Hey im having trouble getting this navigation bar to work on firefox. It works perfectly fine on chrome though. Heres the code:

CSS:
Code:
<style>
nav ul ul {
	display: none;
}

	nav ul li:hover > ul {
		display: block;
	}

nav ul {
	background: #080808 ; 
	background: linear-gradient(top, #080808 0%, #bbbbbb 100%);  
	background: -moz-linear-gradient(top, #080808 0%, #bbbbbb 100%); 
	background: -webkit-linear-gradient(top, #080808 0%,#bbbbbb 1500%); 
	-moz-box-shadow: 1px 2px 9px rgba(0,0,0,0.15);
	-webkit-boxshadow: 1px 2px 9px rgba(0,0,0,0.15);
        box-shadow: 1px 2px 9px rgba(0,0,0,0.15);
	padding: 0px 0px;
        -moz-border-radius:6px;
	-webkit-border-radius:6px;
	border-radius: 6px;
  
	list-style: none;
	position: relative;
	display: inline-table;
}
	nav ul:after {
		content: ""; clear: both; display: block;
	}

nav ul li {
	float: left; 
}
	nav ul li:hover {
		background: #101010;
		background: linear-gradient(top, #bf0000 0%, #700000  40%);
		background: -moz-linear-gradient(top, #bf0000 0%, #700000  40%);
		background: -webkit-linear-gradient(top, #bf0000 0%, #700000  40%);
                -moz-border-radius:6px;
	        -webkit-border-radius:6px;
                border-radius: 6px;
	}
		nav ul li:hover a {
			color: #fff;
		}
	
	nav ul li a {
		display: block; padding: 15px 25px;
		color: #F8F8F8; text-decoration: none;
               
	}


nav ul ul {
	background: #202020; border-radius: 10px; padding: 5px;
	position: absolute; top: 100%;
}
	nav ul ul li {
		float: none; 
		border-top: 0px solid #6b727c;
		border-bottom: 0px solid #000000;
		position: relative;
	}
		nav ul ul li a {
			padding: 2px 20px 7px 7px;
			color: #fff;
		}	
			nav ul ul li a:hover {
				background: ;
			}

nav ul ul ul {
	position: absolute; left: 100%; top:0;
}

#navbar {
position: relative;
overflow: visible;
z-index: 100;
}
</style>

HTML
Code:
<div id="navbar"><nav>
<ul>
<li><a href="http://www.sentinelgaming.net">Home</a></li>
<li><a href="http://www.sentinelgaming.net/communityinfo">Community</a>
  <ul>
    <li><a href="http://www.sentinelgaming.net/communityinfo">About Us / Info</a></li>
    <li><a href="http://www.sentinelgaming.net/servers">Servers</a></li>
    <li><a href="http://www.sentinelgaming.net/members">Members</a>
    <li><a href="http://www.sentinelgaming.net/staff">Meet The Staff</a></li>
    <li><a href="http://www.sentinelgaming.net/communityrules">Community Rules</a></li>
    <li><a href="http://www.sentinelgaming.net/donate">Premium Membership</a>					
  </li>
  </ul>
<li><a href="http://www.sentinelgaming.net/forums">Forums</a>
  <ul>
    <li><a href="http://www.sentinelgaming.net/forums">All Forums</a></li>
    <li><a href="http://www.sentinelgaming.net/forums/m/5770961/viewforum/1312499">Support</a>          </li>
    <li><a href="http://www.sentinelgaming.net/forums/m/5770961/viewforum/1312497">Introductions</a></li>
    <li><a href="http://www.sentinelgaming.net/forums/m/5770961/viewforum/1310799">General    Discussions</a></li>
    <li><a href="http://www.sentinelgaming.net/forums/m/5770961/show/newposts">Unread Posts</a></li>
  </ul>
  </li>
<li><a href="http://www.sentinelgaming.net/join">Join</a>
  <ul>
    <li><a href="http://www.sentinelgaming.net/join">Membership</a></li>
    <li><a href="http://www.sentinelgaming.net/apply">Leadership / Merge</a></li>				
  </ul>
  </li>
<li><a href="http://www.sentinelgaming.net/generalgamingnews">Content</a>
  <ul>
    <li><a href="http://www.sentinelgaming.net/generalgamingnews">General Gaming News</a></li>
    <li><a href="http://www.sentinelgaming.net/reviews">Reviews</a></li>					
  </li>
  </ul>
<li><a href="http://www.sentinelgaming.net/calendar">Events</a>
  <ul>
    <li><a href="http://www.sentinelgaming.net/calendar">Calendar</a></li>
  </li>
  </ul>
<li><a href="http://www.sentinelgaming.net/teamtac">Competitive</a>
  <ul>
    <li><a href="http://www.sentinelgaming.net/teamtac">Starcraft II</a></li>
  </li>
  </ul>
<li><a href="http://www.sentinelgaming.net/blog">Blog</a></li>
<li><a href="http://www.sentinelgaming.net/gallery">Media</a>
  <ul>
    <li><a href="http://www.sentinelgaming.net/gallery">Image Gallery</a></li>
    <li><a href="http://www.youtube.com/sentinelgamingyt">Videos</a></li>
    <li><a href="http://www.sentinelgaming.net/arcade">Arcade</a></li>					
  </li>
  </ul>
<li><a href="http://www.sentinelgaming.net/store">Store</a></li>
  </ul>
</nav></div>
Thanks for any help I can get, and to view this navigation bar as is, please visit http://www.sentinelgaming.net/testpage