{
  description = "Figma Windows UA Spoofer - Firefox signing environment";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    flake-utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, flake-utils }:
    flake-utils.lib.eachDefaultSystem (system:
      let
        pkgs = import nixpkgs { inherit system; };
      in
      {
        devShells.default = pkgs.mkShell {
          packages = with pkgs; [
            bash
            zip
            web-ext
            nodejs
          ];
        };

        apps.sign-firefox = {
          type = "app";
          program = toString (pkgs.writeShellScript "sign-firefox" ''
            set -euo pipefail
            exec ${pkgs.bash}/bin/bash ./sign-firefox.sh
          '');
        };
      });
}