Toppie!!!

Does what it says on the tin, no frills, just blocks ads, and blocks them well! If it fails to block an ad too, you can right click to get the option to higlight the element in which the ad is on and it'll block it from there.

Excellent *Ad'*-on ;)

This extension does exactly what is promised. I have seen zero ads since installation. I am very concerned about the permissions though. I would NEVER install this on my PC where I make financial transactions because this is a key-logger type of data retention extension. Plus they require unlimited data storage on your machine and others! The convenience of blocking ads is a minor benefit compared with the price paid in permissions granted. I keep this add-on because I only watch YouTube videos on the tablet where it is installed.

This app does an excellent job blocking ads. Virtually stopped all adds after installing on Firefox.