diff --git a/hal/linux/UPowerClient.cpp b/hal/linux/UPowerClient.cpp
index 816d223ec5e9..d5f5e1ca5268 100644
--- a/hal/linux/UPowerClient.cpp
+++ b/hal/linux/UPowerClient.cpp
@@ -167,9 +167,13 @@ void UPowerClient::BeginListening() {
             UpdateTrackedDevices();
           },
           [](GUniquePtr<GError>&& aError) {
-            g_warning(
-                "Failed to create DBus proxy for org.freedesktop.UPower: %s\n",
-                aError->message);
+            if (!g_error_matches(aError.get(), G_IO_ERROR,
+                                 G_IO_ERROR_CANCELLED)) {
+              g_warning(
+                  "Failed to create DBus proxy for org.freedesktop.UPower: "
+                  "%s\n",
+                  aError->message);
+            }
           });
 }
 
@@ -275,9 +279,12 @@ void UPowerClient::UpdateTrackedDevices() {
                              G_CALLBACK(DeviceChanged), this);
           },
           [this](GUniquePtr<GError>&& aError) {
-            g_warning(
-                "Failed to enumerate devices of org.freedesktop.UPower: %s\n",
-                aError->message);
+            if (!g_error_matches(aError.get(), G_IO_ERROR,
+                                 G_IO_ERROR_CANCELLED)) {
+              g_warning(
+                  "Failed to enumerate devices of org.freedesktop.UPower: %s\n",
+                  aError->message);
+            }
             g_signal_connect(mUPowerProxy, "g-signal",
                              G_CALLBACK(DeviceChanged), this);
           });
diff --git a/widget/gtk/MPRISServiceHandler.cpp b/widget/gtk/MPRISServiceHandler.cpp
index d9d18944629c..458e22fb82d6 100644
--- a/widget/gtk/MPRISServiceHandler.cpp
+++ b/widget/gtk/MPRISServiceHandler.cpp
@@ -318,9 +318,11 @@ void g_bus_get_callback(GObject* aSourceObject, GAsyncResult* aRes,
 
   GDBusConnection* conn = g_bus_get_finish(aRes, getter_Transfers(error));
   if (!conn) {
-    NS_WARNING(nsPrintfCString("Failure at g_bus_get_finish: %s",
-                               error ? error->message : "Unknown Error")
-                   .get());
+    if (!IsCancelledGError(error.get())) {
+      NS_WARNING(nsPrintfCString("Failure at g_bus_get_finish: %s",
+                                 error ? error->message : "Unknown Error")
+                     .get());
+    }
     return;
   }
 
diff --git a/widget/gtk/nsAppShell.cpp b/widget/gtk/nsAppShell.cpp
index 8b2c8031088e..7b1fb20041f8 100644
--- a/widget/gtk/nsAppShell.cpp
+++ b/widget/gtk/nsAppShell.cpp
@@ -220,7 +220,7 @@ void nsAppShell::DBusConnectClientResponse(GObject* aObject,
   RefPtr<GDBusProxy> proxyClient =
       dont_AddRef(g_dbus_proxy_new_finish(aResult, getter_Transfers(error)));
   if (!proxyClient) {
-    if (!g_error_matches(error.get(), G_IO_ERROR, G_IO_ERROR_CANCELLED)) {
+    if (!IsCancelledGError(error.get())) {
       NS_WARNING(
           nsPrintfCString("Failed to connect to client: %s\n", error->message)
               .get());
diff --git a/widget/gtk/nsUserIdleServiceGTK.cpp b/widget/gtk/nsUserIdleServiceGTK.cpp
index e8741d108695..c556d8ff5847 100644
--- a/widget/gtk/nsUserIdleServiceGTK.cpp
+++ b/widget/gtk/nsUserIdleServiceGTK.cpp
@@ -196,9 +196,11 @@ class UserIdleServiceMutter : public UserIdleServiceImpl {
               },
               [this](GUniquePtr<GError>&& aError) {
                 mPollInProgress = false;
-                g_warning("Failed to call GetIdletime(): %s\n",
-                          aError->message);
-                mUserIdleServiceGTK->RejectAndTryNextServiceCallback();
+                if (!IsCancelledGError(aError.get())) {
+                  g_warning("Failed to call GetIdletime(): %s\n",
+                            aError->message);
+                  mUserIdleServiceGTK->RejectAndTryNextServiceCallback();
+                }
               });
     }
 
@@ -227,7 +229,9 @@ class UserIdleServiceMutter : public UserIdleServiceImpl {
               mUserIdleServiceGTK->AcceptServiceCallback();
             },
             [this](GUniquePtr<GError>&& aError) {
-              mUserIdleServiceGTK->RejectAndTryNextServiceCallback();
+              if (!IsCancelledGError(aError.get())) {
+                mUserIdleServiceGTK->RejectAndTryNextServiceCallback();
+              }
             });
     return true;
   }