Firmware Update On Nexus 5?
I new to the Nexus 5, I used to to used the HTC One and on the One I could flashed ROM, radio, and firmware. I know that Google will soon release Android 4.4.3. Currently I have my Nexus 5 rooted with TWRP and PA. On my old One what I did when HTC released 4.4.2 update, was I flashed the phone back to stock (with S-OFF) get the update then rerooted with a custom ROM so that I can have the latest firmware. My question is that will I have to do the same thing too? Does the Nexus 5 even have a firmware update? If the new update does contain a new firmware can I used the method I used on the One? Or can I just update my PA ROM to 4.4.3 and be done?
Thanks for the help, I am just confused right now.