Apart from an occasional nudge they show, to rate the plugin (once every month or so I guess, not more) - the plugin has prevented so many ads from showing.

it brock only one site and still the best

Amazing! Kudos4u all =D

Sometimes it's a little slow, but I have literally no ads so it's great!

good so far.

one of the best

This an excelente ADD-ON, it should be installed by defaut in all browsers.