diff --git a/pkgs/applications/networking/browsers/firefox/common.nix b/pkgs/applications/networking/browsers/firefox/common.nix
index a35963bbdd41..3d2132c2d1e4 100644
--- a/pkgs/applications/networking/browsers/firefox/common.nix
+++ b/pkgs/applications/networking/browsers/firefox/common.nix
@@ -21,6 +21,11 @@
 , tests ? []
 }:
 
+let
+  # Rename the variables to prevent infinite recursion
+  requireSigningDefault = requireSigning;
+  allowAddonSideloadDefault = allowAddonSideload;
+in
 
 { lib
 , pkgs
@@ -80,6 +85,10 @@
 
 # optionals
 
+## addon signing/sideloading
+, requireSigning ? requireSigningDefault
+, allowAddonSideload ? allowAddonSideloadDefault
+
 ## debugging
 
 , debugBuild ? false