Here what i do for my 4.2.2.Leak Xperia Z. It's work like a charm:
First, delete in /system/app:
- BrowserProviderProxy.apk
- BrowserProviderProxy.odex.apk
Second,
Flash this .zip in Recovery: http://forum.xda-developers.com/attachment.php?attachmentid=1527847&d=1354392850 (Credit and thanks...