Minor refactors

modules/browser/firefox.nix

@@ -7,8 +7,8 @@
 {
   my.packages = with pkgs; [
     firefox-bin (pkgs.writeScriptBin "firefox-private" ''
-      #! ${pkgs.bash}/bin/bash
-      firefox --private-window "$@"
+      #!${stdenv.shell}
+      ${firefox}/bin/firefox --private-window "$@"
     '')
     (makeDesktopItem {
       name = "firefox-private";

modules/services/syncthing.nix

@@ -19,7 +19,7 @@
       folders =
         let deviceEnabled = devices: lib.elem config.networking.hostName devices;
             deviceType = devices:
-              if (deviceEnabled devices)
+              if deviceEnabled devices
               then "sendreceive"
               else "receiveonly";
         in {