Just a note.
Using a DNS filtering looks more efficient then browser-based advert blocking.

Just up dnsmasq and use a TOR for name resolution.
dnsmasq.conf:
no-resolv
listen-address=127.0.0.1
server=127.0.0.1#9053
clear-on-reload
log-facility=/var/log/dnsmasq.log
log-queries
conf-file=/etc/dnsmasq.adblock.conf
conf-file=/etc/dnsmasq_myblock.conf

List of ad servers can be downloaded here ->

Regularly I exec simple Perl scripts to get an all unblocked DNS queries and looking for an ad server. Script live here.