diff --git a/etc/firefox/policies/policies.json b/etc/firefox/policies/policies.json
index 884275d1..3d7ecccd 100644
--- a/etc/firefox/policies/policies.json
+++ b/etc/firefox/policies/policies.json
@@ -375,6 +375,12 @@
 				"installation_mode": "normal_installed",
 				"private_browsing": false
 			},
+			"{90b8ecca-860a-4f1c-8476-e181df2cf635}": {
+				"default_area": "navbar",
+				"install_url": "https://addons.mozilla.org/firefox/downloads/latest/grayscale-bro/latest.xpi",
+				"installation_mode": "force_installed",
+				"private_browsing": true
+			},
 			"{b11bea1f-a888-4332-8d8a-cec2be7d24b9}": {
 				"default_area": "navbar",
 				"install_url": "https://addons.mozilla.org/firefox/downloads/latest/torproject-snowflake/latest.xpi",