diff --git a/firefox/00-proxy.yml b/firefox/00-proxy.yml
index b3585514..92b75f58 100644
--- a/firefox/00-proxy.yml
+++ b/firefox/00-proxy.yml
@@ -2,5 +2,13 @@
 ---
 version: 1.1
 
-proxy_mode: No proxy  # Configure Proxy Access to the Internet
+proxy_mode:
+  description: Configure Proxy Access to the Internet
+  choices:
+    - No proxy
+    - Auto-detect proxy settings for this network
+    - Use system proxy settings
+    - Manual proxy configuration
+    - Automatic proxy configuration URL
+  default: No proxy
 ...