title: firefox (Gecko) conditional style sheet
body: <p>today I'm trying to optimize my website for a better rendering in firefox!
  my problems are the text-shadow and font-weight properties ... I would like to set custom values only for firefox (my website is mac only compatible so I don't need IE compatibility) but I don't wont to use separate style sheet for only these two properties!!!
  There is any way to do that? Or I must use a php script to filter the user agent and load customized style sheets for firefox?</p>
  
  <p>Thanks in advance!</p>