diff --git a/etc/firefox/policies/policies.json b/etc/firefox/policies/policies.json
index 75e33669..0c25db51 100644
--- a/etc/firefox/policies/policies.json
+++ b/etc/firefox/policies/policies.json
@@ -290,10 +290,10 @@
 				"restricted_domains": []
 			},
 			"chrome-mask@overengineer.dev": {
-				"blocked_install_message": "Chrome Mask",
+				"blocked_install_message": "Chrome Mask. Detected by Google, caused insecure browser alerts in 2026-01",
 				"default_area": "navbar",
 				"install_url": "https://addons.mozilla.org/firefox/downloads/latest/chrome-mask/latest.xpi",
-				"installation_mode": "normal_installed",
+				"installation_mode": "blocked",
 				"private_browsing": false
 			},
 			"goeuropean@example.com": {