diff --git a/backend/main.py b/backend/main.py
index 2817350..5e053cf 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -444,6 +444,15 @@ async def api_eteindre():
     return {"succes": True}
 
 
+@app.post("/api/systeme/quitter-navigateur")
+async def api_quitter_navigateur():
+    import subprocess
+    log.warning("Fermeture navigateur demandee")
+    subprocess.Popen(["pkill", "-f", "firefox"])
+    subprocess.Popen(["pkill", "-f", "chromium"])
+    return {"succes": True}
+
+
 # --- WebSocket ---
 
 @app.websocket("/ws")
diff --git a/frontend/index.html b/frontend/index.html
index 5050f0e..ae1e8a9 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -486,6 +486,7 @@
 
           <h3>Systeme</h3>
           <button class="btn-action" onclick="location.reload()">Mettre a jour l'affichage</button>
+          <button class="btn-secondaire" onclick="quitterNavigateur()">Quitter le navigateur</button>
           <button class="btn-danger" onclick="confirmerRedemarrage()">Redemarrer le systeme</button>
           <button class="btn-danger" onclick="confirmerExtinction()">Eteindre le systeme</button>
         </div>
diff --git a/frontend/js/admin.js b/frontend/js/admin.js
index e371104..b285860 100644
--- a/frontend/js/admin.js
+++ b/frontend/js/admin.js
@@ -631,6 +631,10 @@ function confirmerExtinction() {
   if (confirm('Eteindre le systeme ?')) apiPost('/api/systeme/eteindre');
 }
 
+function quitterNavigateur() {
+  apiPost('/api/systeme/quitter-navigateur');
+}
+
 // === Utilitaires ===
 
 function setValue(id, val) {