListener> oldListener = mActiveListeners.Get(aAlertName);
+  mActiveListeners.Put(aAlertName, aListener);
+  if (oldListener) {
+    // If an alert with this name already exists, close it.
+    oldListener->Close();
+  }
+}
+
+void nsSystemAlertsService::RemoveListener(const nsAString& aAlertName,
+                                           nsAlertsIconListener* aListener)
+{
+  if (IsActiveListener(aAlertName, aListener)) {
+    // The alert may have been replaced; only remove it from the active
+    // listeners map if it's the same.
+    mActiveListeners.Remove(aAlertName);
+  }
+}
diff --git a/toolkit/system/gnome/nsSystemAlertsService.h b/toolkit/system/gnome/nsSystemAlertsService.h
new file mode 100644
index 000000000..66ae2ea27
--- /dev/null
+++ b/toolkit/system/gnome/nsSystemAlertsService.h
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; 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/. */
+
+#ifndef nsSystemAlertsService_h__
+#define nsSystemAlertsService_h__
+
+#include "nsIAlertsService.h"
+#include "nsDataHashtable.h"
+#include "nsCOMPtr.h"
+
+class nsAlertsIconListener;
+
+class nsSystemAlertsService : public nsIAlertsService
+{
+public:
+  NS_DECL_NSIALERTSSERVICE
+  NS_DECL_ISUPPORTS
+
+  nsSystemAlertsService();
+
+  nsresult Init();
+
+  bool IsActiveListener(const nsAString& aAlertName,
+                        nsAlertsIconListener* aListener);
+  void RemoveListener(const nsAString& aAlertName,
+                      nsAlertsIconListener* aListener);
+
+protected:
+  virtual ~nsSystemAlertsService();
+
+  void AddListener(const nsAString& aAlertName,
+                   nsAlertsIconListener* aListener);
+
+  nsDataHashtable<nsStringHashKey, nsAlertsIconListener*> mActiveListeners;
+};
+
+#endif /* nsSystemAlertsService_h__ */