Adblock is a script that starts pixelserv and creates/manages blocklists for dnsmasq. Adbock is designed for tomato to do this without needing any GUI config changes. With your padavan firmware dnsmasq.custom is not used, the "stop" function in adblock.sh isn't doing anything other than stopping pixelserv, and restarting dnsmasq. Keeping pixelserv running is harmless. The dnsmasq restarts are just wasting CPU cycles.