Xperifirm Tool is a Sony firmware download tool available for Windows and with some workaround can be used on Mac and Linux platforms too.
The Xperifirm.com is the place where you can download all the older and newer versions of Xperifirm ~ Xperia Firmware Downloader. With Xperifirm you can download the current firmware for any Sony/Sony-Ericsson Xperia-line Smartphones, Tablets, and Accessories running Android (except really old ones).
All thanks to IgorEisberg for developing this Tool and making Sony Firmware downloading easy for us. 🙂