diff --git a/firefox/40-no_proxy.yml b/firefox/40-no_proxy.yml
new file mode 100644
index 0000000..b166d7d
--- /dev/null
+++ b/firefox/40-no_proxy.yml
@@ -0,0 +1,12 @@
+---
+no_proxy:
+  description: Address for which proxy will be desactivated
+  type: "domainname"
+  params:
+    allow_ip: true
+    allow_cidr_network: true
+    allow_without_dot: true
+    allow_startswith_dot: true
+  disabled:
+    variable: proxy_mode
+    when: No proxy