diff --git a/toolkit/components/downloads/DownloadPlatform.cpp b/toolkit/components/downloads/DownloadPlatform.cpp
index 44986aad765a..a1a2fafa7c4f 100644
--- a/toolkit/components/downloads/DownloadPlatform.cpp
+++ b/toolkit/components/downloads/DownloadPlatform.cpp
@@ -49,10 +49,6 @@ DownloadPlatform* DownloadPlatform::GetDownloadPlatform() {
 
   NS_ADDREF(gDownloadPlatformService);
 
-#if defined(MOZ_WIDGET_GTK)
-  g_type_init();
-#endif
-
   return gDownloadPlatformService;
 }
 
diff --git a/toolkit/system/gnome/components.conf b/toolkit/system/gnome/components.conf
index aa20019def03..1aa0ab104873 100644
--- a/toolkit/system/gnome/components.conf
+++ b/toolkit/system/gnome/components.conf
@@ -4,12 +4,6 @@
 # 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/.
 
-InitFunc = 'mozilla::InitGType'
-
-Headers = [
-    '/toolkit/system/gnome/nsGnomeModule.h',
-]
-
 Classes = [
     {
         'cid': '{e3a1f3c9-3ae1-4b40-a5e0-7b457fc9a9ad}',
diff --git a/toolkit/system/gnome/moz.build b/toolkit/system/gnome/moz.build
index 77330ca644a9..0fc94ed9e39a 100644
--- a/toolkit/system/gnome/moz.build
+++ b/toolkit/system/gnome/moz.build
@@ -9,7 +9,6 @@ with Files("**"):
 
 SOURCES += [
     "nsAlertsIconListener.cpp",
-    "nsGnomeModule.cpp",
     "nsSystemAlertsService.cpp",
 ]
 
diff --git a/toolkit/system/gnome/nsGnomeModule.cpp b/toolkit/system/gnome/nsGnomeModule.cpp
deleted file mode 100644
index f073bc0d1b68..000000000000
--- a/toolkit/system/gnome/nsGnomeModule.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-/* -*- 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 "nsGnomeModule.h"
-
-#include <glib-object.h>
-
-namespace mozilla {
-nsresult InitGType() {
-  g_type_init();
-  return NS_OK;
-}
-}  // namespace mozilla
diff --git a/toolkit/system/gnome/nsGnomeModule.h b/toolkit/system/gnome/nsGnomeModule.h
deleted file mode 100644
index 2cbe69a35da2..000000000000
--- a/toolkit/system/gnome/nsGnomeModule.h
+++ /dev/null
@@ -1,10 +0,0 @@
-/* -*- 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 "nscore.h"
-
-namespace mozilla {
-nsresult InitGType();
-}  // namespace mozilla
diff --git a/widget/gtk/nsAppShell.cpp b/widget/gtk/nsAppShell.cpp
index cfe022e65d82..24bdd5083375 100644
--- a/widget/gtk/nsAppShell.cpp
+++ b/widget/gtk/nsAppShell.cpp
@@ -116,12 +116,6 @@ nsAppShell::~nsAppShell() {
 }
 
 nsresult nsAppShell::Init() {
-  // For any versions of Glib before 2.36, g_type_init must be explicitly called
-  // to safely use the library. Failure to do so may cause various
-  // failures/crashes in any code that uses Glib, Gdk, or Gtk. In later versions
-  // of Glib, this call is a no-op.
-  g_type_init();
-
   mozilla::hal::Init();
 
 #ifdef MOZ_ENABLE_DBUS
diff --git a/widget/gtk/nsSound.cpp b/widget/gtk/nsSound.cpp
index d71c9db28f18..4d685d856600 100644
--- a/widget/gtk/nsSound.cpp
+++ b/widget/gtk/nsSound.cpp
@@ -82,9 +82,10 @@ struct ScopedCanberraFile {
 static ca_context* ca_context_get_default() {
   // This allows us to avoid race conditions with freeing the context by handing
   // that responsibility to Glib, and still use one context at a time
-  static GStaticPrivate ctx_static_private = G_STATIC_PRIVATE_INIT;
+  static GPrivate ctx_private =
+      G_PRIVATE_INIT((GDestroyNotify)ca_context_destroy);
 
-  ca_context* ctx = (ca_context*)g_static_private_get(&ctx_static_private);
+  ca_context* ctx = (ca_context*)g_private_get(&ctx_private);
 
   if (ctx) {
     return ctx;
@@ -95,8 +96,7 @@ static ca_context* ca_context_get_default() {
     return nullptr;
   }
 
-  g_static_private_set(&ctx_static_private, ctx,
-                       (GDestroyNotify)ca_context_destroy);
+  g_private_set(&ctx_private, ctx);
 
   GtkSettings* settings = gtk_settings_get_default();
   if (g_object_class_find_property(G_OBJECT_GET_CLASS(settings),