For those of you who want the latest Android 4.4.3 stock firmware, it is now available for Nexus 7 variants including original Nexus 7, Nexus 7 3G, and New Nexus 7 2013 Edition.
Currently Verizon Nexus 7 2013 Android 4.4.3 stock firmware is not available but you may be able to get custom ROMs.
For rooted users, you can also just grab the stock ROM version, which is same thing as stock firmware but easily installable using CWM or TWRP recovery with root.Need Help? Best way to contact me is on Twitter!
You can also follow me on Google+ or Facebook here:
Nexus 7 Reference
You will need a rooted Nexus 7 to install all ROM/kernels.
First time to rooting and custom ROMs? Please see our Nexus 7 Root FAQ FIRST!