diff --git a/.docker/firefox/policies.json b/.docker/firefox/policies.json
index f48f45fd..d062762c 100644
--- a/.docker/firefox/policies.json
+++ b/.docker/firefox/policies.json
@@ -135,6 +135,7 @@
     "FlashPlugin": {},
     "HardwareAcceleration": false,
     "Homepage": {
+      "Additional": [],
       "StartPage": "none"
     },
     "NewTabPage": true,