Parse user agent by default according to spec.

http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html
see 14.43

src/bowser.js

@@ -16,6 +16,11 @@
       return (match && match.length > 1 && match[1]) || '';
     }
 
+    function getSecondMatch(regex) {
+      var match = ua.match(regex);
+      return (match && match.length > 1 && match[2]) || '';
+    }
+
     var iosdevice = getFirstMatch(/(ipod|iphone|ipad)/i).toLowerCase()
       , likeAndroid = /like android/i.test(ua)
       , android = !likeAndroid && /android/i.test(ua)
@@ -142,7 +147,12 @@
       , version: versionIdentifier
       }
     }
-    else result = {}
+    else {
+      result = {
+        name: getFirstMatch(/^(.*)\/(.*) /),
+        version: getSecondMatch(/^(.*)\/(.*) /)
+     };
+   }
 
     // set webkit or gecko flag for browsers based on these engines
     if (/(apple)?webkit/i.test(ua)) {