Description of [root] FlashFire
<b>FlashFire</b> is the most advanced on-device firmware flasher available for <b>rooted</b> Android devices. It can flash full firmware packages from various manufacturers, as well as apply over-the-air (OTA) and ZIP updates - all while maintaining root, and without using a custom recovery. It also offers full device backup and restore functionalities in several formats. Relevant files can be stored on internal storage, SD cards, USB connected storage, or can even be streamed directly to and from your computer using USB or Wi-Fi.
<b>FlashFire</b> is the spiritual successor to the <b>Mobile ODIN</b> app, which was a similar solution (using completely different methods under the hood) exclusively for Samsung devices on older Android versions.
<b>FlashFire</b> is an extremely powerful application, it should be used with caution. Data loss, soft-bricks, and even hard-bricks are possible if used incorrectly. Unless you are an expert user, consult <b>FlashFire</b>'s website and the XDA discussion thread before doing anything potentially destructive.
Note: currently all functionality is unlocked without purchasing Pro. This may change in the future!
XDA discussion thread: http://forum.xda-developers.com/general/paid-software/flashfire-t3075433