User Agent

Mozilla/4.0 (compatible; U; MSIE 6.0; Windows NT 5.1) (Compatible; ; ; Trident/4.0; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; .NET CLR 1.0.3705; .NET CLR 1.1.4322)

This user agent belongs to Netscape. Netscape developed this Browser. This Browser run on WinXP and it renders web contents with Gecko on Windows Desktop.

Browser - Netscape

Netscape

Version4.0 @ 32 bit
DeveloperNetscape
ParentNetscape 4.0
Platform windows 5.1 (32 bit) by Microsoft Corporation
Device TypeDesktop

Act as 

Mobile No
Tablet No
Crawler No
Fake No
Anonymized No

Capabilities

Rendering EngineGecko by Mozilla Foundation (For Firefox, Camino, K-Meleon, SeaMonkey, Netscape, and other Gecko-based browsers.)
Pointingmouse
Javascript Yes
CSS Yes Version: 2
Cookies Yes
Tables Yes
Frames Yes
IFrames Yes
Background Sounds No
Java Applets Yes
VB Script No
Activex No