diff --git a/clapper_src/webapp.js b/clapper_src/webapp.js
new file mode 100644
index 00000000..e5bd1168
--- /dev/null
+++ b/clapper_src/webapp.js
@@ -0,0 +1,64 @@
+const { Gio, GObject } = imports.gi;
+const Debug = imports.clapper_src.debug;
+const Misc = imports.clapper_src.misc;
+
+let { debug } = Debug;
+
+var WebApp = GObject.registerClass(
+class ClapperWebApp extends Gio.SubprocessLauncher
+{
+    _init()
+    {
+        const flags = Gio.SubprocessFlags.STDOUT_SILENCE
+            | Gio.SubprocessFlags.STDERR_SILENCE;
+
+        super._init({ flags });
+
+        this.remoteApp = null;
+        this.isRemoteClosing = false;
+
+        this.setenv('GDK_BACKEND', 'broadway', true);
+    }
+
+    startRemoteApp()
+    {
+        if(this.remoteApp)
+            return;
+
+        this.remoteApp = this.spawnv([Misc.appId + 'Remote']);
+        this.remoteApp.wait_async(null, this._onRemoteClosed.bind(this));
+
+        debug('remote app started');
+    }
+
+    stopRemoteApp()
+    {
+        if(!this.remoteApp || this.isRemoteClosing)
+            return;
+
+        this.isRemoteClosing = true;
+        this.remoteApp.force_exit();
+
+        debug('send stop signal to remote app');
+    }
+
+    _onRemoteClosed(proc, result)
+    {
+        let hadError;
+
+        try {
+            hadError = proc.wait_finish(result);
+        }
+        catch(err) {
+            debug(err);
+        }
+
+        this.remoteApp = null;
+        this.isRemoteClosing = false;
+
+        if(hadError)
+            debug('remote app exited with error');
+
+        debug('remote app closed');
+    }
+});
diff --git a/pkgs/flatpak/lib/gtk4.json b/pkgs/flatpak/lib/gtk4.json
index 5f2a38eb..4a8da02a 100644
--- a/pkgs/flatpak/lib/gtk4.json
+++ b/pkgs/flatpak/lib/gtk4.json
@@ -3,6 +3,7 @@
     "buildsystem": "meson",
     "config-opts": [
         "--wrap-mode=nofallback",
+        "-Dbroadway-backend=true",
         "-Dwin32-backend=false",
         "-Dmacos-backend=false",
         "-Dmedia-ffmpeg=disabled",
@@ -10,7 +11,8 @@
         "-Dprint-cloudprint=disabled",
         "-Dintrospection=enabled",
         "-Ddemos=false",
-        "-Dbuild-examples=false"
+        "-Dbuild-examples=false",
+        "-Dbuild-tests=false"
     ],
     "sources": [
         {