User Agent

stagefright/1.2 (Linux;Android 4.3)

This user agent belongs to stagefright. This Multimedia Player run on Android and it renders web contents with WebKit on general Mobile Phone.

Multimedia Player - stagefright

stagefright

Version1.2 @ 32 bit
Developerunknown
Parentstagefright 1.2
Platform android 4.3 (32 bit) by Google Inc
Device TypeMobile Phone

Act as 

Mobile Yes
Tablet No
Crawler No
Fake No
Anonymized No

Capabilities

Rendering EngineWebKit 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.)
Pointingtouchscreen
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