anchor.diff:  
   
       @contextmanager
  -    def test_new_win(description):
  +    def test_new_win(description, url, window_name):
           create_new_win()
  +        machine.wait_for_window("New Tab")
  +        machine.send_chars(f"{url}\n")
  +        machine.wait_for_window(window_name)
  +        machine.screenshot(description)
  +        machine.succeed(
  +            ru(
  +                "${xdo "copy-all" ''
  +                  key --delay 1000 Ctrl+a Ctrl+c
  +                ''}"
  +            )
  +        )
  +        clipboard = machine.succeed(
  +            ru("${pkgs.xclip}/bin/xclip -o")
  +        )
  +        print(f"{description} window content:\n{clipboard}")
           with machine.nested(description):
  -            yield
  +            yield clipboard
           # Close the newly created window:
           machine.send_key("ctrl-w")
   
  
positive.code: 
          machine.screenshot("after_copy_from_chromium")
  
      machine.shutdown()
    '';
  }) channelMap
  
negative.code: 
      machine.screenshot("startup_done")
  
      with test_new_win("sandbox_info", "chrome://sandbox", "Sandbox Status") as clipboard:
          filters = [
              "layer 1 sandbox.*namespace",
              "pid namespaces.*yes",
  