Team XYZ shows off FW 3.70 hack for the PSVita / PSTV and TheFlow teases ‘modoru’ which may be a hombrew utility letting you downgrade your PSVita’s firmware!
If you’re stuck on firwmare 3.69 or firmware 3.70, then keep your eyes peeled because apparently Team Molecule are currently sitting on an FW 3.70 hack that works through the browser similar to FW...