diff --git a/.env b/.env
index 683675a4..1c43487f 100644
--- a/.env
+++ b/.env
@@ -101,6 +101,11 @@ APP_TRAVEL_SNAPSHOT_RETENTION_BUFFER_DAYS=14
 # because the cached travels and TravelSnapshot rows carry the parsed price.
 APP_BPN_LEVEL_BOARDING_POINT_PRICES=true
 
+# Off turns every navigation into a full page load, which the web debug toolbar needs: its loader
+# script never runs on a boosted body swap. Explicit hx-get/hx-post requests are unaffected.
+# Only for local debugging; prod and the boosted code paths (HxRedirectResponse, error modal) need it on.
+APP_HTMX_BOOST=true
+
 # Emails
 APP_DEFAULT_EMAIL_FROM=info@ep-reisen.de
 APP_DEFAULT_EMAIL_TO=info@ep-reisen.de
diff --git a/config/packages/twig.yaml b/config/packages/twig.yaml
index 100ceb17..7ea0024e 100644
--- a/config/packages/twig.yaml
+++ b/config/packages/twig.yaml
@@ -5,6 +5,7 @@ twig:
         '%kernel.project_dir%/assets/images': images
     globals:
         htmx_change_trigger: 'change delay:100ms'
+        htmx_boost: '%env(bool:APP_HTMX_BOOST)%'
         website_base_url: '%env(APP_WEBSITE_BASE_URL)%'
         customer_service_email: '%env(APP_CUSTOMER_SERVICE_EMAIL)%'
         legal_notice_url: '%env(APP_LEGAL_NOTICE_URL)%'
diff --git a/templates/base.html.twig b/templates/base.html.twig
index 9a7463cc..73596582 100644
--- a/templates/base.html.twig
+++ b/templates/base.html.twig
@@ -27,7 +27,7 @@
             {{ encore_entry_script_tags('app') }}
         {% endblock %}
     </head>
-    <body class="bg-white text-gray-700 font-sans antialiased {{ booking_theme() }}"{% if not oauth2 %} hx-boost="true"{% endif %}>
+    <body class="bg-white text-gray-700 font-sans antialiased {{ booking_theme() }}"{% if not oauth2 and htmx_boost %} hx-boost="true"{% endif %}>
         {% block body %}{% endblock %}
         {% block data_layer %}{% endblock %}
     </body>