{ config, lib, ... }: { imports = [ ./setup-firefox-mock-overlay.nix ]; config = lib.mkIf config.test.enableBig { test.asserts.assertions.expected = ['' Must not have a Firefox container with an existing ID but - ID 9 is used by dangerous, shopping'']; programs.firefox = { enable = true; profiles = { my-profile = { isDefault = true; id = 1; containers = { "shopping" = { id = 9; color = "blue"; icon = "circle"; }; "dangerous" = { id = 9; color = "red"; icon = "circle"; }; }; }; }; }; }; }