User Agent

Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729; Diffbot/0.1; +http://www.diffbot.com)

This user agent belongs to Diffbot. This Bot run on WinXP and it renders web contents with WebKit on Windows Desktop.

Bot - Diffbot

Diffbot

Version	? @ 32 bit
Developer	unknown
Parent	Diffbot
Platform	Windows XP Operating System: Windows XP windows 5.1 (32 bit) by Microsoft Corporation
Device Type	Desktop
More info	http://www.diffbot.com

Act as

Mobile	No
Tablet	No
Crawler	Yes Bot / Crawler / Spider Any program (such as a robot or spider) that is used to automatically discover and scan websites by following links from one webpage to another.
Fake	No
Anonymized	No

Capabilities

Rendering Engine	WebKit by Apple Inc (For Google Chrome, iOS (including both mobile Safari, WebViews within third-party apps, and web clips), Safari, Arora, Midori, OmniWeb, Shiira, iCab since version 4, Web, SRWare Iron, Rekonq, and in Maxthon 3.)
Pointing	mouse
Javascript	Yes
CSS	Yes Version: 3
Cookies	Yes
Tables	Yes

Frames	Yes
IFrames	Yes
Background Sounds	No
Java Applets	Yes
VB Script	No
Activex	No