As I add to almost every thread where this comes up, Privoxy is best used (IMO) with a well-maintained ABP list. Converters such as https://github.com/skroll/privoxy-adblock work pretty well for this task (put it on a cron and/or use LaunchControl to wrangle the update mechanism: http://www.soma-zone.com/LaunchControl/ )

I wonder if Privoxy would compile / install on the Ubiquiti EdgeRouter Lite (it should, since it just runs an ARM build of Debian, but firmware updates would possibly wipe away all your set-up). I'm also not sure if the little ERLite has enough horsepower to efficiently handle running a filtering proxy with tons of rules.