Honorable mention goes to Adnauseam (https://adnauseam.io/). It is an extension for Firefox and Chrome, which clicks on almost every ad. Hopefully, costing advertisers money. The interesting part is: Google removed Adnauseum from their Chrome Extensions. If you anyway install it, every Chrome restart requires that you re-enable the extension.

I like the extension... the advertisers are costing me money by consuming bandwidth, and slowing down everything... well I will try to hit them where it hurts.