diff --git a/firefox/50-prompt_authentication.yml b/firefox/50-prompt_authentication.yml
new file mode 100644
index 00000000..57a548e6
--- /dev/null
+++ b/firefox/50-prompt_authentication.yml
@@ -0,0 +1,11 @@
+%YAML 1.2
+---
+version: 1.1
+
+prompt_authentication:
+  description: Prompt for authentication if password is saved
+  default: true
+  disabled:
+    variable: _.proxy_mode
+    when: No proxy
+...