diff --git a/pkgs/applications/networking/browsers/firefox-bin/default.nix b/pkgs/applications/networking/browsers/firefox-bin/default.nix
index e699115ab29d..551453e9a2eb 100644
--- a/pkgs/applications/networking/browsers/firefox-bin/default.nix
+++ b/pkgs/applications/networking/browsers/firefox-bin/default.nix
@@ -72,9 +72,9 @@ let
 
   policies = {
     DisableAppUpdate = true;
-  };
+  } // config.firefox.policies or {};
 
-  policiesJson = writeText "no-update-firefox-policy.json" (builtins.toJSON { inherit policies; });
+  policiesJson = writeText "firefox-policies.json" (builtins.toJSON { inherit policies; });
 
   defaultSource = lib.findFirst (sourceMatches "en-US") {} sources;