{ config, lib, pkgs, ... }: with lib; { imports = [ ./setup-firefox-mock-overlay.nix ]; config = lib.mkIf config.test.enableBig { programs.firefox = { enable = true; enableGnomeExtensions = true; }; test.asserts.warnings.expected = ['' Using 'programs.firefox.enableGnomeExtensions' has been deprecated and will be removed in the future. Please change to overriding the package configuration using 'programs.firefox.package' instead. You can refer to its example for how to do this. '']; }; }