diff --git a/user/firefox.nix b/user/firefox.nix
index 2cf2e43..9f8ceb2 100644
--- a/user/firefox.nix
+++ b/user/firefox.nix
@@ -1,10 +1,12 @@
 {
   config,
   pkgs,
+  lib,
   ...
 }:
 let
-  inherit (config.my.theme) color;
+  inherit (config.my) theme desktop;
+  inherit (theme) color;
 
   bugfixedFirefox = pkgs.firefox-devedition-unwrapped // {
     requireSigning = false;
@@ -133,7 +135,7 @@ in
             "devtools.chrome.enabled" = true;
             "devtools.debugger.remote-enabled" = true;
           };
-          userChrome = ''
+          userChrome = lib.optionalString (color.type == "dark" && desktop == "sway") ''
             #sidebar-main {
               background-color: ${color.bg};
             }