title: Reliable browser detection with javascript?
body: <p>I have a website, and offcourse like most websites it loads faster in Firefox.</p>
  
  <p>I want to create some form of a bar, which displays on top of my site, whenever a user without FF enters the site.
  This bar will say something like "Install FF for better performance etc etc..."</p>
  
  <p>How should I do this? Browser detection I guess, but there are tons of different codes out there. Any code you all know that is more reliable, and better to use?</p>
  
  <p>Btw, does anybody know if I need permission from Mozilla to have such a bar on my website?</p>
  
  <p>Thanks</p>
  
  <p>EDIT: FF IS NOT THE FASTEST BROWSER, I GOT IT!</p>