Today I installed Kaspersky Internet Security 2016 (KIS) on my desktop PC. After that I wanted to do some web development (APEX stuff to be more precisely).
I started Firefox and opened the Firebug console. What a suprise!
I saw repeating AJAX calls at least once a second. For other (non-APEX) webpages there were even like 5-20 AJAX calls per second!
01-11-2016 IMPORTANT UPDATE:
Please see Theo’s comment regarding a permanent solution you
can configure from inside KIS. Thanks Theo!