diff --git a/firefox/20-manual.yml b/firefox/20-manual.yml
new file mode 100644
index 00000000..bbd0f25c
--- /dev/null
+++ b/firefox/20-manual.yml
@@ -0,0 +1,8 @@
+%YAML 1.2
+---
+version: 1.1
+
+manual:
+
+  use_for_https: true  # Also use this proxy for HTTPS
+...