Depends on what sites you visit, but hooking every single HTTP call and HTML DOM isn't cheap. I often find websites with ads to be just as fast as websites with

Depends on what sites you visit, but hooking every single HTTP call and HTML DOM isn't cheap. I often find websites with ads to be just as fast as websites without them, just more cluttered, unusable, and more of a privacy nightmare. The uBO overhead does seem to impact CPU usage, though. I'll gladly pay the 15 minutes of battery power spent on filtering out that trash.