diff -up thunderbird-102.6.0/toolkit/system/gnome/nsGIOService.cpp.D165152 thunderbird-102.6.0/toolkit/system/gnome/nsGIOService.cpp
--- thunderbird-102.6.0/toolkit/system/gnome/nsGIOService.cpp.D165152	2022-12-12 22:37:40.000000000 +0100
+++ thunderbird-102.6.0/toolkit/system/gnome/nsGIOService.cpp	2022-12-20 13:41:17.337477022 +0100
@@ -19,6 +19,7 @@
 #include "mozilla/WidgetUtilsGtk.h"
 #include "mozilla/StaticPrefs_widget.h"
 #include "mozilla/net/DNS.h"
+#include "prenv.h"
 
 #include <gio/gio.h>
 #include <gtk/gtk.h>
@@ -224,9 +225,7 @@ static RefPtr<GAppLaunchContext> GetLaun
   return context;
 }
 
-NS_IMETHODIMP
-nsGIOMimeApp::LaunchWithURI(nsIURI* aUri,
-                            mozilla::dom::BrowsingContext* aBrowsingContext) {
+static NS_IMETHODIMP LaunchWithURIImpl(RefPtr<GAppInfo> aInfo, nsIURI* aUri) {
   GList uris = {0};
   nsCString spec;
   aUri->GetSpec(spec);
@@ -235,7 +234,7 @@ nsGIOMimeApp::LaunchWithURI(nsIURI* aUri
 
   GUniquePtr<GError> error;
   gboolean result = g_app_info_launch_uris(
-      mApp, &uris, GetLaunchContext().get(), getter_Transfers(error));
+      aInfo, &uris, GetLaunchContext().get(), getter_Transfers(error));
   if (!result) {
     g_warning("Cannot launch application: %s", error->message);
     return NS_ERROR_FAILURE;
@@ -244,6 +243,27 @@ nsGIOMimeApp::LaunchWithURI(nsIURI* aUri
   return NS_OK;
 }
 
+NS_IMETHODIMP
+nsGIOMimeApp::LaunchWithURI(nsIURI* aUri,
+                            mozilla::dom::BrowsingContext* aBrowsingContext) {
+  if (mozilla::widget::CanTransferWaylandFocus()) {
+    mozilla::widget::RequestWaylandFocus()->Then(
+        GetMainThreadSerialEventTarget(), __func__,
+        /* resolve */
+        [app = RefPtr{mApp}, uri = RefPtr{aUri}](nsCString token) {
+          PR_SetEnv(ToNewCString("XDG_ACTIVATION_TOKEN="_ns + token));
+          LaunchWithURIImpl(app, uri);
+        },
+        /* reject */
+        [app = RefPtr{mApp}, uri = RefPtr{aUri}](bool state) {
+          LaunchWithURIImpl(app, uri);
+        });
+    return NS_OK;
+  }
+
+  return LaunchWithURIImpl(mApp, aUri);
+}
+
 class GIOUTF8StringEnumerator final : public nsStringEnumeratorBase {
   ~GIOUTF8StringEnumerator() = default;
 
@@ -531,7 +551,7 @@ nsGIOService::GetDescriptionForMimeType(
   return NS_OK;
 }
 
-nsresult nsGIOService::ShowURI(nsIURI* aURI) {
+static nsresult ShowURIImpl(nsIURI* aURI) {
   nsAutoCString spec;
   MOZ_TRY(aURI->GetSpec(spec));
   GUniquePtr<GError> error;
@@ -544,7 +564,24 @@ nsresult nsGIOService::ShowURI(nsIURI* a
   return NS_OK;
 }
 
-static nsresult LaunchPath(const nsACString& aPath) {
+nsresult nsGIOService::ShowURI(nsIURI* aURI) {
+  if (mozilla::widget::CanTransferWaylandFocus()) {
+    mozilla::widget::RequestWaylandFocus()->Then(
+        GetMainThreadSerialEventTarget(), __func__,
+        /* resolve */
+        [uri = RefPtr{aURI}](nsCString token) {
+          PR_SetEnv(ToNewCString("XDG_ACTIVATION_TOKEN="_ns + token));
+          ShowURIImpl(uri);
+        },
+        /* reject */
+        [uri = RefPtr{aURI}](bool state) { ShowURIImpl(uri); });
+    return NS_OK;
+  }
+
+  return ShowURIImpl(aURI);
+}
+
+static nsresult LaunchPathImpl(const nsACString& aPath) {
   RefPtr<GFile> file = dont_AddRef(
       g_file_new_for_commandline_arg(PromiseFlatCString(aPath).get()));
   GUniquePtr<char> spec(g_file_get_uri(file));
@@ -558,6 +595,22 @@ static nsresult LaunchPath(const nsACStr
   return NS_OK;
 }
 
+static nsresult LaunchPath(const nsACString& aPath) {
+  if (mozilla::widget::CanTransferWaylandFocus()) {
+    mozilla::widget::RequestWaylandFocus()->Then(
+        GetMainThreadSerialEventTarget(), __func__,
+        /* resolve */
+        [path = nsCString{aPath}](nsCString token) {
+          PR_SetEnv(ToNewCString("XDG_ACTIVATION_TOKEN="_ns + token));
+          LaunchPathImpl(path);
+        },
+        /* reject */
+        [path = nsCString{aPath}](bool state) { LaunchPathImpl(path); });
+    return NS_OK;
+  }
+  return LaunchPathImpl(aPath);
+}
+
 nsresult nsGIOService::LaunchFile(const nsACString& aPath) {
   return LaunchPath(aPath);
 }