Here is a rooted custom Android 4.2.2 firmware for the FNF iFive 3 tablet based on official version 1.0.3 dated 2014/01/02

(ifive3_FW_422_V1.0.3_201401021000.rar / ifive3_FW_422_V1.0.3_201401021000.img)

Revision history from the manufacturer (translated from Chinese)

an optimized camera resolution 2 in the camera into the gallery to see pictures returned,

the status bar flashes problems

optimized video playback video player for a long time to be wrong question

Build information:

Linux Kernel: Linux version 3.0.36+ (root@five-server2) (gcc version 4.6.x-google 20120106 (prerelease) (GCC) ) #247 SMP PREEMPT Mon Dec 30 11:39:36 CST 2013

Android build: IFive/rk30sdk/rk30sdk:4.2.2/JDQ39/eng.root.20140102.092313:eng/opinions-on-teclast-p90hdst-keys

ro.rksdk.version=RK31_ANDROID4.2.2-SDK-v1.04.00

Custom firmware features:

• root with latest SuperSU version 1.86 (free version)
• removed most Chinese and unnecessary applications
• Google Play Store fixes so more application are visible/compatible
• updated busybox v1.21.0.git (2012-11-29)
• Unix like init.d boot scripts support, more details on init.d scripts here
• changed permissions on external sdcard to allow write access
• increased space for applications (/data partition) to 4 GB
• disabled OTA updates (may cause problems, see Notes below)
• added Android 4.2 AOSP stock launcher from here
• NEW! kernel modules (cifs, tun, lan, serial, xpad) compiled by Oma & Crew RKTablets, thank guys!
• optional ClockworkMod (CWM) Recovery easy install package

Notes: 

- any update received thru OTA may interfere with our custom firmware, we recommend to refuse any update pushed OTA.

Download: kasty-fnf_ifive_3-422-103_20140102-rooted4.zip

Use Rockchip Batch Tool version 1.7 to flash the firmware, don't flash using the "sdcard" method.

Please report any problem with this firmware, I can't verify this custom firmware works as I don't have an iFive 3 to test it.