Chrome will block ads that consume 4MB of network data or 15 seconds of CPU

Any ad is a "heavy ad" by my measurement.

uBlock Origin significantly decreases the loading time of most websites, particularly news media and e-commerce websites, which are plagued with aggressive tracking and adware.

Anytime I use a machine without ad-blocking I'm shocked by how obnoxious the advertising landscape has become. Some news websites have 70% of the top fold covered in ads.

Wonderful opportunity for Mozilla and Microsoft to outmarket Chrome: "We will block ads that consume more than 4 bytes of network data or 1ms of CPU"