Per this announcement, I can verify running Get Support on Norton Security Suite 20.4.0.40 does not change the NVP to the previous version number any longer in FF 24. I do have NVP 12.0.3.2-1
However, it does say that it is fixing an item in the installation each and everytime Get Support is run!
Restarting and running Get Support still shows one item in Installation fixed.
Does not do this on my NIS v 21.1.0.18.
Norton has been notified.