diff --git a/pkgs/applications/networking/browsers/firefox/wrapper.nix b/pkgs/applications/networking/browsers/firefox/wrapper.nix
index cf5405a4a071..078fa0885b78 100644
--- a/pkgs/applications/networking/browsers/firefox/wrapper.nix
+++ b/pkgs/applications/networking/browsers/firefox/wrapper.nix
@@ -30,7 +30,7 @@ let
     }:
 
     let
-      cfg = stdenv.lib.attrByPath [ browserName ] {} config;
+      cfg = config.${browserName} or {};
       enableAdobeFlash = cfg.enableAdobeFlash or false;
       ffmpegSupport = browser.ffmpegSupport or false;
       gssSupport = browser.gssSupport or false;