Firefox and Chrome extension to see how much you are worth are available @ https://team.inria.fr/privatics/yourvalue/
FF plugin directly from Mozilla: https://addons.mozilla.org/en-US/firefox/addon/rtbwatcher/
statistics so far from http://yourvalue.inrialpes.fr/
Average price of users $0.001200
Price of the cheapest user $0.000076
Price of the most expensive user $0.008000
You can also pay with Bitcoin.
These tests evaluate the impact of anti-virus software on system performance, as programs running in background – such as real time protection antivirus software -
AV-comparatives performance chart
For more in depth see:
Performance-Test (AV) May 2013 PDF
NOD32 is very fast, its core is written in assembly. source from NOD32, see performance
I can recommend Palemoon.instead of Waterfox.
Its compiled for new (SSE2) cpu's and some "redundant and optional code" is disabled.