navigator.userAgent is no longer reliable (was it ever?)

eg.

1/ IE11/Win7:
navigator.userAgent = "Mozilla/5.0 (Windows NT 6.1; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET4.0C; Tablet PC 2.0; .NET4.0E; EIE10;FRFRWOL; rv:11.0) like Gecko"
doesn't even mention 'IE'

2/ http://api.jquery.com/jQuery.browser/: "The $.browser property is deprecated in jQuery 1.3, and its functionality may be moved to a team-supported plugin in a future release of jQuery."

To detect browser features, modernizr.js is your friend - http://modernizr.com/

>Don't believe that's true. The useragent string for IE11 shows 'MSIE 11'
>I think it's the .NET browser definition files that provide the HttpBrowserCapabilities.Browser string....