diff --git a/etc/firefox/policies/policies.json b/etc/firefox/policies/policies.json
index 7396401d..efafb3eb 100644
--- a/etc/firefox/policies/policies.json
+++ b/etc/firefox/policies/policies.json
@@ -40,7 +40,7 @@
       },
       "{3c078156-979c-498b-8990-85f7987dd929}": {
         "install_url": "https://addons.mozilla.org/firefox/downloads/latest/sidebery/latest.xpi",
-        "installation_mode": "normal_installed"
+        "installation_mode": "force_installed"
       },
       "{446900e4-71c2-419f-a6a7-df9c091e268b}": {
         "install_url": "https://addons.mozilla.org/firefox/downloads/latest/bitwarden-password-manager/latest.xpi",