Finally, the best ad blocker. Which not go to the ads provider to gain some money by showing some ads (ad block+, and their ad blockers). Open-source, and extremely efficient in ram/cpu use. At the end, ubo let to the network usage to be lower, even I live in israel where the connection price is extremely low, and limits very high (if have), I prefer to be with lowest network usage that I can in one side and in other to be able to navigate the web without ads.